List of Ben 10 aliens

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Ben 10 is an American media franchise created by Man of Action Studios and produced by Cartoon Network Studios. It revolves around a boy named Ben Tennyson who acquires a watch-like alien device, the Omnitrix, which allows him to transform into ten different alien creatures. The franchise consists primarily of five television series and four films, the latter of which aired between August 2007 and March 2012. The following is a list that includes the franchise's alien creatures, deeming its voice actor, main characteristics and any other information which is otherwise notable.


Introduced in Ben 10[edit]

This list includes the aliens that were introduced to the franchise through the 2005 original series.


Voiced by:

Heatblast is a Pyronite from the star Pyros. He is a magma-based alien composed of a bright inner magma body covered by a reddish-brown charcoal-like crust. Heatblast is essentially "living magma", so everything he touches melts or catches fire.

In the original series, Heatblast is Ben's first alien transformation. Ben accidentally transformed into Heatblast and started a wildfire in the first episode of the original series, “And Then There Were 10”, after trying to remove the Omnitrix when it first attached to him. In the original series episode “Side Effects”, Ben caught a cold, which gave Heatblast cryokinetic powers instead of his normal pyrokinetic abilities. This returned to normal once Ben got over his cold. After "Ken 10", he has flaming shoulders and his crust doesn't cover his hands as much.

Ben later regained access to Heatblast in "Ben 10: Ultimate Alien" "Ben 10,000 Returns", and 10-year-old Heatblast in "The Forge of Creation". Heatblast reappears in "Viktor: The Spoils," when 16-year-old Ben uses him to defeat King Xarion. He now has darker skin and his eyes are no longer connected to the fire on his head, like Alan Albright (the Pyronite-human hybrid Plumber's son).

16-year-old Heatblast made his Omniverse debut in "A Jolt From the Past" to chase Corvo, while 11-year-old Heatblast debuted in "Trouble Helix" to fight Malware on Galvan B. In Omniverse, for both Bens, he looks similar to his appearance in Ultimate Alien. His eyes are once again connected to the fire on his head, his shoulder plates are slightly tilted up, and the 16-year-old Heatblast is taller and much more muscular. He wears the Omnitrix symbol on his chest.

In the reboot, his voice sounds like a teenager rather than the deeper voice he had in previous incarnations. Also, the Omnitrix symbol is placed closer to his head. Heatblast can also transform into Omni-Enhanced Heatblast since the episode "Bon Voyage", gaining Shock Rock's rock armor on his upper body and shoulders while his hands and face turn blue. He has a large grey rock jetpack which he can use to fly at high speeds and can mix electricity into his fire.


Voiced by:

  • Dee Bradley Baker - Ben 10, Ben 10: Ultimate Alien, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters
  • Tara Strong - Ben 10 (Dream in "Ghostfreaked Out")

Wildmutt/Wildpup is a Vulpimancer from the planet Vulpin; he is a large dog-like creature with no visible eyes or tail. The eyeless Vulpimancers use echolocation, heightened smell, and thermographic neck gills to navigate. Wildmutt's porcupine-like quills supplement his sonar and can be used as projectiles or protect him while he is rolling. This ability is unique to adult Vulpimancers, and as Ben's version is only sixteen years old, these quills have not fully developed. However, in "Ken 10”, he is fully grown, possesses adult Vulpimancer abilities, and has the Omnitrix symbol on his forehead.

Ben first transformed into Wildmutt in "And Then There Were 10" after his experimentation with the Omnitrix, and is thus his first intentional transformation. In "Ben 10: Ultimate Alien," Wildmutt's design was unchanged except for his lips being orange instead of black and the Ultimatrix symbol being on his chest. His first official debut in "Ben 10: Ultimate Alien" was in "Prisoner #775 is Missing", where he was used to track the invisible alien prisoner. In "Side Effects", when Ben caught a cold, he is unable to smell because his gills are clogged with mucus. His only speaking appearance was in a nightmare in "Ghostfreaked Out", when he tried to save a boy stuck in a tree and turned into Ghostfreak.

In "Ben 10: Omniverse", Wildmutt's design is mostly unchanged, and his Omnitrix symbol is on a green collar with white stripes. 16-year-old Wildmutt made his Omniverse debut in "Have I Got a Deal For You" to track down the Screegit, while 11-year-old Wildmutt debuted in "Evil's Encore" when he freed himself, Gwen, and Grandpa Max from a sack.

Ultimate Wildmutt[edit]

Voiced by:

Ultimate Wildmutt debuted in "Prisoner #775 is Missing". He is the same as normal Wildmutt, but has maroon fur, three bone-like fins, and a spiked tail. He is also now capable of speech.


Voiced by:

Diamondhead is a Petrosapien (coming from "petra", which means "rock", and "sapien", which means "intelligent being") from the planet Petropia. He is a silicon based alien, with a dense molecular structure that makes him practically invulnerable. Diamondhead can control his crystal physiology at will, allowing him to create crude crystal weapons from any part of his body, fire crystal shards from his hands, regenerate, and regrow lost limbs. However, there is a limit to how much damage he can recover from. In addition to growing crystal from himself, Diamondhead can grow crystal over the ground. His crystal body acts as a prism that can refract light and energy beams. However, Diamondhead's crystal can shatter if exposed to strong sonic vibrations.

In "Ken 10", Diamondhead's suit has changed, having black on the top and white pants, and the Omnitrix symbol now being on his chest.

Ben first transformed into Diamondhead to destroy Vilgax's giant robot sent to retrieve the Omnitrix in "And Then There Were 10". In the planning stages of the show, Diamondhead was supposed to be one of the aliens beyond the original ten aliens, while Cannonbolt would have been one of the original ten aliens.[citation needed]

Diamondhead was regained after Vilgax destroyed Chromastone in the 2-part "Ben 10: Alien Force" episode "Vengeance of Vilgax". The color of his crystals is changed slightly and he doesn't wear any clothes. Instead he is composed of a material similar to Chromastone, has the Omnitrix symbol located on his chest, and now has green eyes. Diamondhead made his "Ben 10: Ultimate Alien" debut in "Basic Training" to defeat Brannigan, with no difference from his “Alien Force” design.

In "Ben 10: Omniverse", Diamondhead and 11-year-old Diamondhead have a black shirt with a green stripe in the middle, black pants, and the Omnitrix symbol on their belt. Diamondhead made his Omniverse debut in "It Was Them" to fight Slamworm, while 11 year-old Diamondhead made his debut in "Trouble Helix" to fight Malware.

In the reboot, he is slimmer, the spike on his head is now at an angle, he wears a black bodysuit with a pointed yellow line, and the Omnitrix symbol is on his chest. In this incarnation, Diamondhead's donor is of the war-like Subsapien offshoot who are manipulated by another Petropian species known as the Antrosapiens into fighting their fellow Petrosapiens. Diamondhead later gains the ability to become Omni-Enhanced Diamondhead with Shock Rock's armor forming around his torso, shoulders, head, and arms. He has two blue energy spikes on each arm, V-shaped energy below the Omnitrix symbol on his chest, energy coming out of rocks on his back, and energy on his head coming out of the rock. He can control crystal and absorb and redirect energy.


Voiced by:

XLR8 (pronounced "accelerate") is a Kineceleran from the planet Kinet. XLR8 has ball-like shoes, scissor-like claws, and a retracting helmet with a windshield. XLR8 can manipulate friction to reach speeds faster than lightning, climb up walls, run on water, easily come to a dead stop on most surfaces, and create tornadoes by running in a small circle or spinning. Ben first transformed into XLR8 in the first episode of the original series "And Then There Were 10" when he decided to use the Omnitrix to get revenge on Cash and JT, the bullies he fought with earlier in the episode.

In Omniverse, XLR8 has a green chest instead of white, he has three blue stripes on his tail, he is shorter, and his whole neck is white. XLR8 made his Omniverse debut in "Trouble Helix" when Ben was stuck as XLR8 until Azmuth reverted him to human.

In the reboot series, he appears the same but his chest is now dark blue and he has two shark-like fins. As of the episode "Creature Feature", XLR8 gains are ability to become Omni-Enhanced XLR8, able to move at faster speeds due to the large wheels attached to his legs. Simultaneously, he can also charge his electrically charged tail, which allows him to multiply and lengthen it, and the tail can also slice through solid rock.


Voiced by:

Speedyquick is a Universe 23 counterpart of XLR8, differing from the main universe by being light blue skinned with blue eyes, wearing a blue-striped outfit instead of green with a gold-plated Omnitrix symbol.

Grey Matter[edit]

Voiced by:

Grey Matter is a Galvan from the planet Galvan Prime, a gray frog-like alien that is five inches tall. The Galvans are a highly intelligent race responsible for many of the technologies shown in the series, including the Omnitrix, the Null Void Projector, the Null Void, their planet, Galvan Mark II (since the Highbreed destroyed their original homeworld, Galvan Prime, in the "Alien Force" two-parter "War of the Worlds"), and the Galvanic Mechamorphs (Upgrade's species).

The most notable Galvan is Azmuth, the creator of the Null Void and the Omnitrix. He claims to be the most intelligent being in at least three galaxies.

Ben expresses a dislike in becoming Grey Matter due to his small size. A running gag throughout the franchise is that he is often accessed when Ben wants a large, powerful alien. However, as Grey Matter, Ben gains a Galvan's intellect and becomes able to outwit larger enemies, create almost anything from spare parts, and deduce the function of any device at a glance. Grey Matter's size allows him to squeeze into small spaces and climb walls due to tiny suction cups on his skin; his slimy skin makes him difficult to grab. Though his small size has its advantages, it can become a disadvantage whenever the Omnitrix times out, resulting in the much larger Ben getting stuck.

Ben first intentionally transformed into Grey Matter to search for a rare gold Sumo Slammer Trading Card in cereal boxes in "Washington B.C.". Grey Matter returned in "Ben 10: Omniverse", where his white jumpsuit is now green with a belt and a pair of gloves, and the stripe on his head is now gone. Unlike most of the other aliens that had their Omnitrix symbol moved, Grey Matter's remained on his back. He made a brief debut in "Have I Got a Deal for You" as one of three accidental transformations.

In the Ben 10 reboot, his appearance is similar to "Ben 10: Omniverse", but his bodysuit is designed differently, his head stripe returns, he is shorter, and he has reddish-orange eyes. As of episode "Can I Keep It?", Grey Matter can transform into Omni-Enhanced Grey Matter, wearing Shock Rock's armor like a mech suit kept together by blue plasma.


Voiced by:

Brainfrog is an alternate counterpart to Grey Matter who has a similar appearance to Grey Matter's 10-year-old counterpart, but has a blue jumpsuit, blue eyes, and a blue Omnitrix symbol with gold plating.

Four Arms[edit]

Voiced by:

  • Richard McGonagle - Ben 10
  • Michael Reisz - Ben 10 (As Kevin in "Kevin 11")
  • Charlie Schlatter - Ben 10 (As Kevin in "Framed")
  • Vanessa Marshall - Ben 10 (As Gwen in "Gwen 10")
  • Steven Blum - Ben 10 (As 4-year-old Ben in "Don't Drink the Water")
  • Dee Bradley Baker - Ben 10: Ultimate Alien
  • John DiMaggio - Ben 10: Ultimate Alien (As 10-year-old Ben in "The Forge of Creation"), Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters, Ben 10 (Reboot)
  • Michael Emerson - Ben 10: Ultimate Alien (As Alpha in "Ben 10 / Generator Rex: Heroes United")
  • Montserrat Hernandez - Ben 10 (Reboot) (As Gwen in Ben's body in "Freaky Gwen Ben")
  • Gunnar Sizemore - Ben 10 (Reboot) (As Billy Billons in "Ben Again and Again")

Four Arms is a Tetramand from the desert planet Khoros. Tetramands are 12-foot-tall powerhouses with extremely dense musculature, making them unmatched in pure physical strength (although the females are substantially stronger than the males). However, the muscle mass and heavy skin makes Tetramands relatively slow and unable to use things normally used by smaller life forms.

Four Arms is one of Ben's favorite alien forms. Utilising Four Arms' strength and versatility, Ben can create shock waves by pounding the ground or clapping all four of his hands together, dubbed the "Big Smack", and his leg strength allows him to cross entire city blocks in a single jump. When under the effects of an illness in the episode “Side Effects”, his strength and stamina are somewhat lessened and he develops pungent armpit hives. Ben first transformed into Four Arms to fight the giant reanimated woolly mammoth in "Washington B.C.".

Four Arms reappeared in "Ben 10: Ultimate Alien", having an wrestler-like appearance. He now has golden bracelets, a ponytail, two gold sashes that cross over his trunk with the Ultimatrix symbol on the center of his chest, and green eyes instead of yellow. Four Arms is regained in "Video Games" in a fight with Ssserpent. Ben's 10-year-old version of Four Arms made an appearance in "Ben 10: Ultimate Alien", in the episode "The Forge of Creation".

In "Ben 10: Omniverse", 16-year-old and 11-year-old Four Arms' design resembles a moustached muscle man at a circus, and the Omnitrix symbol is located in his belt. 16-year-old Four Arms made his Omniverse debut in "Many Happy Returns" to fight Princess Looma, while 11-year-old Four Arms debuted in "The More Things Change: Part 1" to fight Malware. In "Game Over", Four Arms has a pirate style hat and wrestler-like clothing; the Omnitrix symbol is now on his hat. In the Ben 10,000 version, he is more muscular, his legs are black, the Omnitrix symbol is in the center of his shirt, and he has a bigger jaw with two sharp teeth.

In the reboot, his appearance is similar to his Ben 10,000 incarnation, but his gloves now cover his hands. As of the episode "Mayhem in Mascot", Four Arms can transform into Omni-Enhanced Four Arms, with Shock Rock's helmet and armor covering his upper chest and shoulders. He has four blue hands, one pair of which replaces his upper arms, giving him six arms in total.

Handy Man[edit]

Voiced by:

Handy Man is an alternate counterpart of Four Arms. Handy Man has 11 year old Four Arms' appearance, except he has blue eyes and blue on his shirt instead of white. His skin is dark pink and the rim of the Omnitrix is gold.


Voiced by:

Stinkfly is a Lepidopterran from the swamp planet Lepidopterra. Lepidopterrans can fly with high mobility and speed and have four eye stalks that give them a wide range of vision and let them shoot a toxic slime. They can excrete streams of foul-smelling liquids that vary from a flammable toxin to an immobilizing jelly. Younger members of the species emit an herbicidal gas via flatulence. If Stinkfly's wings get wet, he will be unable to fly.

Ben first transformed into Stinkfly in "Washington B.C.", when he had to defeat Dr. Animo and save Gwen after a mutant cockatiel kidnapped her and she fell from the Washington Monument. Since then, Stinkfly has been among Ben's favorite flying aliens. In "Ken 10" Stinkfly has less white on his suit, limited to his increased number of stripes, his stinger is now white, and his legs are now thicker. The 10-year-old version of Stinkfly made an appearance in the "Ben 10: Ultimate Alien" episode "The Forge of Creation". His eye color changed from orange to green, his hands are green instead of black, his teeth are white instead of green, and his Omnitrix has changed from white to green.

In Omniverse, 16-year-old Ben's Stinkfly resembled the Original Series, but his face and pupiled eyes are green and he has larger wings and a dark green suit. The younger version of Stinkfly reappears in "A Jolt from the Past" and the current version is reintroduced in "Of Predators and Prey: Part 1".

In the reboot, Stinkfly is completely redesigned as a humanoid blue dragonfly with orange butterfly wings with compound eyes instead of four eye stalks, able to fire his goo and gas from his collarbones or shoulders. Since the episode "Animorphosis", Stink Fly gained the ability to become Omni-Enhanced Stinkfly with Shock Rock's is gray rock armor on his chest and shoulders, along with a horned helmet and his wings changed from orange to light blue.

Big Bug[edit]

Voiced by:

Big Bug is an alternate counterpart of Stinkfly who looks identical to the Omniverse version of Stinkfly but has a different color scheme. His skin is light purple, his wings are white, and his pupils are light blue. His outfit is blue and the black parts have dark blue highlights instead of dark green. The rim of the Omnitrix symbol is golden and its energy is light blue.


Voiced by:

Ripjaws is a Piscciss Volann from the artificial water planet Piscciss, a world made of 98% water with solid matter only at its core, which houses the planet's gravitational multiplier, which holds all water and the beings on the planet. Piscciss Volanns are fish-like aliens that possess the traits of Earth's oceanic fish, with many variations but share a luminescent dangle, an ability to withstand increased amounts of pressure and swim at great speeds by combining their legs into a tail. They are also voracious eaters, able to unhinge their jaws to bite into much larger objects and even rip through steel.

He is the seventh alien in the original series. First transforming into Ripjaws to take the Krakken's eggs back from Jonah Melville in "The Krakken", Ben does not rely solely on this form due to the fact that Ripjaws needs to stay hydrated, drying quickly if out of the water for even a few minutes. This, alongside heat exhaustion, appears to be his main weakness. "In Ben 10: Ultimate Alien", Ben regains access to the form in "Perplexahedron" to escape from a water trap. This version of Ripjaws is catfish-like with the Ultimatrix symbol in the center of his chest, larger claws, and his bioluminescent lure becoming smaller.

In Omniverse, 11-year-old Ripjaws' design combines Original Series elements with Omniverse elements. His eyes remain like those in the Original Series, his eyebrows from Ultimate Alien are gone, his now-visible teeth are like those in the Original Series, his tail is bigger, he has black clothing around his left shoulder, and the Omnitrix symbol is on his left chest. His 16-year-old appearance is a mix of both versions and has a belt with the Omnitrix symbol on it. He has re-appeared in the episode "Gone Fishin''.


Voiced by:

  • Tara Strong - Ben 10, Ben 10: Omniverse (10 and 11 year old), Ben 10 (Reboot) (As Gwen in Ben's body in "Freaky Gwen Ben")
  • Charlie Schlatter - Ben 10 (As Kevin in "Framed")
  • Paul Eiding - Ben 10 (As Max in "Gwen 10")
  • Yuri Lowenthal - Ben 10 / Generator Rex: Heroes United, Ben 10: Omniverse (16 year old), Ben 10: Omniverse: Galactic Monsters
  • David Sobolov - Ben 10 (Reboot)

Upgrade is a Galvanic Mechamorph, a race that was accidentally created by Galvan scientists who tried to make Galvan B (their planet Galvan Prime's moon) habitable by binding self-replicating nanotechnology to Galvan B's minerals. When a new sentient species was born as an unexpected result, the Galvans abandoned the project and allowed the first Galvanic Mechamorphs to flourish into a civilization. He starts as the fifth alien in the original series.

Other than firing positronic plasma beams from its eye, a Galvanic Mechamorph's primary ability is to merge with technology, upgrading or changing it far beyond its original design (Hence Ben's nickname for that transformation). A good example of this can be found in the original series episode "Midnight Madness", where Upgrade merged with a helicopter fitted with a searchlight and upgraded it into a gunship with a laser cannon. Another ability Galvanic Mechamorphs possess is to form sharp projections made from their bodies as seen in the episode "Framed" when Kevin, as Upgrade, fended off Ben as Wildmutt. Ben himself performed a similar ability in the episode "Side Effects" when he merged with a motorcycle and formed spikes from its wheels. While they can control non-sentient machines, Galvanic Mechamorphs are incapable of properly controlling sentient technology. Galvanic Mechomorphs are also vulnerable to electricity and any substance corrosive to regular metals, both of which can damage their delicate internal workings. First becoming Upgrade to stop some criminals who were robbing an ATM in "Permanent Retirement", Ben's voice remained the same, but sounded more computerized due to Galvanic Mechomorphs being unable to bond with living organisms and Ben's transformation thus being incomplete. But this fact can be bent as seen in the crossover special "Ben 10/Generator Rex: Heroes United", where Upgrade merged with Rex Salazar's Nanites to greatly enhance his ally's Nanite-based machines during their fight with Alpha-Omega. Compared to his look from the original series, in "Ben 10: Ultimate Alien", Upgrade has a black and green color scheme; he still has the green stripes on the black side, but now has black stripes in the green side.

In Omniverse, Upgrade's design is the same as it was from Ultimate Alien, except he is more muscular and his Omnitrix symbol is in the middle of his eye circuit. He made his Omniverse debut in "Otto Motives" so he could upgrade Kevin's car to fight Otto.

In the Ben 10 reboot, Upgrade now has a purple/dark purple color scheme instead of black and green. The Omnitrix symbol is still on his chest, and he no longer has a computerized version of Ben's voice. In "Omni-Tricked", Ben used Upgrade to upgrade his Omnitrix, resulting with access to Shock Rock while "Omni-Enhancing" Ben's alien forms. But it removed Upgrade from the Omnitrix, which Ben eventually realizes.


Voiced by:

Techno-Bubble is an alternate counterpart of Upgrade who looks identical to 11 year old Upgrade only with blue replacing the green on the circuit pattern and soft blue replacing the white parts. His Omnitrix symbol has a gold rim and a blue faceplate and is located on his chest.


Voiced by:

  • Steven Blum - Ben 10, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters
  • Jeff Bennett - Ben 10: Alien Force, Ben 10: Ultimate Alien

Ghostfreak is an Ectonurite from the planet Anur Phaetos in the Anur system. Horrific one-eyed creatures with sharp claws and a striped spectral tail, Ectonurites normally wear a protective skin that condenses their form to resemble ghosts, their single eye moving along a black track on that skin. Ectonurites can phase through matter, possess people, turn invisible and fly. They are stronger in darkness and can be weakened in sunlight to the point of death by combustion if not wearing their second skin. As an Ectonurite's consciousness exists in even the smallest strand of their DNA, Ghostfreak is Zs'Skayr, an evil Ectonurite who added his genetic template into the Codon Stream. Due to the Anur system being closed off from the rest of the universe, Azmuth was unable to scan the DNA of another Ectonurite into the Codon Stream. In the original series, he was the ninth alien, before being replaced by Cannonbolt from season 3 after the events of "Ghostfreaked Out."

Ben first transformed into Ghostfreak to sneak out of his great aunt's house in "Permanent Retirement", admitting a sense of dread when he later uses Ghostfreak to defeat Zombozo. This would later be revealed to be the result of Zs'Skayr's consciousness influencing Ben whenever he becomes Ghostfreak. Eventually, Zs'Skayr becomes strong enough to escape the Omnitrix in the events of "Ghostfreaked Out", causing Ben to lose the ability to become Ghostfreak until the events of "Be Afraid of the Dark" when Zs'Skayr escaped death by allowing himself to be scanned by the Omnitrix. Though the Ectonurite DNA was removed from the Codon Stream by Azmuth, Ben ends up using the Omnitrix to absorb Zs'Skayr during his attack on Vilgaxia. Since then, as shown in "The Ultimate Sacrifice" when Ben attempted to use Ghostfreak on Ultimate Humungosaur, the Zs'Skayr persona has stayed inactive. In "Ben 10: Ultimate Alien", Ghostfreak's second skin looks notably different from the original series, having white skin, a bigger eye, and the Ultimatrix moved to his chest from his left chest. In "Ben 10: Omniverse" he resembles his Original Series appearance, but now has chains on his neck, wrists, shoulders, and tail. There are chain links leading from the chains on his neck and tail to the Omnitrix on his chest. He is also much skinnier than he was before and does not seem to have the Zs'Skayr personality anymore.


Voiced by:

Cannonbolt is an Arburian Pelarota from the planet Arburia, which was destroyed by "The Great One" one week prior to the events of "The Big Tick". After this, the Arburian Pelarotas were moved to Vulpin (Wildmutt's planet), then they mutated due to the pollution, evolving to be able to live there and becoming a sub-species, called Vulpinic Tortugans.

Cannonbolt is a hulking, broad-shouldered alien covered in natural armor plating, and by curling up into a ball, much like an armadillo or pillbug, he can encase himself in his armor, becoming virtually invulnerable; also, in his balled-up form, he can roll across terrain at high speeds. The drawback is that Cannonbolt quickly picks up momentum, which can make hitting more agile targets difficult, as he cannot slow down quickly; in addition, Cannonbolt's speed and maneuverability is limited outside of his ball form, owing to his bulk and high center of gravity, as he is off-balance most of the time. The first time Ben used Cannonbolt was in "The Big Tick", but it was an accidental transformation, Ben intended to turn into XLR8 to go to a fast-food restaurant; the first intentional transformation was made in the same episode to try to stop "The Great One" for destroying Earth. In "Ken 10", he now has black pants and more black around his forehead. Cannonbolt replaced Ghostfreak as the ninth alien from season 3 onward as Ghostfreak broke out of the Omnitrix as Zs'Skayr. He was originally meant to be one of the original ten aliens, but was replaced by Ghostfreak & Diamondhead in production.

In Alien Force and Ultimate Alien, Cannonbolt's armor is more curved, the stripe on his torso is gone, his eyes are now green, and the Omnitrix symbol is on his chest. While Ben possessed the Ultimatrix, he was able to evolve Cannonbolt into Ultimate Cannonbolt with his abilities advanced while his now-metallic armor has cylindrical studs that turn into spikes when he goes into his ball form. Ben first used Ultimate Cannonbolt in "Too Hot to Handle" to hold Kevin and P'andor, allowing Kevin to seal P'andor back into his suit.

In Omniverse, Cannonbolt looks like a mix between his Alien Force/Ultimate Alien and Original Series looks, but is shorter. 11-year-old Ben has Cannonbolt's Omnitrix on his forehead like in the original series. In the original series, Cannonbolt is one of the most popular aliens during the Ben 10 series.

In the reboot, his appearance is composite of his design from the original series and Alien Force/Ultimate Alien, but the Omnitrix symbol is white instead of green and he has sharp teeth. Since the episode "Screamcatcher", Cannonbolt gains the ability to become Omni-Enhanced Cannonbolt with Shock Rock's armor forming a spiky rock helmet.


Voiced by:

Rollaway is an alternate counterpart of Cannonbolt. Rollaway is quite similar to Cannonbolt, except that his color scheme is more like Ultimate Cannonbolt's, and his Omnitrix symbol and eyes are blue instead of green. His eyes are more to the horizontal side rather than diagonal. The Omnitrix symbol has a gold outer casing.


Voiced by:

Wildvine is a Florauna from the planet Flors Verdance. Florauna are plant-based aliens with tentacle like roots for legs, and carnivorous plant-shaped flaps covering their heads. Among a Florauna's abilities are extending limbs, thorns, explosive seeds, merging with other plants and understanding other plant-based beings, and regeneration from near fatal attacks. However, like any plant, a Florauna requires sunlight and water to survive. But in Ben's case, first using the form by accident in "Camp Fear" to face the Mycelium, he seems to not require sunlight and water. As a plant, his main weakness is fire. Wildvine does not appear as one of the main ten aliens of the original series.

Wildvine returns in Ben 10: Omniverse, during a training session with Rook. His 16-year-old version looks exactly the same with the exception of having four plant legs, green patches instead of "eyes" on his shoulders and the Omnitrix symbol being on a belt. 11 year old Wildvine's appearance is similar to the original series but has green patches on his shoulders.

In the reboot version of Ben 10, Wildvine is more humanoid, the fly trap design on his neck is different, there are four seeds on his back and he has legs. Since the episode "Battle at Biggie Box", Wildvine gained the ability to become Omni-Enhanced Wildvine, with Shock Rock's armor forming two blue energy limbs and gray torso armor with large venutrap-like decorations over his shoulders.


Voiced by:

Spitter is the Omnitrix's DNA sample of a Spheroid from the planet Scalpasc. Spitter is a green pufferfish-like alien who has three spikes on the top and bottom of his head. His mouth covers mostly the upper front of him, which is filled with dull colored, pointed teeth. His eyes are connected to the corners of his lips. He has black pants that partly covers his stomach, where the Omnitrix symbol is located.

Spitter can spit out a concentrated blast of slippery, conductive slime that can be made acidic. Spitter has sharp teeth and seems to have enhanced strength.


Voiced by:

Buzzshock is a Nosedeenian, from the Nosedeen Quasar (a play on Noseden and Quasar). Commonly referred to as Megawhatts (a play on megawatt and "what"), Nosedeenians are battery-like energy beings that can manipulate electricity, transmit themselves through any electrical source at high speeds, and reproduce via mitosis once they gather enough energy.

Although Ben has not revealed these powers himself, he can send green electrical shocks, unlike the regular Megawhatts, which shoot yellow; he is also slightly different from them, which are yellow while Buzzshock has green eyes and a white lightning stripe on his chest. Buzzshock was first used by Ben 10,000 in his fight with Doctor Animo.

In Omniverse, Buzzshock now has bolts on his hands, the green lightning stripe and the top of his forehead have turned to green, and the Omnitrix symbol is on his head. Buzzshock was used to save the Phil from absorbing the Megawhatts and send Phil into the Null Void by powering up the Null Void Projector.


Voiced by:

Arctiguana is a Polar Manzardill from the planet X'Nelli that resembles an iguana. Arctiguana can fire a long-range freeze ray that can freeze targets in ice, freeze molten lava, and create an icy path that he can skate across in a snowboard-like fashion. Arctiguana can survive in sub-freezing temperatures and breathe underwater. Arctiguana has enhanced strength, as shown in "Store 23" when he tackled Tetrax and dented a car roof when he landed on. As shown in "For a Few Brains More", Arctiguana can use his breath as a means of quickly hovering across the ground. If Arctiguana uses his ice breath too much, he will need to catch his breath before using it to again. In the original series, Arctiguana had three fins on his back, small spikes around his face, and gills on the sides of his head. Arctiguana wore white pants and a black open-front shirt. He wore the Omnitrix symbol on his left wrist.

In Omniverse, Arctiguana has clothing which covers most of his body. His chest is covered by a white shell. He has four pointed fins instead of three. The clothing goes all the way up to his head and his pants are fully black. The black stripes on his face do not go through his mouth anymore, instead going around his mouth. The spikes on his face are now on his chin. His gills are no longer visible. The Omnitrix symbol is on his chest. When 11-year old Ben was in 16-year old Ben's body, his voice was slightly higher.

11-year-old Arctiguana has sleeves with white cuffs and his leg is white and ending in black when it reaches his foot. His chest is not covered, so his gills are visible. His eyes are connected by the black stripe. The spikes are still on his face. The Omnitrix symbol is on his left wrist.

Ultimate Arctiguana[edit]

Voiced by:

Ultimate Arctiguana is capable of firing a long-range freeze ray that isolates ice in ice on contact. Ultimate Arctiguana can shoot large columns of ices from his cannons, and propel himself across the ground with their force.


Voiced by:

Freezelizard is an alternate counterpart of Arctiguana. Freezelizard wears a sleeved covering with white leg endings. He has blue eyes. The Omnitrix symbol is blue with a gold outer casing, and is located on his left wrist.


Voiced by:

Benwolf in the first three series or Blitzwolfer in Ben 10: Omniverse, is a Loboan from Anur Transyl's moon Luna Lobo. Besides superhuman strength and agility, Blitzwolfer can peel back his lupine snout to send out a sonic howl. Besides the color-blindness, Blitzwolfer finds it hard to resist his predatory instincts. Blitzwolfer is said to be affected by many other normal attacks and could be blinded by ultraviolet light, although there is no evidence showing this in the episode.

Ben first became Blitzwolfer, (called Benwolf at the time), when a Loboan assumed to be a "Yenaldooshi" (Navajo Werewolf) scratched the Omnitrix in the episode "Benwolf", causing its DNA to be added into Ben's selection of aliens. The result of Ben's battle leaves the Omnitrix halfway between "Scan Mode" and "Active Mode"; causing him to transform within several hours instead of instantly as he normally does, similar to how a regular werewolf transforms, considering they constantly refer to the Loboan that scratched the watch as an alien werewolf. In Ultimate Alien he wears the same clothing, he wears the Ultimatrix on his chest and the inside of his mouth is red and white. Blitzwolfer later makes his return in the Omniverse episode "An American Benwolf in London", his name coined at the time, now in a green and black suit with matching collar and wristbands and a white belt. The episode implies that the new name was hastily inspired by Wolf Blitzer. He then turns into him again briefly in the Omniverse episodes "Catfight" and "An American Benwolf in London".


Voiced by:

Benmummy in the first three series or Snare-Oh in Ben 10: Omniverse, is a Thep Khufan scanned from an unnamed Thep Khufan in "Under Wraps"; from the desert planet Anur Khufos in the Anur system. Thep Khufans are mummy-like creatures made up of many bandages that function like tentacles and can regenerate from any injury with an apparent immunity to corrodium. However, the downside is that a Thep Khufan is prone to getting wet or burned.

Snare-Oh was seen only two times in the original series; Ben debuts him in "The Return" as an accidental transformation while fighting off the Yenaldooshi and getting used to his form's abilities. Ben quickly discovers how to stretch his bandages, but has not displayed knowledge of the advanced reshaping techniques yet. He was seen again in the non-canon episode "Ken 10", where Ben 10,000 helps his son Kenny when he got stuck trying to escape from his room.

In Ultimate Alien, Snare-Oh looks the same but is much taller and now wears the Ultimatrix on his chest and the green lines on his body are now gold. In Ben 10: Omniverse, Snare-Oh is redesigned to have a new black head-dress with a golden crown; a collar/wrap-like garment over his shoulders and neck, and his Omnitrix symbol is on the waist of his tunic. He briefly debuted in "The Frogs Of War" two-part episode, while the Omnitrix was in Randomizer Mode. Snare-Oh's eyes and the gaps between his bandages glow green.


Voiced by:

Benvicktor in the first three series or Frankenstrike in Ben 10: Omniverse, is a Transylian from the planet Anur Transyl in the Anur system. Transylians are based on Frankenstein's monster, resembling patch-work humanoids with machine parts on their bodies while possessing super-strength, agility and durability. They also can generate electricity and blast it at others, adhere to metal surfaces through electromagnetism and survive in the vacuum of space.

Frankenstrike, like Snare-Oh and Blitzwolfer, looks slightly different from Dr. Viktor, with longer hair and a smaller left eye; also as the others, has green eyes instead of purple, and releases green electricity. Ben first became Frankenstrike after the Omnitrix scanned Dr. Viktor during his fight with him, Zs'skayr, and their Thep Khufan ally in "Be Afraid of the Dark". In the Omniverse series, Frankenstrike reappears in "Max's Monster". Frankenstrike has an appearance similar to the classic depiction of Victor Frankenstein's monster, appearing more patched-together.

Lightning Volt[edit]

Voiced by:

Lightning Volt is an alternate counterpart of Frankenstrike. His appearance is based on 11-year-old Frankenstrike. His skin is one-toned rather than two, he has gold transformers on his back with light blue coils and bright blue bulbs. His gauntlets are gold, the set of stripes on his pants (specifically, his thighs and calves) are gold with the rest of them being black with blue highlights. His boots are gold with three bright blue lines. He has bolts on his elbows, shoulders, neck, and chest. He has long black hair and sideburns. He has a scar on his left upper arm, right shoulder, and above his left eye. The Omnitrix is located on the light blue stripe of his belt.


Voiced by:

Upchuck is a Gourmand (from gourmand) from the planet Peptos XI. Divided into the dark-green-colored Murks and the light-green-colored Perks, Gourmands are small frog-like aliens with a very large appetite, their four strong and adhesive tongues stretching out to latch onto large objects and swallow whole. As Gourmand's mouths and various acid-filled stomachs stretch to facilitate the digestion, the latter converting the ingested matter into explosive balls of liquids that can be expelled at will with great accuracy. His name is taken from the slang term for vomit, noting the similarity of the "upchuck" energy balls he can expel while making a Burping sound (often associated with vomiting). As a defense, having done so with their ten previous home worlds, Gourmands can devour their planet as a last resort when invaded and depart for a new planet to call home.

Perk Upchuck was unlocked for Ben's use by Xylene, to save Max by destroying Vilgax's drone in "The Visitor". He was also used to eat the sub energy and defeat the Forever King. He also made an appearance in "The Secret of the Omnitrix" as a failed attempt to fight Myaxx who he at the time thought to be Vilgax. As Perk Upchuck, it seems that Ben cannot easily digest human food due to their acids being unstable for a Gourmand to digest, much to Ben's dismay when he stated "I'm a bottomless pit, yet I can't digest the good stuff!". In Omniverse, Perk Upchuck's 11 year-old appearance remains the same but his eyes and symbol have changed from white to green. His 16-year-old appearance remains the same as his Alien Force and Ultimate Alien appearance as well yet can assume a Perk-type form. Perk Upchuck has green skin, six sprout like growths on the back of his head, a dark green patch of skin on his head, light green skin on his face and belly and crooked teeth. Merk Upchuck can digest food though, as seen in "Charm´s Way".

Vomit Man[edit]

Voiced by:

Vomit Man is an alternate counterpart of Upchuck. Vomit Man looks identical to his 11- year- old dimensional counterpart, however, he has different colorations. His skin is more bluish, the white parts on his outfit are light blue and the black parts have dark blue highlights.

Atomic Monster


Voiced by:

  • Rob Paulsen - Ben 10, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

Ditto is a Splixson from the Earth-like planet Hathor.

Ditto is a humanoid child alien with the ability to clone himself limitlessly, but each clone operates independently, regardless of whether or not Ben wants them to, and is indistinguishable from the others, and somehow, he can breathe underwater. Though the clones are autonomous, they share a link with each other, with the pain of one being shared with all of the others, and the death of one clone will cause the death of the rest, which negates the usefulness of making large numbers of clones, explaining the reasons why Ben rarely creates many clones of Ditto in the limited amount of times he has appeared. However, in Omniverse, the link to pain is gone. His childlike-size is also neither stronger nor faster than his size as his build suggests, though his cloning doesn't appear to dilute his base strength. Ben activated Ditto accidentally in the episode "Divided We Stand", to fight against Dr. Animo's mutated seagull; his first intentional Ditto transformation was in the same episode to go goofing around on the beach. His name is taken from a statement that means the user has an identical thought/reason/answer compared to another person, based on the phrase "Great minds think alike.". In the event that a clone is separated from the others by a considerable distance during the Omnitrix's timeout phase, Ben is forced to remain stuck as Ditto until the copies are brought sufficiently close together.

In Omniverse, 11 year-old Ditto's head fins are white and the ones on the side are connected to his eyes. He also has two small spikes protruding from his cheeks. His fingers are now sharper and the green orbs on his shoulders are gone. He has bumps like the three on his waist on his shoulders and wrists. His neck is completely black. Ditto is about the height of an average human child. 16-year-old Ditto looks similar to his 11-year-old self. He has green fins now. His suit where it used to be black is now green, and he has green under his arms, on his shins, and around his waist.

Eye Guy[edit]

Voiced by:

Eye Guy is an Opticoid from the planet Sightra.

Eye Guy is the first alien to have been unlocked off-screen, how he was obtained is never addressed. As his name says, Eye Guy's upper-body is covered in eyes, though he has no eyes on his head, which consists of a mouth and a very large pair of bat-like ears. From these eyes, Eye Guy can fire numerous energy beams such as, ice beams, fire beams, and laser beams; the eyes can be merged to create different effects, like a freezing beam; and by merging every eye into the large eye, he can fire a stronger energy blast.

His only appearance in the original series itself was in "Ben 10 vs. the Negative 10: Part 2", where Ben was attempting to prevent the Negative 10 from stealing the Sub-Energy. He also was introduced in the first alternate opening of "Ben 10: Secret of the Omnitrix" version, in a fight with Doctor Animo.

In Omniverse, 11 year old Eye Guy is the same as 16-year-old Eye Guy who looks almost the same as the original series, with his central eye returning, but now the white circles on his pants have been replaced with green stripes and his belt is now green with a white stripe. He wears green cuffs and has less eyes covering his body although they are bigger. He has also gained eyes on his hands. He has a green belt where the Omnitrix symbol is located.

Eye Guy (Dimension 23)[edit]

Voiced by:

Eye Guy of Dimension 23 is similar to Eye Guy but he has blue-cyan shades of skin instead of yellow and dark yellow. He wears dark blue pants with light blue stripes. His Omnitrix is on his belt.

Way Big[edit]

Voiced by:

Way Big is a To'kustar, created by unpredictable cosmic storms. He is 300 meters tall with the ability to move at fast speeds and create a cosmic storm and has invulnerability, a To'kustar's only weak point is his fin, which momentarily paralyzes him when struck.

Gaining the ability to become Way Big in "Ben 10: Secret of the Omnitrix", after Azmuth decides to deactivate the "Self-destruct mode" of the Omnitrix, Ben uses this form's size to his advantage. He was also seen in the non-canon episode "Ken 10" where Ben 10,000 fights Kevin 11,000 when he defeats Kenny. In Ben 10: Alien Force and Destroy All Aliens, the spikes on his hips and shoulders are gone and he now has green eyes. Way Big has great strength as shown in Ben 10: Ultimate Alien episode "The Ultimate Sacrifice" when he easily defeated all 6 Ultimates. He also has great strength on objects his size such as in "Primus" where he threw Vilgax into orbit, despite him being his own size. Also in "The Widening Gyre" he threw the garbage monster into the sun, despite it being relatively bigger.

In "Ben 10: Omniverse," Way Big has his new design similar to his original. He also now speaks in a distorted voice with a Japanese accent. He was temporarily erased from the Omnitrix as a result of Eon's time ray.

Ultimate Way Big[edit]

Voiced by:

Ultimate Way Big is 600 meters tall (2 times taller than Way Big), stronger, has a spike sticking up from both his cheeks and his body is blue, red, and white. His head looks similar to Alien X or Ditto. He was used only once to battle in the episode "The Ultimate Enemy, Part 2". He can launch cosmic discs from his hands. This is also the last Ultimate form Ben used. He has increased strength, durability and now has the power of flight. However, his giant size prevents him from fighting in small spaces and he can be harmed by Diagon's magic acid rain. Ultimate Way Big can also shoot lasers at the opponent like the regular form. He is the largest alien in the entire Ben 10 series.


Voiced by:

Eon looks like the regular Eon, only he lacks the helmet and appears younger. The Omnitrix is hidden underneath his cloak on his right pectoral. The original Eon forced Ben to transform into his form of Eon once his DNA was added to the Omnitrix in Ben 10: Race Against Time. This alien is non-canon to the animated show, as the character of Eon is instead an alternate counterpart of Ben as opposed to an alien.

Introduced in Alien Force[edit]

This list includes the aliens that were introduced to the franchise through the Alien Force installment.


Voiced by:

  • Dee Bradley Baker - Ben 10: Alien Force, Ben 10: Ultimate Alien, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters
  • David Kaye - Ben 10: Omniverse 2

Swampfire is a Methanosian from the planet Methanos (referring to methane), a living plant alien with superhuman strength and ability to create fire from the methane produced by his body. Besides being able to control plant life and producing seeds that quickly grow into vines, Swampfire also has a vast regenerative ability that allows him to alter his own body. This expresses itself in such ways as tunnelling underground in vine form, growing his feet to root himself into the ground, healing his lost limbs or producing other ones; this ability makes him almost indestructible. However, Swampfire is more vulnerable than Heatblast because he can be frozen for periods of time, unlike Heatblast, who is completely invulnerable to cold. He first appeared in the pilot episode of "Ben 10: Alien Force", in "Ben 10 Returns: Part 1" after the Omnitrix had recalibrated, to fight the DNAliens, Forever Knights and defeat Kevin, and became the first alien ever to be used in Alien Force.

In Ben 10: Omniverse, his design is changed and has five fingers on his hands. Swampfire's skin is now olive green, and his arms are larger. The red petals on his shoulder, along with the green thorns on his body, are thinner and longer. His torso design has changed, splitting the black parts on his waist into two. The Omnitrix symbol has also moved from his chest to his stomach. Swampfire underwent a transformative phase during the events of "Charmed, I'm Sure", appearing more muscular, having a different colour scheme, a red/orange/yellow coloured face and a hood-like formation on his neck. The Omnitrix was still on his stomach. An alternate version of Swampfire known as Mr. Mucky (used by Ben 23) had his design released, giving him a teal body, with blue and white petals, blue eyes, and a blue Omnitrix with a gold rim, although the design was never used in-show.

Ultimate Swampfire[edit]

Voiced by:

As Ultimate Swampfire, he is a tree-like version of himself with a Heatblast-like face and blue gooey shells containing an organic, blue-colored napalm kerosene gel-like solution, containing a highly flammable substance that is used to create blue flames, which are more powerful than the normal, and when he puts his hands together, he creates a huge fire blast; he can also shoot fire bombs. Ultimate Swampfire cannot regenerate himself, this limitation was offset by his body being made of petrified wood which is more resistant to damage. Ben used Ultimate Swampfire on the first time in the Ben 10: Alien Force's series finale "The Final Battle: Part 2", to fight Vilgax, and being the first ultimate form used by Ben.

Echo Echo[edit]

Voiced by:

Echo Echo is a Sonorosian (a play on sonic and sonar) from the planet Sonorosia (from the word sonoros in Latin, meaning sound). Sonorosians are living sound waves, and because of such, Echo Echo's appearance is a containment suit.

Echo Echo is a small white silicon-based alien whose body is a living amplifier, with headphones connected to square appendage resembling an MP3 player in his back with a port on it decorated with a binary digit situated like the number 10. He can scream at ultrasonic frequencies, capable of overloading machinery and stopping projectiles in mid-flight; he can also use echolocation; and channel vibrations to enhance his power and transmit sound waves through speakers. He used to speak with a very high-pitched and tinny voice, but became slightly lower, he also has the ability to duplicate himself, but unlike Ditto, the clones are not linked in any way and can revert even if all duplicates are not re-integrated, which splinters the original's personality.

The first time he appeared was to fight the Forever Knights' dragon robot in "Ben 10 Returns: Part 2".

In Ben 10: Omniverse, Echo Echo is fatter and shorter, with stubbier legs. On the back of his MP3 player, instead of two plug-like holes, there is now the number ten. His eyes appear puffier and the Omnitrix symbol is now on his forehead.

Ultimate Echo Echo[edit]

Voiced by:

As Ultimate Echo Echo, Echo Echo is blue, taller, and has longer arms. His mouth doesn't move when he talks, but can still be opened nonethelss. Unlike his regular form, Ultimate Echo Echo cannot duplicate himself anymore (As confirmed on the Cosmic Destruction site), but he can now shoot sonic screams and sonic waves from discs and levitate. Ben used Ultimate Echo Echo for the first time to fight the Necrofriggian colonizers, and to help Gwen and Kevin with the traps of the temple in "Map of Infinity". In Omniverse, Albedo takes on a new Ultimate Echo Echo form, which is dark blue and has red disks; he also has red wires on his limbs.


Voiced by:

  • Dee Bradley Baker - Ben 10: Alien Force, Ben 10: Ultimate Alien
  • Jeff Bennett - Ben 10: Alien Force (As Azmuth in "Primus")
  • Ashley Johnson - Ben 10: Ultimate Alien (As Gwen in "Inspector 13")
  • Michael Emerson - Ben 10: Ultimate Alien (As Alpha in "Ben 10 / Generator Rex: Heroes United")
  • John DiMaggio - Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

Humungousaur is a Vaxasaurian (vaxa is an Icelandic word which means grow and sauria is a clade of lizards, so it literally means "growing lizard") from the planet Terradino (terra dino means "terrible land" in Latin).

Humungousaur is a 32 foot tall humanoid dinosaur-like alien, and one of Ben's current favorite aliens; he possesses great strength and thick skin that provides vast resistance to injury. He can increase his own body size and mass to grow up to 60 feet in height. His strength increases as he grows, and his dinosaur-like features become more pronounced, growing Stegosaurus-like plates on his back, a forehead crest, and tail spikes; Humungousaur can also survive in space for at least a few minutes.

Ben used him for the first time to fight a swarm of DNAliens and a Highbreed in "Ben 10 Returns: Part 2".

In Ben 10: Omniverse, Humungousaur wears black briefs and a green sash across his chest containing the Omnitrix symbol. He now has a shorter tail. His natural predator is Tyrannopede.

He will appear in the reboot, mostly resembling his original form, but with the spines he develops when grows from Alien Force and the tail mace of Ultimate Humungousaur.

Ultimate Humungousaur[edit]

Voiced by:

As Ultimate Humungousaur, he is now an ankylosaurus-like creature who reaches a maximum height of 20 feet tall. Unlike his original form, Ultimate Humungousaur cannot grow at all. He is a green, armored creature with grey horns, arms, chest and back, a mace in his tail, and a large, spiked shell. He can convert his hands into bio-Gatling guns that shoot kinetically unstable bone fragments as missiles. Ultimate Humungousaur was first used by Albedo in "The Final Battle: Part 1" to fight Ben as Humungousaur, being the first Ultimate Form used in the Ultimatrix. Ben first uses him in the Ben 10: Ultimate Alien episode "Too Hot to Handle" to fight P'andor and his minions (Surgeon, Hammer and Buzz). He is shown to be strong enough to knock over Way Big in "The Ultimate Sacrifice". In Omniverse, Albedo's version now has tan skin instead of green, appears more like a cyborg, and his bio-gatling guns now rotate when fired similar to certain guns.


Voiced by:

Dino-Mighty is an alternate counterpart of Humungousaur. He looks the same as his dimensional counterpart, except he has greyish-cyan skin instead of brown, a light greyish-cyan chest, blue eyes, and a blue sash. The waistband of his briefs is soft blue. His Omnitrix is on his sash, which resembles Humungousaur's sash but is blue.


Voiced by:

Jetray is an Aerophibian (derived from aero for air and amphibian) from the planet Aeropela.

Jetray is a manta ray-like alien with horns extending from the center of the eyes and two wings attached to his arms. He can fly and swim at supersonic speeds, as fast as XLR8 (or possibly faster), accelerate to speeds greater than light, and shoot neuroshock blasts through his eyes and tail. He also doesn't need to breathe, enabling him to easily travel through water and space. Jetray first appears to chase Alan Albright in "Everybody Talks About the Weather". Ben sees him as his mode of transportation, much like Stinkfly when he was younger, but elected to use aliens more favorable than Jetray or his car. Jimmy Jones, who exposed Ben's identity to the world, mistook Jetray's name as Jeffrey. Jetray did not appear in Omniverse. but was considered a heavy hitter when Ben upgraded Kevin's car.

Big Chill[edit]

Voiced by:

  • Dee Bradley Baker - Ben 10: Alien Force, Ben 10: Ultimate Alien, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters Ben 10: reboot

Big Chill is a Necrofriggian (necro- meaning death, and -frigid meaning very cold) from the planet Kylmyys (the Finnish word for coldness). Moth-like creatures who can fold their wings to resemble hooded figures, Necrofriggians can become intangible and freeze an opponent in various ways, one of which utilizes intangibility to freeze anything that they pass through.[note 1]

While possessing superhuman strength and resistance to extreme temperatures, Necrofriggians are unable to use their intangibility against opponents with the same ability. Necrofriggians can asexually reproduce once every 80 years: they build a large nest made of digested metal, where their eggs will hatch and the babies feed from metal. They first eat metal from the nest before instinctively feeding on solar plasma until they mature and go to their home.

Ben first became Big Chill in "Kevin's Big Score" to chase down Kevin after he stole the Rustbucket II. Later, due to the Nercofriggian reproduction cycle, as shown in "Save the Last Dance", Big Chill overtook Ben's personality to carry out the process, but Ben didn't remember anything he did as Big Chill during this cycle, like eating metal and having 14 babies.

In Omniverse, Big Chill is larger and barrel chested with bigger wings and the Omnitrix symbol on a green colored waist belt. With his hood on, he resembles a hunchback.

Big Chill's natural predator is the Psycholeopterran, one notable member being Hypnotick.

Ultimate Big Chill[edit]

Voiced by:

As Ultimate Big Chill, he is red-skinned with flame design on his wings, antennae and around his eyes, which causes his face to resemble a mask; his voice is more gravelly than normal and is deeper-toned. In this state, Ultimate Big Chill can create "ice flames", flames that turn into ice. They consume the heat of whatever they touch and freezes them much faster than normal. He was first used in "Hit Em Where They Live", to fight Vulkanus and his Pickaxe Alien army.


Voiced by:

Freezeghost is an alternate counterpart of Big Chill who resembles 16-year-old Big Chill with a different color scheme. His wings, eyes, chest, and antennae are light blue, he has a white belt with thin gold straps and the Omnitrix symbol in the middle, and his neck and head are white with light blue specks.


Voiced by:

Chromastone is a Crystalsapien (a combination of crystal- and -sapien). His home planet is Petropia, which he shares with Diamondhead[note 2]

Chromastone is a silicon-based alien with super dense skin and several magenta crystals protruding from his torso. He has great strength, the ability to fly, and indestructible crystal skin. He can absorb most kinds of energy like a conductor and channel it into multicolored laser blasts. In battle, Chromastone can let energy pass harmlessly through his body via refraction or blast it back at the foe; he can seemingly produce blasts without having to absorb energy, though it may be due to absorption of radiant or ambient energy. However he is unable to absorb energy when not expecting it or is too weak to do so. Ben first used Chromastone to stop the zombified schoolgirls in "All That Glitters".

During the episode "Vengeance of Vilgax: Part 2", Vilgax destroyed Chromastone using his Taydenite sword, but the alien's remains reformed into Diamondhead. He hid himself until the time came for him to restore Petropia shortly after Vilgax's destruction of the planet. It is believed that Sugilite is the guardian of the Petrosapiens, and that he was created as a backup system for the planet in case the planet was destroyed. Although Chromastone became accessible again after the events of "The Secret of Chromastone", Ben didn't use him until the pilot episode of Ben 10: Ultimate Alien to fight Bivalvan, being very surprised he still had access to the form.

In Omniverse Chromastone is relatively unchanged except for his crystals bring slightly taller. He was first seen being used in Trouble Helix, when Khyber broke into the Plumbers' base for data while Ben was helping Driba and Blukic test energy weapons. In "A New Dawn", Chromastone takes on a new appearance. He now wears a green jumpsuit with some white details, has spikes on his shoulder, arms, head, and legs, and wears green gauntlets on his wrists and legs. His chin resembles a mouth guard and is now magenta. The Omnitrix symbol is now on his right pectoral.


Voiced by:

Brainstorm is a Cerebrocrustacean (a play on cerebrum and crustacean) from the planet Encephalonus IV (a play on encepha-, a prefix referring to the brain), the previous three Encephalonus planets were destroyed because primitive Cerebrocrustaceans attempted to harness the storms surrounding their planets. Cerebrocrustaceans are supermassive intelligent crab-like creatures able to perform complex calculations and use electric attacks by using their pincers or opening the exoskeleton plates that cover their brains. They can also levitate, create force fields, and cause a storm just by thinking, but their intellect makes the Cerebrocrustaceans selfish and eccentric. He has an IQ of 10^30 or one nonillion.

As Brainstorm, with the Omnitrix/Ultimatrix symbol in his cephalothorax, Ben speaks with much greater diction and with a British accent. He was first seen in "Pier Pressure", to face Ship, but was an accidental transformation. In Omniverse, Brainstorm has black and green stripes; one in the center of his head, while the other goes under him. He now speaks with a Swedish accent.


Voiced by:

Spidermonkey is an Arachnichimp (a play on arachnid and chimpanzee) from the jungle planet Arahnascimmia (which is also called "Arachna"). Dwelling in tree tops to avoid the giant predators on Arahnascimmia's surface, Arachnichimps are four-eyed, four-armed blue monkey-like aliens with the ability to produce strong webbing from their tails.

Since first using the form in "What Are Little Girls Made Of?" to fight Verdona, Ben uses Spidermonkey as one of the most used aliens for being able to execute nimble hand-to-hand fighting, though he has gotten tangled in his webbing on occasion. Despite not being a strong form, Spidermonkey's wiry frame is suitable to evading danger. In Ben 10: Omniverse, Spidermonkey's design was substantially changed: Having two extra eyes, spiky hair, gray stripes, his nose has moved to his forehead, and two green sashes going across his chest where the Omnitrix is located. He first reappears in "The More Things Change: Part 1", for fighting the Crabdozer, Heatblast's natural predator.

Ultimate Spidermonkey[edit]

Voiced by:

As Ultimate Spidermonkey, he is a bulky purple gorilla-like being with four sharp spider legs sprouting from his back, and he had lost his tail and his extra arms. In this state, Ultimate Spidermonkey is stronger and can spit stronger webs from his mouth in a larger amount, which are waterproof. He was first seen in the pilot episode of Ben 10 Ultimate Alien, to fight Bivalvan, being the first ultimate form of Ben 10: Ultimate Alien. In "For a Few Brains More", Albedo uses another form of Ultimate Spidermonkey that has six arms, six eyes, darker fur/skin and spikes on his chin.

Mr. Monkey[edit]

Voiced by:

Mr. Monkey is an alternate counterpart of Spidermonkey. He looks similar to Spidermonkey but he has white fur, bluish grey skin, light blue eyes and blue sashes. His Omnitrix symbol is gold with light blue energy.


Voiced by:

  • Dee Bradley Baker - Ben 10: Alien Force, Ben 10: Ultimate Alien, Ben 10: Omniverse
  • James Remar - Ben 10: Alien Force (As Vilgax in "Primus")

Goop is a Polymorph (a word meaning "many shapes") from the planet Viscosia (a play on viscosity).

He is a 200-pound viscous life form, a shape-shifter made of green goo, which is also slightly acidic, controlled by an anti-gravity generator developed by the Galvans, that resembles a small flying saucer (which is where his voice comes from), and also has sharp edges. This device allows him to take any shape and levitate; however, if the ship and the slime are separated by even a short distance, the slime will become inert until the ship recollects it, and also it has a button that shuts off the anti-gravity.

In "Deep" Goop used his anti-gravity projector to keep the Piscciss planet's gravity, and he left his generator there, even after Ben turned back to human form. Dwayne McDuffie says the Ultimatrix will generate another anti-gravity projector; he also said that the original species of Goop did not use a projector.

Goop first appears to battle a Techadon in "The Gauntlet". In Ben 10: Omniverse, Goop has an amoeba-like shape; and the anti-gravity projector is redesigned, where the Omnitrix symbol is now on the top of the projector; also when Goop speaks now, a crackle of static is heard at the end of each line as if he is speaking through a walkie-talkie. An alternate version of Goop known as Muck-A-Muck (used by Ben 23) is known to exist, although its appearance was never shown.

Alien X[edit]

Voiced by:

  • Yuri Lowenthal - Ben 10: Alien Force, Ben 10: Ultimate Alien, Ben 10: Omniverse

Alien X is a Celestialsapien (from the word celestial and sapien, the Latin word for wise), native to the Forge of Creation, hidden from everyone except Paradox and whoever possesses the Map of Infinity. Celestialsapiens have black humanoid bodies with tiny white stars on their skin. Celestialsapiens can manipulate space, time and reality. As a result, they can smash through planets, cross solar systems in milliseconds, teleport, levitate, generate force fields, regenerate body parts, deflect energy blasts, duplicate, and telekinetically control motion and force. Though omnipotent, each Celestialsapien is normally in an inactive state of internal debate due to having a dual consciousness, one being a personification of love and compassion while the other embodies rage and aggression. Unless able to achieve a balance between its two personas, a Celestialsapien normally remains still for long periods of time. Their inability to agree greatly inhibits and weakens Celestialsapians, thereby keeping them from constantly having full omnipotence and can also physically make them more vulnerable to others of their kind. In fact, it has been demonstrated that having multiple decisions to make can overwhelm or confuse a Celestialsapian and weaken them further. However, the personas do have some common ground, like a mutual hatred for Paradox with an unknown cause, allowing Paradox to exist on the condition that he stays "500 light years" away from any Celestialsapien.

Alien X is the tenth alien that Ben becomes after his Omnitrix was reformatted when he repairs a broken dam in "X = Ben + 2", becoming a metaphysical mediator for Alien X's personas, Bellicus and Serena, to settle their debates as their Voice of Reason, but his inability to get the two personas to agree makes Ben unable to physically move as Alien X. Since that point, he views the use of the form as a major risk despite acknowledging Alien X as one of his most powerful aliens.

After getting the Ultimatrix, Ben had a security protocol installed that locked the Alien X option to ensure that Alien X would not be used if the Ultimatrix fell into the wrong hands and he would not accidentally turn into him. Gwen and Kevin have the keys that undo the protocol. Ben had the lock undone in a failed attempt to get Bellicus and Serena to help him find the Forge of Creation and stop Aggregor. Paradox ended up getting Ben out of his Alien X form after the boy's attempt to reason with the two personalities failed, prior to them realizing Paradox's presence and were about to vaporize him upon a quick mutual agreement.

Alien X returned in Ben 10: Omniverse, in "So Long, And Thanks For All the Smoothies", having a more pronounced chin and being more muscular. Though saving the universe from the detonated Anihilaarg is beyond them, Serena convinced Bellicus to let Ben use their power to remake the universe with everyone unaware of the slight changes. However, this results in the events of "Universe vs. Tennyson" as the reboot was unsanctioned, with the ordeal at court ending with Ben gaining full control of Alien X by convincing Bellicus and Serena to focus solely on their debates. As a result, Ben can fight as Alien X without the risk of being immobilized.


Voiced by:

Lodestar (a play on lodestone, a magnetic rock, piece of magnetite) is a Biosovortian.

Lodestar has a floating metal head which levitates between his pointed shoulders, which is held in place magnetically, and his mouth doesn't move, has crab-like claws just like the claws on his feet. He has magnetic powers, being able to create magnetic fields, enabling him to repel, attract, emit magnetic pulses, and control metallic objects; and also attack using magnetism waves; he has an armored hull, very tough, but does not support a huge explosion, on the other hand, he can regenerate himself; and also he can make a shield and fly.

At the end of "War of the Worlds Part 2" when the Omnitrix resets itself after Ben reprograms the DNA of the Highbreed, it had unlocked new aliens, Ben transformed into him, but he wasn't seen, just his hologram. His official debut was in "Simple" to defeat the Red Army.

His Ultimate Alien debut was in "Video Games" in a failed attempt to fight the Stalker.

In Ben 10: Omniverse, Lodestar's design is relatively unchanged. His head is more skull-like with yellow horns, similar to Jetray's; also he now can move his mouth when he talks. His legs have less black on them, the yellow going up past his knees, and the glow around his head is now green.


Voiced by:

  • John DiMaggio - Ben 10: Alien Force, Ben 10: Ultimate Alien, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters
  • Jeff Bennett - Ben 10: Alien Force (As Azmuth in "Primus")
  • Ashley Johnson - Ben 10: Ultimate Alien (As Gwen in "Inspector 13")
  • Dwight Schultz - Ben 10 (Reboot) (As Dr. Animo in "Animorphosis")

Rath (a play on "wrath") is an Appoplexian (a play on apoplexy, an informal synonym for extreme anger) from the planet Appoplexia. Resembling muscular, humanoid tailless tiger-like aliens, Appoplexians suffer from aggressive temperament and decreased reasoning power, having a need to fight anything that breathes regardless of whether they fight their own friends. Their mannerisms and speech are reminiscent of a professional wrestler speaking in third person, saying "Lemme tell ya somethin'!" then followed by the full name of whoever they are talking to. In addition, each Appoplexian has two retractable claws on their wrists that can generate shockwaves when driven into objects. They are durable to the point of surviving in space for short periods and taking a powerful laser cannon blast at point blank range without even flinching. However, other than their tempers, Appoplexians have acute aquaphobia.

Ben first becomes Rath in "Con of Rath" (a play on Star Trek II: The Wrath of Khan) when the crown prince Tiffin sets off the Omnitrix's circuit, and caused it to keep Ben in that state for the whole episode until the Tiffin leaves, and when Ben found out that Kevin knew about it all the time, he turned back into him to beat Kevin up. Though being Rath alters his mind (to the point where he tries harming Captain Nemesis for cheating in a race), he is one of Ben's more powerful alien forms due to having enough physical agility and strength to easily lift objects far larger than him and pummel most enemies with ease. Both Kevin and Gwen find Rath the most amusing of Ben's aliens, often laughing behind his back or out of Ben's hearing range while he is transformed into Rath.

In Omniverse, Rath's appearance is unchanged except for having different-shaped black eyebrows. He reappears in "It Was Them" to fight Dr. Animo's giant ants. It's later revealed that, unlike other Appoplexians, Rath does not wear any clothing, which is odd, considering that the Omnitrix usually adapts the user's clothing to the alien they turned into. During the events of "Secret of Dos Santos", due to Skurd's tinkering with the Omnitrix, Rath ended up speaking in Spanish and wearing luchador garb.

Rath was confirmed to exist in the reboot series during the episode "Animorphosis", as Dr. Animo temporary transformed himself into an Appoplexian after injecting himself with genetic material he extracted from the Omnitrix. Despite the transition, Animo spoke normally throughout the duration of his transformation.

Ultimate Rath[edit]

Voiced by:

Ultimate Rath: in "Ben 10: Omniverse" wears attire in homage to Kraven the Hunter of the Marvel comics universe, has white fur, dark pink skin, two claws instead of one and is able to speak normally. It is a form exclusive to Albedo that he first used in "Malgax Attacks".


Voiced by:

Nanomech is a Nanochip/human hybrid called a Nanomechion, which are known for being part drone, part human. This race comes from hive planets.

He is an inch tall being, but it's worth noting he is drastically different from the source alien, which are bug-like, while Nanomech takes more on a humanoid shape. He has a crest-like growth on his head. He has the ability to fly with his wings for added maneuverability, which glow when he flies; shoot energy balls from his hands and his eye, shoot mechanical cables from his body; and also he is the opposite of Humungousaur, Nanomech can change his body size to a microscopic size to adapt to any situation, but can't grow to any bigger size. However, being a part of the chips' hive mind renders him vulnerable to the Queen's link to the other chips; however, unlike the drones, he retains his individuality.

In Ben 10: Alien Swarm, Nanomech was unlocked by scanning the Nanochips. He was used to enter Victor Validus's brain and battle The Queen; Ben destroyed her and thus the entirety of the chips, freeing everybody from their control.

He first reappears in the Ben 10: Ultimate Alien episode "Video Games", with his appearance and voice changed; Nanomech would be in a supposed video game he was going to appear in, but Nanomech was regarded too small for the video game. Later in the same episode, he was used to tear apart the insides of Will Harangue's robot.

In Ben 10: Omniverse, he now has a design that combines aspects more from Alien Swarm. He no longer has his circuits, and has different wings and a more robotic voice tone, he has four very small eyes around his face and his Omnitrix symbol is now where his eye used to be. He is the smallest Ben 10 alien. An alternate version of Nanomech known as Teeny-Weeny (used by Ben 23) is known to exist, although its appearance was never shown.

Introduced in Ultimate Alien[edit]

This list includes the aliens that were introduced to the franchise through the Ultimate Alien installment.

Water Hazard[edit]

Voiced by:

  • Dee Bradley Baker - Ben 10: Ultimate Alien, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

Water Hazard is an Orishan from an unknown planet in the Andromeda Galaxy. He has a red cape type "shell" that covers his head. He has the ability to blast water from his hands and is able to absorb moisture from creatures. Ben obtained Water Hazard by scanning Bivalvan. Bivalvan was on Aggregor's ship along with the genetic donors of Ra'ad, Andreas, Galapagus, and P'andor. In "Too Hot to Handle", Ben decided to use the diplomatic approach with P'andor and transformed into Water Hazard, pretending to be Bivalvan; though unsuccessful in negotiation, Ben duped P'andor into thinking he was Bivalvan. In Omniverse, Water Hazard has four eyes, a retractable visor like XLR8, and barnacles on his body.


Voiced by:

AmpFibian is a blue jellyfish-like alien called an Amperi with four tentacles from an unknown planet in the Andromeda Galaxy. He has the ability to generate and drain electricity from his tentacles; can sense the electrical pulses in the minds of other life forms, allowing him to read their thoughts, though it seems that Ben doesn't know how to do this; turn intangible, stretch all of his tentacles, and absorb and redirect energy beams. AmpFibian can also travel through air, water, and electronic currents by turning his body into electricity. However, if he is using electricity while entering water, he will electrocute himself.

Though unintentionally first used in "Fused", where Ra'ad entered Ben's body during the DNA scan in a freak accident in an attempt to take the Ultimatrix offline to evade Aggregor to track him down; which explains that the first time, he had blue eyes and had a voice that sounds just like Ben's but it has the effect of being phase-shifted because of Ra'ad. The first intentional use was in "Deep", to breathe under water on the planet Piscciss, where from this time he has green eyes.

In Ben 10: Omniverse, AmpFibian didn't change too much except for his pointed tentacles, black eyes with green pupils, and the Omnitrix on his face.


Voiced by:

Armodrillo is a Talpaedan (a play on talpidae, a name for a family of mammals that includes subterranean animals such as moles) scanned from Andreas in "Andreas' Fault"; from the Andromeda Galaxy planet Terraexcava (from Portuguese Terra Excava means "Excavated ground").

Armodrillo is a strong armored robotic armadillo-like alien with a head that looks similar to a Corinthian helmet. He has an invulnerable armor that protects him from most kinds of damage; has two jackhammer-like arms, that allows the ability to drill into the ground, or form jackhammers that cause tremors, shock waves and earthquakes; he can also turn his hands into actual drills, and launch objects from his hands by using hydraulics. Despite all this mechanical appearance, he is biological and the armor and drills are natural. Ben first used Armodrillo to defeat Computron and the robots from the Dimension 12 released by Captain Nemesis in "Hero Time".

In Ben 10: Omniverse, his design now includes a different head shape, bolts on his shoulders and has a metal circle on top of his head; a tail and fingers with horizontal lines. He is also one of Ben's most recurring transformations, whether it's intentional or accidental.


Voiced by:

Toolbox is an alternate counterpart of Armodrillo. He is almost the same as Armodrillo. But, instead of yellow and dark grey, he is colored mild blue and gold.


Voiced by:

Terraspin (a pun on the turtle terrapin) is a Geochelone Aerio (a play on Geochelone, a turtle found in Africa, Asia, and the US, and "Aerio" a play on air) scanned from Galapagus in "Escape From Aggregor"; from the Andromeda Galaxy planet Aldabra (a pun on the island of the Aldabra Group).

Terraspin is a turtle-like alien with holes in chest, and big flat flipper-like arms with retractable claws that can be used as fingers. He has the ability to retract his head into his shell, where an opening in the shell serves as a viewfinder, his fins become triangular and his legs combine into a similar triangular shape, he blows a powerful wind from the holes in its shell while also using his triangular shape arms as propellers; allowing varied powers such as creating winds and spinning himself at high-speed; he uses the blowing ability to fly. Terraspin also has super-human strength, and his species is impervious to mana.

In Ben 10: Omniverse, Terraspin now has six holes instead of eight, has spots on his legs, toes and shoulders. Also his skin is now green instead of a tan/brown, and he has gained toes on his feet.


Voiced by:

  • Dee Bradley Baker - Ben 10: Ultimate Alien, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

NRG is a Prypiatosian-B (a play on Prypiat, a city that was evacuated due to the Chernobyl disaster) scanned from P'andor in "Too Hot To Handle"; from an unknown planet in the Andromeda Galaxy.

NRG is a radioactive energy being with a Russian accent, encased within an oven-like invulnerable containment suit that contains his radiation. When released, he is able to shoot energy beams and can create intense heat, enough to create the intensity of a nuclear bomb; he is capable of becoming intangible, so he cannot be touched except by the material his armor is made of. His armor is so tough that it can only be broken with a sharp piece of Taydenite; but even trapped in the armor he can still use part of his power when it is released; he can shoot energy beams through the holes of the viewfinder, and can generate intense heat, being able to turn his armor red hot and melt solid rock; and has super-human strength. Ben first transformed into NRG by accident to defeat the 10-year-old Ben as the original Heatblast in "The Forge of Creation".

In Ben 10: Omniverse, his new design includes a handle-like formation on the top of his head, and has bolts on his body. Because of the handle, his armor can be opened more easily. His true form wears two straps, a belt, two wristbands on both arms and two knee braces on both legs; and he has another Omnitrix symbol, in his belt. This "outfit" is actually a lower level containment field. Before the Omnitrix times out, Ben must return to the protective suit, but the Omnitrix will replace it, as seen when he transformed into Water Hazard in "The Frogs of War Part 1" from outside the suit.


Voiced by:

Fasttrack is a Citrakayah (a play on Citroen) from the planet Chalybeas (From "Chalybeate" mystical waters containing salts of iron possessed by the extinct "Chalybes" community in accordance to the enchanted strength element). Fasttrack is a blue and black alien with two mask-like projections on his eyes. He moves at high speed like XLR8, and also has enhanced strength as he was strong enough to carry both Hulka and Tack without losing any speed, however, he doesn't easily stop from running, probably because he can't manipulate friction as XLR8 does. He made his first on-screen appearance in "Basic Training" where he saves Tack and Magister Hulka from a malfunctioned grenade. He has the ability to run through the time and space barrier and he is stronger than XLR8. Like Jetray, Fasttrack did not appear in Omniverse, but he was mentioned several times when Ben tries to use a fast alien but turns into another one instead.


Voiced by:

ChamAlien is a Merlinisapien from an unknown planet, which is said to be almost impossible to find as it is camouflaged. Lizard-like with three eyes, usually each a different color (except for Albedo's version which are all red), ChamAlien can change color to camouflage himself with only his shadow visible; he can also grow a spike out of the end of his tail; in addition he is very agile, flexible, fast, slippery, has great strength, and can also stick to surfaces with his great physical adherence.

Ben obtained ChamAlien from the one of the last living Merlinisapiens, designated "Prisoner #775", after the events of the titular episode. While transforming into him for the first time, Ben called the form "Overkill" because Gwen said earlier in the episode about the fact that he shouts out his alien forms' names. ChamAlien was not seen or mentioned in Omniverse.


Voiced by:

Eatle is an unknown species from an unknown planet that resembles an armored robotic humanoid alien with a Rhinoceros beetle-like horn and a big metal mouth.

He has sharp fingers, and super-strength, allowing him to eat big pieces of any material; and has powers similar to Upchuck, he can eat many things, and convert them into powerful laser beams that he shoots from a slot on his horn; he can also use the horn as a battering ram and possess a durable hull; however Eatle has a blind spot due to his eye placement, making him easier to sneak up on. He briefly made his debut in "A Knight to Remember", on a short failed attempt to fight Vilgax.

In Ben 10: Omniverse, Eatle was also re-designed: his look is not robotic or humanoid and now is similar to a Japanese rhinoceros beetle; he now has a green stomach, and he can also move his mouth.


Voiced by:

  • Dee Bradley Baker - Ben 10: Ultimate Alien, Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters
  • Ashley Johnson - Ben 10: Ultimate Alien (As Gwen in "Inspector 13")

Clockwork is a Chronosapien (Chrono meaning time, and sapien from the Latin wise), a race of mechanical lifeforms that are steampunk in design and speak in German accents. Capable of traveling through time and space, Chronosapiens can produce time rays that can either age or regress their targets or slow everything down around them. They can display events that have happened in the past by rotating the keys on their heads, which produces a light that create holographic images of past actions. The use of a Chronosapien's powers creates a ripple effect which can be sensed and reversed. According to Ben 10,000, the Chronosapien race went rogue during a Time War occurring within the Omniverse series.

Clockwork indirectly debuted through Ben 10,000 in "Ben 10,000 Returns"; he was used to send Eon to the past and destroy the Hands of Armageddon with the help of 16-year old Ben as Way Big. He appears later in "Inspector 13", when the Ultimatrix malfunctions, causing Gwen and Kevin to transform into the Ultimatrix aliens. Clockwork makes his official debut in "Catch a Falling Star" to fight Overlord.

In Ben 10: Omniverse, Clockwork's design is relatively unchanged except for having a larger body and a more wind up-like shape on the protrusion on his head. During the events of "Ben Again", trapped within his 11 year old body, Ben briefly accessed a younger version of Clockwork. 11-year-old Clockwork looks very similar to older Clockwork, but his face looks more like an emoticon. He also has a white shirt design with a black stripe on it, much like 11-year-old Ben. One time, Techno-Bubble took over Clockwork's own body.

Jury Rigg[edit]

Voiced by:

Jury Rigg (a play on Jury rigging) is a 1-foot tall gremlin-like alien able to disassemble and assemble any machinery in quick time, though Jury Rigg is prone to manic needs to break and fix. He was first introduced in "The Eggman Cometh" three times: the first two with Ben unable to control himself as Jury Rigg before managing to muster enough willpower to fully utilize Jury Rigg's abilities in destroying Dr. Animo's machine and rebuild it with an opposite function. In Ben 10: Omniverse, Jury Rigg wears a 1900s aviator's suit, which includes goggles and a scarf that further his Gremlin-like features.


Voiced by:

  • David Kaye - Ben 10 / Generator Rex: Heroes United, Ben 10: Omniverse

Shocksquatch (a play on electric shock and Sasquatch) is a Gimlinopithecus (a play on Robert Gimlin and Gigantopithecus) from the planet Pattersonea (A play on Roger Patterson). Gimlinopithecuses are Yeti-like aliens with great coordination and strength, they have small metal plates all over their bodies that can conduct electricity. Their only weakness is being insulated, making their ability to conduct electricity useless. He speaks with a Canadian accent.

Ben briefly became Shocksquatch in the special crossover "Ben 10/Generator Rex: Heroes United" due the Alpha Nanite hacking the Ultimatrix a couple of times.

In Ben 10: Omniverse, Shocksquatch was entirely re-designed, he appears slimmer than usual and he now has yellow and black fur, along with bigger fingers and toes; he also now has two plates on the side of his wrist instead of the back of his hands. He now has green eyes with black pupils, and has yellow horns; his symbol is on a green belt. He reappears in "The More Things Change" 2-parter to defeat Buglizard. He is another of Ben's Omniverse regular transformations.


Voiced by:

Electricyeti has yellow and blue fur, along with grey fingers and toes. He has two bolts on the side of his wrists instead of the back of his hands. He has blue eyes with black pupils and yellow horns. He also has a blue belt where the Omnitrix symbol is located. The Omnitrix symbol is blue with a gold outer casing.

Introduced in Omniverse[edit]

This list includes the aliens that were introduced to the franchise through the Omniverse installment.


Voiced by:

  • Yuri Lowenthal - Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

Feedback is a Conductoid (a play on conduct) from the planet Teslavorr (tesla- is from Nikola Tesla, a physicist who was renowned in his works in electric manipulation; and vorr is a play on vore, a Latin meaning for "to devour").

Feedback is a humanoid black-and-white alien that speaks with an electrical tone of voice. He has one green eye, plugs on his fingers, tail and two antennae. He can use these plugs to absorb and redirect most kinds of energy and use the electricity to grind on electric lines and fly by using it as propulsion. He can also shoot this electric stream from his fingertips thanks to this redirecting ability.

Feedback was Ben's favorite alien when he was 11 years old (possibly even more than Four Arms), using him even when he wasn't the right candidate for the situation and he became addicted to him. But due to Ben's overuse of the form, as revealed in the flashback events of "Showdown", Malware destroyed Feedback and removed him from the Omnitrix's Codon Stream. As a result of the event, the Omnitrix never accepts any new Conductoid DNA. However, in the final battle with Malware in the episode "Showdown: Part 2", Ben regained the ability to become Feedback. This version looks similar to the younger version, but has a black and green color scheme and is more muscular with golden bolts on his shoulders, arms, and hips. In the final episode of Ben 10: Omniverse, "A New Dawn", Feedback is the last alien to ever be used by Ben, whom he used to defeat Maltruant, a rogue Chronosapien, by sending him into an infinite loop of defeat. The only episode that shows Feedback without the bolts on his shoulders, arms and hips is "Weapon XI: Part 1".


Voiced by:

Bloxx (a play on "blocks") is a Segmentasapien (Portmanteau for "Segment" for part and "Sapien" for wise in Latin) from the planet Polyominus ("Poly" for many), whose body is totally composed by what looks to be Lego blocks as his name states.

His primary power is shape shifting. He can alter his body structure into any form needed; this includes some regenerative ability. He can also use his blocks to stretch and build himself. Due his shape-changing abilities based on blocks, his body is fragile and is easily broken when hit with enough force, but since he can regenerate it doesn't matter whether his body structure is broken or not. Ben first uses Bloxx in "The More Things Change Part 1", to save the alien grocery store of Bellwood and to help Rook disable the bomb.

Bloxx has four main shapes: His normal form, his ball form, his wall form, and his dome form.


Build-A-Guy is an alternate counterpart of Bloxx. Build-A-Guy's appearance looks similar to Bloxx's. His three main colors are; white, light blue, and gray, with black lines all over his body, unlike Bloxx whose main colors are; red, blue, and yellow.


Voiced by:

Gravattack is a Galilean (named after Galileo Galilei, an esteemed astronomer) from the planet Keplorr (From Johannes Kepler who discovered the laws of planetary motion). He is a living planetoid alien with a giant mouth and a molten (planetary) core at the center of his body and has the Omnitrix symbol on his forehead.

Gravattack has the power of manipulating the gravity of himself and others, changing their mass, making them heavier or lighter. Also with his gravity manipulation, he is able to make objects "orbit" around him like a planet and he can convert himself into a planet for better influence. He first appears in "A Jolt from the Past" to fight Fistrick in his Class 12 Armored Mecha Suit. An alternate version of Gravattack known as Orbit Man (used by Ben 23) is known to exist, although its appearance was never shown.

Ultimate Gravattack[edit]

Voiced by:

Ultimate Gravattack is more planet-like in appearance with three orbiting planetioid-like orbs surrounding him, larger spikes on his body, and his planetary core in his mouth. It is a form exclusive to Albedo that he first used in "For A Few Brains More".


Voiced by:

Crashhopper (a play on "grasshopper") has the primary power control being the muscles of his legs, allowing him to jump in a long distance on a high speed, causing a sonic boom. Due to his powers based on high jumps, he possesses a resistant skull, which is used to hit with great impact.

Ball Weevil[edit]

Voiced by:

Ball Weevil (a play on "boll weevil") is a small yellow beetle-like alien with the ability to spit sticky balls of plasma; this goo ball absorbs matter while it rolls, getting bigger and either explodes upon impact, expanding until detonating, or is remotely exploded by Ben, one of his powers as Ball Weevil; making the force of the explosion vary depending the size of the ball. He also has an enhanced agility, which allows him to move his goo to hit where he wants, and also seems that he can resist the explosive force of his own goo, even when he is stuck in it.


Voiced by:

Walkatrout (a play on walkabout and trout) is a blue spherical legged fish-like alien. Walkatrout is also a nickname for his species, though their true species name is Ickthyperamumbloids. It has a slippery body, enhanced agility, and is presumably able to breathe underwater.

He first appeared in "Outbreak" when Blukic and Driba were trying to fix the Omnitrix.

Pesky Dust[edit]

Voiced by:

Pesky Dust (a play on "pesky" and pixie dust) is a Nemuina, a pixie-like alien that can put people to sleep and manipulate their dreams for information. While Pesky Dust first appeared in "Outbreak" while Blukic and Driba were trying to fix the Omnitrix, Ben got to better utilize the form in "For A Few Brains More" to force Albedo's location out of a fearful Khyber, who possesses no defense against a Nemuina's powers.

Nighty Knight[edit]

Voiced by:

Nighty Knight is an alternate counterpart of Pesky Dust. He looks the same as Pesky Dust, but he has blue clothing instead of green and a lighter blue skin color. He also has blue eyes and gloves. His Omnitrix symbol is blue with a gold outer casing.


Voiced by:

Mole-Stache (a play on mole and moustache) is an orange mole-like alien with a British accent and a yellow moustache that can be used in a variety of ways that include serving as an extra set of hands or as a makeshift propeller. While Molestache first appeared in "Outbreak" while Blukic and Driba were trying to fix the Omnitrix, Ben got to better utilize the form in "Breakpoint" when he defeats Fistrick. In "Store 23," Ben showed them to Ben 23 to see what aliens his dimensional counterpart had unlocked. It's revealed in "Breakpoint" that Molestache speaks with a British accent.

The Worst[edit]

Voiced by:

The Worst is an Atrocian, a yellow pudgy alien that is practically indestructible yet can still feel pain and thus ineffective in combat. The Worst was what Ben called the form at the time, so it may not be his actual name. The Worst first appeared in "Outbreak" when Blukic and Driba were trying to fix the Omnitrix. He wears the Omnitrix on his "outy" belly button and wears green briefs.

Kickin Hawk[edit]

Voiced by:

  • Yuri Lowenthal - Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

Kickin Hawk (a pun on "kicking" and "chicken hawk") is a chicken/hawk-like combatant alien with a white mohawk-like comb. He has retracting talons and scythe-like blades. He can cut objects using his arm blades. He has enhanced strength and is very skilled at hand-to-hand combat. Ben accidentally downloaded Liam in "Outbreak" when fighting him and turned into Kickin Hawk.


Voiced by:

  • Eric Bauza - Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

Toepick is a yellow-skinned ogre-like alien who wears a metal cage as a helmet to conceal his horrific face which induces fear in any who see it, even himself as his own species cannot look at each other for that reason. The Omnitrix symbol is on the bottom of the collar his cage is on, which is connected by chains to a pair of black briefs.

Toepick was mentioned in the original series' non-canon episode "Ken 10", as one of the ten accessible aliens in Ken's Omnitrix, though Ken begged Ben to swap Toepick for Grey Matter, which he did. He makes his debut appearance in the episode "Special Delivery" to overwhelm Psyphon with his face. He later is used by Ben in "Something Zombozo this Way Comes" to scare Zombozo into submission.


Voiced by:

Astrodactyl (From Astro and Pterodactyl) is a pterosaur-like alien from the planet Terradino (Humungousaur's planet), that uses a propulsion jetpack to fly, because he can't fly on his own. Astrodactyl also uses an internalized star power from sonic booms to energy whips. He wears the Omnitrix symbol on his shoulder. A downside is that Astrodactyl has low endurance and vulnerable to electricity. Astrodatcyl makes his debut appearance in the episode "While You Were Away" to fight Dr. Pyschobos. The name is a play on astronaut and pterodactyl, but literally translates from Greek as "starfinger."


Voiced by:

  • John DiMaggio - Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

Bullfrag (From "Bullfrog", and the suffix -frag, which means annihilate) ("frag" could also be a reference to the Incurseans' Boston-like accent, as they would pronounce words differently, making "frog" sound like "frag") is an Incursean (a play on Incursion). The Incurseans are a race of violent toad-like aliens with Boston accents, forced to become spacefarers after the eon-long civil war on their homeworld ended a millennia ago as the result of their planet being inadvertently destroyed by Ascalon's power. Besides their extendable tongues, Incurseans make use of their agility and leg strength in a fight. Ben gained Bullfrag during the episode "The Frogs of War" by Azmuth to infiltrate the Incurseans' ranks with the Omnitrix in "Life Form Lock" mode to remain in the form until the second order. This also enabled Ben to distract Princess Attea, though found it a bit disturbing that his mindset as Bullfrag has him having a mutual attraction to Attea. Bullfrag can also jump and is very agile with quick reflexes.


Voiced by:

  • John DiMaggio - Ben 10: Omniverse, Ben 10: Omniverse: Galactic Monsters

Atomix (From "Atomic") is a robotic-humanoid like alien who uses radiation and atom-based attacks, and is said to be Ben's second most powerful transformation, next to Alien X. He can create an atomic blast at a particular area and orbs of atomic energy, he has incredible superhuman strength and superhuman durability. He speaks in a highly respectful way, addressing Grandpa Max and Gwen as "grandfather" and "cousin" instead of their names.

Atomix was first mentioned in "Ken 10." He was first seen in "For a Few Brains More" to take down Albedo as Ultimate Humungousaur and Ultimate Spidermonkey. The form was named by Azmuth while his primary brain was removed from his body. Atomix reappears in "The Vampire Strikes Back" to create an orb to destroy Zs'Skayr and hurt Lord Transyl, in which it is revealed that his orb can stay there even when the Omnitrix times out.


Voiced by:

  • Rob Paulsen - Ben 10: Omniverse: Galactic Monsters, Ben 10: Omniverse

Gutrot is a purple-skinned alien in a green suit with a clear view of his stomach, which mixes a variety of gases and chemicals that fires from nozzles on parts of his body, the chemicals could kill a human easily. While in this form, Ben has a vast knowledge of complex gases. Gutrot first debuts in "Animo Crackers", learning the range of his abilities from future Animo. During the Galactic Monsters season, he replaces Four Arms in the opening.


Voiced by:

  • John DiMaggio - Ben 10: Omniverse: Galactic Monsters, Ben 10: Omniverse

Whampire is a Vladat (a pun on "Vlad the Impaler"), a vampire-like alien, from Anur Vladias, an uninhabitable planet in the Anur System. Doing his best thinking while upside-down, Whampire is able to drain the life force of others and use hypnosis and bat-like parasites called Corrupturas (a portmanteau of corrupt and "chiroptera," the order of bats) to control his opponents mentally and physically. He can also fly. One major flaw to the Vladats is that they can be weakened by sunlight. Vladats were originally the ruling race in the Anur system, their leader being the name sake of the system's main planet Anur Transyl, before they became extinct while being remembered as a tyrannical race. During the events of "The Vampire Strikes Back", Ben scanned the Vladat DNA from the resurrected Lord Transyl and used the parasites to get the info on the whereabouts of Zs'Skayr's castle from Viktor, Crujo, and Kuphulu.

Introduced in the reboot[edit]

This list includes the aliens that were introduced to the franchise through the 2016 Ben 10 series, which serves as a reboot in the franchise.


Voiced by:

Overflow is a Cascan from the planet Cascareau in the Andromeda Galaxy, a species similar to the Orishans in both appearance and ability to manipulate water in various ways through the tubes lining their armor. Ben first assumed the form in "Waterfilter".

Following the events of "Omni-Tricked", Overflow gained the ability to become Omni-Enhanced Overflow, with Shock Rock's armor covering his head, torso, and legs. He has two water cannons that come out of his back and first appeared in "Animorphosis".


Voiced by:

Gax is a Chimera Sui Generis from the planet Vilgaxia, a race of cephalopodic humanoids who are able to turn into giant squid-like creatures when exposed to water. Gax is essentially a clone of his DNA's donor Vilgax, but in black armor that has a white stripe on the chest. He has spikes on his knees and shoulder pads and has six tentacles dangling in the front of his face. His tentacles fades into orange and wears black wristbands. The Omnitrix symbol is on his chest. Not only is Gax incredibly strong and durable, he also has the ability to fire lasers from his eyes and turn his arms into a quintet of tentacles. Gax first appeared in the "Omni-Tricked" four-parter, though Ben lost use of the form after an aged Vilgax retrieved his DNA sample to restore himself to his prime.

Shock Rock[edit]

Voiced by:

Shock Rock is a Fulmini from the planet Fulmas, a race of stone-armored energy beings that manipulate electrical energy in various ways that include energy absorbing to power up attacks and creating electrical constructs like boomerangs, shields, and hammers. Shock Rock initially appeared as a silhouette in "Omni-Tricked" and through Ben's Omni-Enhanced forms before being formally introduced in "The 11th Alien", Vilgax worked with the Weather Heads to make it appear that Shock Rock was a threat to Ben and Earth itself as part of a scheme to steal the Omnitrix. However, in "Innervasion", it is revealed that Shock Rock was dangerous in a different way: the Fulmini are intergalactic conquerors that pillage planets for their energy to keep Fulmas from falling apart. Every time Ben used Shock Rock, it sent out a beacon which allowed the race to pinpoint Earth's location, and they eventually use the Omnitrix as a wormhole.


Confirmed to exist and/or non-canon[edit]

This list includes the aliens that Ben has access to, but have never been seen onscreen.

  • Snakepit, Sandbox, and Shellhead are unseen aliens, mentioned in "Ken 10," much to Ken's dismay. Shellhead is described as a turtle alien, whose only power is hiding in his shell.
  • Rocks is a Basalt from the planet Andesite. He appears to be a yellow, crystalline rock monster. He wears the Omnitrix on his chest. Rocks was first seen in the play "Power of the Omnitrix". He was among the aliens Ben unlocked offscreen in the Omniverse episode "Let's do the Time War Again".
  • Squidstrictor is a Cephalod-ae from the planet Molluskus. is an orange animalistic alien with a jellyfish looking head, green eyes, and a body with multiple tentacles like a squid. The Omnitrix is located on the chest of the torso that connects the tentacles. Squidstrictor was first seen in the play "Power of the Omnitrix". He was among the aliens Ben unlocked in the Omniverse episode "Let's do the Time War Again".
  • Thriller Whale is an alien. According to Matt Youngberg, "his power was gonna have to do with dancing and music."
  • Somnambulizard, Skidmarx, and Bungee Sponge are powerless or underpowered aliens that were unlocked when Ben was 11-years-old, according to Matt Wayne.
  • Portaler resembles a cross between a turtle and a beetle. He has segmented yellow arms and legs that end in stumps, with blue sleeve-like plating on his shoulders. He has a turtle-like face with sunken green eyes and visible nostrils, and has two beetle-like antennae ending in yellow bulbs. His skin is green, and has a blue, yellow and red circular pattern on his stomach. On his back is a blue, turtle-like shell with a red rim and red rock-like spikes on it. Portaler wears the Omnitrix on the red armor plate on top of his head. This alien was created in a contest, and used in the game, Portal Run, but has never been used in canon, on or off-screen.
  • Ventrilosquid is an alien described by Derrick J Wyatt as "sort of a telepath". Ventrilosquid's name is a portmanteau of "ventriloquist" and "squid". Matt Wayne stated that "he doesn't exist in this...", then cut off, stating he said too much. He was among the aliens Ben unlocked offscreen in the Omniverse episode "Let's do the Time War Again."
  • Bob the Blob, Plantapocalypse, and Antigravitesla are aliens featured in the Ben 10 Total Access marathon bumpers native to Latin America. The first is a grey two-headed blob-like alien, the second is a gigantic potted plant-like alien, and the latter is a mint green humanoid that can control gravity.
  • Decagon Vreedle is Ben's variation of a Vreedle, and according to Derrick J Wyatt, Ben would be horrified to know he exists.
  • Slampeed is a Pulsoar from Luas Tapa.
  • Charcoal Man is the Dimension 23 incarnation of Heatblast.
  • Dog-Nabbit is the Dimension 23 incarnation of Wildmutt.
  • Splitter Critter is the Dimension 23 incarnation of Ditto.
  • Giant Manster is the Dimension 23 incarnation of Way Big.
  • Mr. Mucky is the Dimension 23 counterpart of Swampfire. His appearance is similar to the original version of Ben Prime's Swampfire but with Ben 23's colors.
  • Copy Copy is the Dimension 23 incarnation of Echo Echo.
  • Muck Amuck is the Dimension 23 incarnation of Goop.
  • Cyber Crab is the Dimension 23 incarnation of Brainstorm.
  • Rath of Dimension 23 is the Dimension 23 incarnation of Rath.
  • Teeny Weeny is the Dimension 23 incarnation of Nanomech.
  • Fastcat is the Dimension 23 incarnation of Fasttrack.
  • Windy-Hindy is the Dimension 23 incarnation of Clockwork. His appearance is similar to Young Ben's Clockwork.
  • Fix-It Gremlin is the Dimension 23 incarnation of Jury Rigg.
  • Feedback (formerly known as Plug Man) is the Dimension 23 incarnation of Feedback. His appearance is similar to Young Ben's Feedback.
  • Orbit Man is the Dimension 23 incarnation of Gravattack.

See also[edit]


  1. ^ Dwayne McDuffie revealed that Big Chill cannot turn invisible, and when he did, it was an error.
  2. ^ Sugilite, Chromastone's genetic donor, is the guardian of Petropia, Diamondhead's home planet.


External links[edit]