Unicron as depicted in IDW Publishing.
|Function||Bringer of Chaos (Fun Publications)|
|Partner||Cyclonous, Dead End, The Fallen, Galvatron, The Liege Maximo, Lockdown, Nemesis Prime, Nightstick, Scourge, Sideways, Starscream, The Sweeps, and Thunderwing.|
|Motto||"That which does not become a part of the one, shall become one with the void."
"Even in outer space, the darkness becomes a part of you." (Superlink)
"Until all is undone." I am Unicron.(Fun Publications)
|Alternate modes||Planet, Tank|
|English voice actor||Orson Welles (1986 film)
Roger C. Carmel (animated series)
Blu Mankuma (Beast Wars)
Mark Acheson (Armada & Energon)
Matt King Transformers (video game)
John Noble (Prime)
|Japanese voice actor||Mizuho Suzuki (Movie Jpn dub)
Tetsuo Komura (Beast Wars Neo)
Katsumi Chō (Micron Legend)
Nobutoshi Canna (Super Link)
Unicron is a fictional character from the Transformers universe and toyline. Created by Floro Dery, he was introduced in the 1986 animated film The Transformers: The Movie and has since reappeared in Transformers: Armada, Transformers: Energon, Transformers: Cybertron, Transformers: Prime, and Atari's 2004 Transformers video game. Unicron is a prodigiously large robot whose scale reaches planetary proportions, and he is also able to transform into a mechanical planet. Unicron's origin has expanded over the years from simply being a large robot to being a god of chaos who devours realities. He often employs the help of Decepticons in his work, and in some stories is considered part of the origin of the Decepticon forces.
- 1 Fictional character biography
- 2 Physical Dimensions
- 3 Animated series
- 4 Publication history
- 5 Video games
- 6 Books
- 7 Toys
- 8 References
- 9 External links
Fictional character biography
|This section does not cite any sources. (August 2015)|
According to the Transformers lore, before the dawn of time, Order and Chaos existed within an extra-dimensional entity known as The One. To explore the fledgling universe, he created the astral being known as Unicron, and then subdivided him, creating his twin, Primus. Both brothers were multiversal singularities, unique in all realities, but whereas Unicron could only exist in one universe at a time, moving freely between them at will, Primus existed simultaneously in all realities at once. It is suggested[by whom?], in fact, that the two brothers embodied the basic concepts of reality—good and evil, order and chaos—and that their continued existence is necessary for the stability of the storyline multiverse itself.
Continuing the fictional origins, per the lore, as Unicron and Primus ventured through the cosmos, it became apparent to Primus that Unicron was nothing but a purely corrupt being, and so he confronted the threat his sibling posed. In combat, Primus was no match for Unicron; in cunning, however, he proved himself to be his brother's superior when he shifted their battle to the astral plane, and then back to the physical world once more, sacrificing most of his strength to manifest their essences within metallic planetoids, leaving them both trapped in the planet prison. It was with this act of sacrifice that Primus hoped to contain the evil force forever. Unfortunately, over time, Unicron learned to physically shape his prison into a giant metallic planet, and Primus followed his brother, where Primus planet would become the mechanical world of Cybertron. When Unicron then learned to transform his planetary form even further, into a gigantic robot form, Primus could also, but adapted the idea, and created The Thirteen, a group of robotic beings that possessed the ability to change shape, like Unicron.
The war between Unicron and Primus came to its seeming end during a climactic battle in which one of the Thirteen, Megatronus Prime, who would forever afterwards be known as The Fallen, betrayed Primus and became an acolyte of Unicron. The battle ended when the Fallen and Unicron were sucked into a black hole and disappeared from reality itself. With Unicron gone for now, Primus entered an eons-long slumber, preventing Unicron from detecting him through the mental link the brothers shared.
The Primus/Unicron backstory has evolved and been rewritten a number of times since it originated in the Marvel Comics series. The version recounted above is the current iteration, which has slowly solidified across a wide swath of media (beginning around the time of Transformers: Armada). Before the Primus/Unicron mythos reached its present form, it went through several distinct versions in the Marvel Generation 1 comics and elsewhere.
The first time the Primus/Unicron backstory appeared was in the UK comic continuity, from Unicron himself, in the story "The Legacy of Unicron!", when he recounted it to Death's Head. Per Unicron's telling of events, he was a primal force of evil at the dawn of the universe, who led a legion of Dark Gods against his mortal foe, Primus, Lord of the Light Gods. Events proceeded to play out basically as described above, though the role of the Light and Dark Gods would diminish with each subsequent retelling of the story, until the current version, in which Primus and Unicron are alone, and have a unique origin.
The second time the story was told was in the United States book by the Keeper, an ancient mechanoid who guarded Primus's head at the center of Cybertron. This telling is effectively the same as the previous UK story, but mentions that their battle was towards the end of the era of gods, that Primus and Unicron were the last of their respective pantheons, and Primus had to defeat Unicron before he could take his place with the other gods in the "Omniversal Matrix".
The third time the story was told was also in the United States Marvel series, this time by Primus, when he gathered all his children together to prepare for Unicron's coming. It was with this telling that we learned that Unicron predated the current universe, and had destroyed the previous universe which existed before the current one. He had slept peacefully, alone in the void of un-creation that remained, until fragments of the old universe that he had overlooked reacted, causing the Big Bang and birthing the current universe. The "sentient core" of this new universe recognized the threat that Unicron posed, and so created Primus to counter his evil and be guardian of the new creation.
The first modern retelling of the origins of Primus and Unicron did not come from Generation 1-oriented media, but from a set of Transformers: Armada trading cards released by Fleer. It was the backstory printed on Unicron's card which introduced the concept of the two being brothers created to explore the new universe by an extra-dimensional entity, here named the "Allspark".
This was subsequently expanded on and combined with aspects of the various Marvel Comics stories in Transformers: The Ultimate Guide, published by Dorling Kindersley and written by Simon Furman, who had written all three prior tellings in the first place. Here, the entity Fleer had called the "Allspark" was redubbed "The One", and the modern iteration of the myth detailed above was firmly established, and went on to form the backbone of subsequent fiction such as Transformers: Universe and Fun Publications' Transformers: Cybertron comics.
Across the Multiverse
Although many of the official television and comics appearance of Unicron appear to present separate and distinct incarnations of the character, some writers have presented an interpretation of the sources that ties all the versions of Unicron together into a single continuity. Likewise, Primus is also a "multiversal singularity", but while Unicron is limited in this ability, and can only exist in one reality at a time, travelling between them, Primus co-exists in all realities simultaneously.
This concept began with the release of a series of Transformers: Armada trading cards by Fleer. The biography printed on Unicron's card presented him to be one of two heralds created by the Allspark to explore the newly birthed universe. Inspired by his Marvel Comics origin, the other herald was Primus, and the brothers set about this task, until they came upon a region of space teeming with pure Energon. Unicron wanted this power for himself, and cut Primus down before he could report it to the Allspark, casting his brother's body into the orbit of a nearby star. And so Unicron went on to become the engine of destruction that menaced the universe in recent years.
Not long after this, the publication of Transformers: The Ultimate Guide by Dorling Kindersley cemented this notion. Writer Simon Furman incorporated the various aspects of the Dreamwave comics story, some elements of the Fleer storyline and his original Marvel Comics origin to create what is now essentially the "definitive" origin for Unicron. In this version of events, Unicron and Primus were again twin heralds, giant metal planetoids created by the "One", who were sent to explore the universe. But Unicron was an imperfect being and turned to evil, adapting his form to transform into a giant robot. To battle him, The One gave Primus this power also, but Primus opted to remain in planet mode, and passed the transforming abilities on to thirteen robots that he created from himself; the first Transformers. One of the thirteen turned on Primus and sided with Unicron, however, and the war culminated in a battle that saw Unicron and this traitor, the "Fallen", sucked through a black hole into another universe.
This new origin is part of the G1 timeline laid down by the Ultimate Guide, which is apparently being taken as the "official" G1 timeline for future projects that require it. This means that there is only one Unicron who has travelled from universe to universe across all the assorted Transformers continuities. This interpretation of the character is evidenced by the parallel universe spanning Transformers: Universe toyline and convention-exclusive comic books — in which the singular Unicron captured Transformers from various alternate realities and pitted them against each other, feeding off the energies released — and the Transformers: Cybertron comic strip in the Transformers Collectors' Club fan magazine, which depicts Unicron's actions in the various realities in a chronological order and claims that Cybertron is the stable heart of the Multiverse.
Unicron's size has never been specified in any canon materials, aside from the vague term "planet size". In The Transformers: The Movie, Unicron's height appears to be anywhere from several kilometers (as when handling Galvatron) to several hundred kilometers (as when attacking and destroying Lithone and Cybertron's moons, and attacking Cybertron). A planet-mode diameter of 1,000 km (620 mi) has been suggested and robot-mode dimensions would follow from that estimate, provided that there is no change in size (compression or expansion) common among so many Transformers. In fact, one scene in the movie shows Jazz driving out of one of Unicron's eyes, just small enough to fit through them, though in another scene the Quintesson ship Hot Rod arrived is tiny compared with the eye. Unicron is also small enough to stand on Cybertron's surface. In season 3, it is shown that the eyes from Metroplex and Trypticon (both city-sized Transformers) are the perfect size to use as replacement parts when Unicron orders the ghost of Starscream to steal them. However, later in the episode when Trypticon moves Unicron's head, the head is larger than Trypticon's entire body. (Note: However, the eyes could be only small components for his Optic Sensors to be reformed and/ or completed.) In the storyline "The Ultimate Doom", Cybertron appeared to be smaller than Earth's own moon (and by extension, this would indicate Lithone would be too small to be a planet), making Unicron's dimensions in the cartoon harder to define.
The comic version of Unicron may be far larger. In the first issue of Marvel Comics Generation One Transformers comic, Cybertron is said to be around the size of Saturn (which has a diameter of roughly 120,000 km (75,000 mi) at the equator). As Unicron's planet mode is seen to be about a quarter the size of Cybertron in the comics, this would suggest a diameter of 30,000+ km. The Dreamwave equivalent of Unicron may be the same size, as the Cybertron of the Dreamwave universe was also said to be the size of Saturn.
The Transformers Prime iteration of Unicron depicts his physical manifestation as the Earth itself, with his consciousness held within the core, making him a planet with sustainable life, though it has not been seen if Unicron wishes to consume other planets like his other incarnations.
|This section does not cite any sources. (May 2011)|
The character Unicron first appeared in the opening scene of 1986's The Transformers: The Movie, immediately making clear his driving goal by consuming the small world of Lithone in the year 2005. Subsequently, when the battered bodies of Decepticon leader Megatron and several of his troops were set adrift in space by Starscream following a furious battle with the Autobots, Unicron appeared before them and offered Megatron a deal: in exchange for a new body, and new troops, Megatron would destroy the Autobot Matrix of Leadership, the only thing that could stand in Unicron's way. Thus, Megatron became Galvatron, and began to carry out his assigned task, although he was loath to do so. When Galvatron showed any signs of opposition to Unicron's will, Unicron inflicted agonizing torture on his servant, even from a great distance, to coerce him into obedience.
Following Unicron's consumption of Cybertron's two moons, Galvatron successfully obtained the Matrix from Ultra Magnus, believing he could use it to bring Unicron under his control. Attempting to open the Matrix to intimidate Unicron, Galvatron only prompted his transformation into robot mode, and was swallowed by the planet-eater. Unicron proceeded to lay waste to Cybertron, halted briefly when the young Autobot, Hot Rod, crashed a Quintesson spacecraft through his eye. Finding Hot Rod inside Unicron's body, Galvatron suggested an alliance against their common enemy. However, Unicron inflicted his mental torture upon Galvatron, forcing him to fight Hot Rod. Hot Rod took the Matrix from Galvatron during the battle, and became Rodimus Prime. Rodimus threw Galvatron into space, freeing the Decepticon from Unicron's mind-control, and opened the Matrix within Unicron, destroying his body, leaving only his head, which became a moon of Cybertron.
In The Transformers: The Movie, Unicron was voiced by Orson Welles. Unicron proved to be Welles's final role, as he died a few days after completing work on the project; rumors persist that Welles did not complete recording of all his lines, and that Leonard Nimoy filled in for him, but the film's voice director Wally Burr and actress Susan Blu refute the claim. There were two early attempts to produce Unicron toys for the Transformers toyline, featuring voice clips from Welles himself, but the results never made it to production. It was not until 2003 that a production Unicron toy was made. For the 20th anniversary of the original movie, Diamond Select released an eight and a half inch tall statue of Unicron and Rodimus Prime.
The third season of The Transformers animated series continued Unicron's story from where the movie left off, as the planet-eater's deactivated head settled into orbit around Cybertron, a grisly monument to the moons he had destroyed. His head was soon visited by Cyclonus, who accessed the memory bank to discern the fate of Galvatron, who had been hurled from Unicron through space by Rodimus Prime. Some time later (Episode 81: "Ghost in the Machine"), the spark of deceased Decepticon Starscream reactivated Unicron's head and entered into a bargain with him, performing three labors in exchange for the restoration of his body. Starscream (inhabiting and controlling Scourge's body) gathered for Unicron Metroplex's eyes (breaking one and replacing it with one from Trypticon) and Trypticon's transformation cog, and then began connecting his head to Cybertron, which would become Unicron's new body. Starscream demanded that Unicron restore his own body so that he could complete the required connections; but once Unicron had done so, Starscream, somewhat predictably, double-crossed him and refused to finish the job. Unicron's head was subsequently blown off into space by an explosion instigated by the Autobots.
Later, when searching for a new supply of positrons (anti-electrons), the Decepticons ventured to Unicron's head, where Cyclonus and Scourge accidentally awoke the slumbering demi-god. At the same time, Grimlock - who had gained super-intelligence through an infusion of anti-electrons - had constructed from pieces of Unicron's head the Technobots, and one of their number, Strafe, severed enough of Unicron's neural connections to shut him back down.
Although Unicron himself did not appear again, his origin in the animated series was later revealed. Unicron was created near the beginning of the universe by the diminutive genius known as Primacron, who intended for him to devour all life in the universe, leaving a blank slate that Primacron could use as he saw fit. However, Unicron turned upon Primacron, deciding that he would rule the universe and subsequently setting out to achieve that goal.
Unicron's head was seen one last time as Primacron's new creation had crippled Cybertron. This time the head looked very old and almost stone-like, underlining that Unicron was finally dead.
When the Generation 2 animated series was aired, animated bits of the film with Unicron in it were edited into the episode "More Than Meets The Eye Part 1".
Although the real Unicron did not make any appearances in 1996's CGI animated series, Beast Wars, his legend held strong. Starscream's ghost spun a lie that claimed Unicron had destroyed him (Unicron's planet mode was seen in Starscream's fabricated flashback), and when the mysterious alien race known as the Vok directly communicated with Maximal leader Optimus Primal, they searched his mind for an image that he would fear and respect, found Unicron and took the form of his head. Later, in Season 3 of Beast Wars, it was revealed that Tarantulas had attempted to destroy both Autobots and Decepticons in the Ark, as he and the Tripredacus Council were descended from a different lineage than Autobot or Decepticon, and would hence inherit Cybertron all to themselves. Although never directly stated, it is implied that the ancestor of Tarantulas and the Council is in fact Unicron; Megatron refers to Tarantulas as "Unicron's spawn" in the Beast Wars episode "Nemesis Part 1".
In Episode 16 of Beast Machines, Rattrap called Megatron's floating head a tribute to Unicron.
Conversely, Unicron played a large role in the two Japanese-exclusive animated Beast Wars series, Beast Wars II and Beast Wars Neo. Following the events of The Transformers: The Movie and Unicron's demise, the Angolmois energy that gave Unicron life was left sealed within planet Gaia (a future version of Earth). When the war on this planet between the forces of Maximal leader Lio Convoy and Predacon leader Galvatron (a different individual bearing the same name as Unicron's original creation) culminated in the explosion of Galvatron's Nemesis battle fortress, the resultant energy surge revived Unicron's consciousness. Seeking to complete his resurrection, he created the Blendtrons to gather the Angolmois Capsules his life-energy was now sealed in, and then proceeded to possess the lifeless body of Galvatron as a temporary host. After gathering the capsules, Unicron attempted to make Cybertron his new body, but was finally defeated by Maximal commander Big Convoy and his Matrix Cannon.
As with his original incarnation, there was a failed attempt to make Unicron into a toy for the Beast Wars Neo line, and although regarded as quite impressive, the prototype - which, notably, does not resemble Unicron from the Beast Wars Neo series at all - did not make it into the production.
Although Unicron had played a major role in the above-mentioned Japanese series, he had not been featured as a major player in American fiction for over a decade. That all changed with the advent of the three co-produced series Transformers: Armada, Transformers: Energon and Transformers: Cybertron, which reintroduced Unicron to American audiences and finally rendered him in toy form, with the Mini-Con partner Dead End. In reference to Unicron's key role in these three series, Hasbro's head of Transformers, Aaron Archer, has collectively dubbed them "The Unicron Trilogy".
This incarnation of Unicron was never shown to physically consume planets in the same manner as his G1 predecessor, only to blast and absorb the remains. However, during his battle with Optimus Supreme, who had grown to Unicron's size, Unicron demonstrates that he had enough power to simply destroy a planet completely without consuming it. However, several references were made to consumption, so he may indeed perform the action. For example, in one of the mini-comic books packed in with the later Armada toys, Unicron is indeed illustrated literally eating an asteroid or moon whole. This Unicron was voiced by Mark Acheson in the U.S., and by Katsumi Chō in Japan.
A primal force of evil from the beginning of time, his origins lost to the mists of history, the Armada universe's incarnation of Unicron was the embodiment of the darkness and hate that lurks in the hearts of all beings. Having been defeated by the Autobot warrior Omega Supreme at some time in the ancient past of Cybertron, Unicron hid himself in plain sight of the Transformers, disguised as the planet's moon. In order to re-energise himself, Unicron implanted some of his own cells within Cybertron, where they grew and "hatched", giving birth to the diminutive race of robots called the Mini-Cons. It was Unicron's intent that these small robots would increase the ferocity of the Autobot/Decepticon war, allowing Unicron to feed off the hatred that the war fermented - but as a result of interference by human children, displaced in time from the 21st century, the Mini-Cons developed sentience, and fled Cybertron, crashing on Earth, where they lay dormant for a million years.
The subsequent awakening of the Mini-Cons once again increased the pace of the war, and to hasten the proceeding, Unicron created another being from his own body, Sideways, to serve as his agent for the purpose of constantly manipulating the events on Earth to keep the balance of power forever shifting, the ferocity of both sides constantly increasing. At the culmination of his plan, the Decepticons came into possession of all three Mini-Con weapons - the Star Saber, the Skyboom Shield and the Requiem Blaster - which Sideways and Thrust then stole and used to reactivate Unicron.
Shedding his lunar skin, Unicron transformed to robot mode and turned on Cybertron as the combined Autobot/Decepticon armada attempted in vain to stop him. Optimus Prime and Megatron (now Galvatron) entered his body with the human children, and Unicron addressed them through Sideways's form, absorbing all but Optimus into his collective consciousness and bringing the Mini-Cons back under his control. However, from within Unicron's mind, Rad was able to use his connection to High Wire to restore the Mini-Cons' individual minds, freeing the weapons and deactivating Unicron. With the danger apparently over, Galvatron challenged Prime to a final battle, but the hatred between the foes stirred Unicron to life again, and upon realizing this, Galvatron decides to sacrifice himself to make sure there will be no more hatred. Plunging himself into Unicron's maw and allowing Optimus to escape alive, Galvatron ended the hatred, and in a mighty flash, Unicron vanished without a trace although at the end of the series he was shown orbiting an unknown planet.
However, Unicron's body was inactive, badly damaged from his previous battle, and ten years after Galvatron's sacrifice a former victim of Unicron chose to strike. Within Unicron's shell, the Spark of Alpha Q, ruler of Planet Q, which Unicron had consumed in the past, still existed, and from Unicron's body he created the Terrorcons to gather Energon, which he would use to regenerate all the worlds Unicron had devoured. However, Megatron's corpse and Spark remained within Unicron, and slowly siphoned off some of the gathered Energon, allowing him to be reborn in a new body through the unintentional actions of Scorponok. Hunted by Megatron, Alpha-Q then jettisoned Unicron's head and escaped in it, while Megatron took over Unicron's body and continued to gather Energon in order to rebuild Unicron to use as his ultimate weapon. As the climax of this plan neared, a joint attack by Alpha-Q, the Autobots and their human allies saw all of Earth's Energon channeled into Unicron's head, which Alpha-Q then rammed into Unicron's body. The positively charged Energon of Earth reacted with the negatively charged Energon running through Unicron, tearing open a fissure in reality leading to a new area of space where planets Unicron consumed were recreated and sustained through the Energon radiated from Unicron's head, which had now become a glowing red sun.
Unicron's body, damaged once more, lay in the dark reaches near the fissure, and the Decepticons began to raid Alpha-Q's new planets for the Energon necessary to revive Unicron again. This time, they succeeded, and Megatron directed Unicron's body to retrieve his head, extinguishing the Energon Sun and killing Alpha-Q in the process. But the power of Unicron proved too much for Megatron to control, as Unicron began to take over Megatron's body. In the ensuing battle Unicron's body was successfully destroyed by super-powered Optimus Supreme with help of some of the other powered Autobots. Unicron's body was destroyed - but unbeknownst to anyone, he lived on in two forms: his minuscule Spark, and his consciousness, which lay buried in Megatron's mind. With quiet, subconscious nudgings, Unicron led Megatron to a massive reservoir of "Super Energon" beneath Cybertron's surface, which transformed him into Galvatron upon his first exposure. After a series of failed battles, Galvatron proceeded to expose himself to the Super Energon once again, and this time grew to a gigantic height. Unicron seized control of his body again for a new vessel and set out to rejoin with his Spark, but a Primus-empowered Optimus Supreme engaged him in battle once more, and drew all of Unicron's consciousness out of Galvatron and sealed it within his own Spark. Enraged, Galvatron prepared to destroy Unicron's Spark, but it merged with him, enlarging him again, leading to another battle with Optimus Supreme, this time bolstered by the combined energy of all his troops' Sparks. Meanwhile, Primus merged with the Super Energon, creating a foundling sun which arrived at the site of the battle. Taking control of his body for a brief moment, Galvatron once again sacrificed himself in order to stop Unicron, plunging himself into the infant sun, which ignited and gave new life to Alpha-Q's worlds.
With Unicron's destruction in Energon, the collapse of his body resulted in the creation of an enormous black hole which, if left unchecked, would consume and destroy everything. This necessitated that the Autobots find the Omega Lock and the four Cyber Planet Keys to save Cybertron and the universe. Later, the Cybertron Transformers learned from Primus himself that destroying Unicron resulted in an imbalance between good (Primus, who still existed) and evil (Unicron, who was gone); this imbalance factored into the creation of the black hole, known as the Unicron Singularity in American fiction or the Grand Black Hole in Japan. His scattered pieces was absorbed by Megatron giving Megatron dark powers and causing him to look like Unicron.
However, the Japanese equivalent, Galaxy Force, made several scattered references to Unicron, as the Japanese producers for the series decided not to have Galaxy Force follow on from the events of Micron Legend (the Japanese equivalent of Armada) and Super Link (the Japanese equivalent of Energon).
The toy of Unicron in the Cybertron series is the size of a deluxe class Transformer toy and transforms into a Cybertronian tank instead of a planet. This portrayal of Unicron is consistent with his appearance in the Cybertron strip in the Hasbro Club Collector's comic where he is portrayed at around the same size as his foes Sentinel Maximus and Omega Prime.
In 2010 series Transformers: Prime storyline, Unicron (voiced by John Noble) is the source of Dark Energon, a form of Energon with the ability to revive the dead - albeit in a mindless, zombie-like "Terrorcon" state - also known by the name "the blood of Unicron". Unicron is also believed to represent the Anti-Spark (most likely a counterpart of the Allspark). As Optimus Prime relates, Primus and the original Thirteen Primes defeated Unicron and sent his in-stasis body beyond Cybertron's orbit. But as the Chaos Bringer drifted through space, he eventually attracted space debris around himself that formed into planet Earth, rich with Dark Energon. As the four-part season one finale begins, an prophesied astrological alignment awakens Unicron from his slumber as Earth's weather patterns go out of control. Having transcended physical form, Unicron begins to awaken as he berates Megatron for thinking of being his servant.
Sensing Optimus Prime and the Matrix of Leadership, Unicron resolves to finish the Autobot leader himself using the rocks that hold trace metals comprising his body to create golem incarnations of himself to personally kill the Autobot. Though Optimus Prime attempted to plea for the humans who evolved on Earth, Unicron dismisses them as parasites with the intent to slaughter them once finished with Optimus Prime. Though the Autobots come to Optimus Prime's aid, Megatron doesn't want anyone else to kill Optimus Prime and sides with them as he guides them to the Earth's core to stop Unicron before he completely awakens and destroys Earth. Despite using his anti-bodies and possessing Megatron's body to hinder him and the other Autobots, Optimus Prime uses the Matrix of Leadership to deactivate Unicron without destroying the Earth, though he loses his memory of being a Prime until the Autobots restore it.
The awakening of Unicron from within the Earth sent ripples that echoed into the multiverse, drawing the attention of Lio Convoy in another dimension. Travelling across realities, he arrived to find that the Autobots and Decepticons had already defeated Unicron, but elected to remain in this world for a time to safeguard against his potential return. Using his ancient sword and the power of his Energon Matrix, Lio Convoy carved up the remains of one of Unicron's rock-and-stone avatars to create the powerful Gaia Armor, severing its link to Unicron himself but allowing it to retain the power of Dark Energon.
Unicron returns in the series finale movie Transformers Prime Beast Hunters: Predacons Rising. When Optimus Prime restores the spirit of Primus, Unicron senses it and awakens once more, this time in energy form. He confronts Megatron, saying that because of the Dark Energon within him, Megatron cannot become one with the Allspark. Therefore, he will become Unicron's vessel, and serve him in order to destroy Cybertron. Unicron then brings Megatron back to life and upgrades his form, using it to hurtle through hyperspace toward Cybertron. Upon arriving, he confronts Bumblebee, Arcee, Bulkhead, and Smokescreen, very nearly killing them all using his Dark Energon weapons. At that time, Megatron starts to question Unicron's motives of destroying Cybertron, but he only ends up being psychically tortured by Unicron to be kept at bay. After their escape, Unicron comes across Predaking, who upon recognizing Megatron's body, viciously attacks Unicron in beast mode. After a short and fierce battle, Unicron proves to be stronger than Predaking and knocks him unconscious, then proceeds to read his mind, finding that Predacon remains will make a perfect legion for his destruction of Cybertron and Primus.
Unicron then proceeds to a Predacon boneyard, defeating Predacons Skylynx and Darksteel in battle and bringing hundreds of deceased Predacons back to life as Terrorcons. He leads his new undead army to Cybertron's Well of All Sparks, and engages the Autobots, Decepticons, and Predacons in battle. He then confronts Optimus Prime when he senses the Allspark itself, and fights him on even terms until he strikes Optimus down when Optimus makes a grab for the Allspark's container as Bumblebee holds Unicron down. Eventually escaping Bumblebee, Unicron flies after Optimus and Unicron then opens the container, but upon finding it empty, he realizes too late that it is a trick, and his energy form is sucked into the container, freeing Megatron from his control and defeating Unicron once and for all, also destroying his legions of undead Predacons. It turns out that Optimus had stored the Allspark in the Matrix of Leadership and would soon take the Matrix into the Well, sacrificing himself to ensure the return of Cybertronian life. Also, ironically, Unicron's control over Megatron does more good, for now knowing the true meaning of oppression, Megatron relinquishes his hatred and his lust for conquest permanently, leaving for parts unknown to start anew.
Unicron would reappear in the sequel series, Transformers: Robots in Disguise, set five years after the events of Predacons Rising. Although the majority of Unicron's anti-spark had been safely imprisoned in the Allspark container, an apparently-inert remnant of the anti-spark still existed with Unicron's original body at the Earth's core. Years after Unicron's final defeat, when Megatronus was freed and brought to Earth, he used a spark-merging staff to extract the anti-spark remnant from beneath the Earth; intending to use the staff to merge the anti-spark and the Allspark together so as to destroy both Earth and Cybertron. However, when the staff was broken before it could fully draw in the Allspark, the anti-spark remnant returned to the Earth's core.
In the Transformers: Rescue Bots (set in the same continuity as Prime) episode "Christmas in July", Heatwave told Boulder that his throwing skills would be insufficient to hit the backside of Unicron with a lobbing ball. Unicron is later referenced by Optimus Prime when the Burns discover a prehistoric island underneath Griffin Rock, telling them "there are many things beneath the Earth's surface humans are not aware of".
Far more than a mere product of science, as in the cartoon, Unicron was a fallen god from before the universe existed, who sought the ultimate peace that would be granted by the destruction of all life. Amazingly, Unicron accomplished this task, wiping out all life, planets, stars and nebulae, even "the stuff of space itself" in the universe and leaving only nothingness and void. His lust for destruction finally sated, Unicron entered a deep sleep - but he had not been thorough enough. Tiny fragments of the old universe reacted with each other, and a new universe was born. As Unicron slept, the core of this new universe - somehow a sentient being - became aware of Unicron's threat and created a defender to battle his evil - Primus, the lord of light. Unicron awoke to find himself surrounded by another universe, and simply began to destroy it again.
He and Primus clashed many times, the force of their battles wiping out the very life Primus had been created to protect. To stop this physical destruction, Primus shifted the battle to the astral plane, where he fared little better, forcing himself into what seemed to be a sacrifice play - in shifting the battle back to the physical universe without time to properly generate their energy forms, Primus entrapped both himself and Unicron in two barren asteroids. But this was not the end of Unicron - over the eons, he learned to psionically shape his asteroid, and transformed it into a metallic planet, and then again into a gargantuan robot. Primus, fearing that to follow suit by forming himself in a similar manner would simply pick up the conflict where it had left off, sought an alternative way to defend the universe against the threat of Unicron by turning his asteroid into Cybertron; a planet that he populated with robotic beings that, like Unicron, could alter their forms. And thus were born the Transformers.
Bhenchod Unicron's slightly convoluted comic tenure began in the United Kingdom's exclusive Transformers comic series, which interspliced its own original stories with reprinted American material. Jumping at the chance to work with a new cast of characters not involved in the American comics, writer Simon Furman decided to cannibalize the best elements of the movie and work them into his stories, creating a future universe based on the movie's events, but different from the cartoon. In the first use of this timeline, in the mega-serial, Target: 2006, Galvatron travelled back in time in an attempt to escape the control of Unicron, but Unicron was able to ensnare the minds of three Autobots - Hot Rod, Kup and Blurr - and send them back in time after him to foil his plot. Though Unicron's role in the story itself was suitably minor, it offered the first glimpse of his greater mental power.
In the UK comics' version of post-movie events, Unicron's head did not enter Cybertron's orbit, and instead crash-landed on the Planet of Junk. Still active, Unicron used his vast mental powers to enslave the minds of the Junkion natives, who set about rebuilding his body. Cyclonus, Scourge and the freelance peacekeeping agent, Death's Head, also fell prey to him, and he used them to exacerbate the stalemated war on Cybertron to keep the Autobots busy, so that they would not learn of his impending resurrection. When Death's Head fought back against Unicron's mental control, however, Unicron rewarded his temerity by revealing the comic book version of his origin. Death's Head then aided Rodimus Prime, projecting his mind into Unicron's where they battle, until Unicron's head was destroyed by explosives, and his essence was sealed within the Matrix. Rodimus and several other future Autobots subsequently traveled back in time to 1989 and participated in the "Time Wars", but when they attempted to return to their own time afterward, they discovered that disruptions to the timestream had erased their future, and replaced it with one where the Decepticons ruled Cybertron. In this dark future, Unicron's essence emerged from the Matrix and briefly took over Rodimus Prime, before he was thwarted by the removal of the Matrix from Rodimus's body. In 2010, however, Unicron attempted this again and succeeded, controlling Rodimus's body and reshaping it into his own image, before being defeated by Rodimus's own force of will.
In 1987, Simon Furman began writing the U.S. Transformers series in addition to the UK comics, and immediately set in motion an epic Unicron-themed story. Unicron soon made his presence known to the Transformers much earlier than 2005.
A battle between the Autobot Classic Pretenders and the Decepticons' Mayhem Attack Squad at the centre of Cybertron had the unfortunate side effect of waking the slumbering Primus, who was struck by a stray laser blast and awoke with a scream. Although he immediately sank back into slumber, Primus's scream echoed throughout the universe, to the fringes of known space where Unicron heard it. Now aware of his old enemy's location, Unicron immediately headed towards Cybertron, but, seeking a herald to sow chaos in his name ahead of his coming, used his formidable powers to send three agents - Hook, Line and Sinker, forward in time to an alternate future version of 2009. In this timeline, Unicron had succeeded in consuming Cybertron in the year 2005, and Galvatron and the Decepticons ruled Earth. This timeline's version of Galvatron was pulled back to 1990 by Hook, Line and Sinker and press-ganged into Unicron's service, but, like his predecessors, turned on his master by forcing Emirate Xaaron to awaken Primus in hopes of destroying Unicron. Primus possessed Xaaron's form and attempted to hold off Unicron, but he was weak, and his attack was a ruse, leading to his own destruction, which in turn (along with a direct attack by Galvatron) succeeded in galvanising the Autobots and Decepticons to attack Unicron together. Ultimately, they did little damage, and many Transformers died, before Optimus Prime was able to use the Matrix to destroy Unicron, exploding his body from within.
In contrast to his major roles in the Marvel comics, the cancellation of the Dreamwave Transformers comics meant that Unicron would play a much lesser role in events. His presence was first hinted at in the second "War Within" arc, where the Fallen enlisted the Chaos Trinity (Bludgeon, Bugly, and Mindwipe) to capture a number of Transformers (Grimlock, Blitzwing, Jetfire, and Hot Spot) for an arcane ritual to summon the Fallen's Master. It failed, due to a combined strike by Prowl's Autobots and Shockwave's Decepticons, with the Fallen being killed by Primus himself.
He would make his first mainstream appearance in volume 3, issue 1 of the main Generation One series, seemingly summoned by Shockwave at the end of the previous volume. Here it is revealed that he had dispatched Scourge at the head of a huge armada of Sweeps to search the galaxy for Cybertron. Scourge located it, but was shot in the back and deactivated by Shockwave, who used analysis of his body to create the Triple Changers. Unicron then destroyed Lithone, before beginning to journey to Earth. Dreamwave went bankrupt and the next issue was never released. Writer Chris Sarracini has indicated that he would have followed through on the Unicron storyline, and also would have had the Dreamwave version of Cyclonus rescue Scourge from US government study.
Although Dreamwave Productions' Unicron Trilogy comics were cut short halfway through their Transformers: Energon series, they were able to establish a very important piece of information that would be used to shape Unicron's story in future fiction. The Armada comic established that its version of Unicron did not merely consume worlds and seek the destruction of the singular universe - it moved from universe to universe, throughout the entire multiverse, destroying entire realities and moving on to the next until all of causality and existence was completely obliterated.
His coming in the Armada comic universe was first foreshadowed when he pulled Optimus Prime into a parallel dimension where Cybertron had been devastated. In return, Unicron sent something into our universe - the near dead Optimus Prime of the parallel universe, who warned them of Unicron's coming before dying. Subsequently Unicron sent his Heralds - alternates of the Generation 1 versions of Galvatron, Scourge, Thunderwing, Dirge, and Bludgeon - ahead to destroy those who could oppose him (including Megatron) and capture the Mini-Con Matrix.
Galvatron was eventually killed by Megatron using the Star Saber, and the other Heralds were eventually destroyed in their captured Decepticon base by an explosion engineered by Jetfire. Unaware of his Heralds' failure, Unicron now threatened to destroy Prime, but the Mini-Cons and Jetfire managed to rescue Prime, with the power of the Mini-Con Matrix upgrading them and combining them into their Powerlinked mode. They held off Unicron long enough to escape back to their universe. Unicron then came to the Armada universe himself, where he was attacked by a combined force of Autobots and Decepticons. They distracted him long enough for the Mini-Cons to access the power of the Mini-Con Matrix and destroy the Chaos-Bringer. Here Unicron never even transformed to robot mode.
Unicron survived, but his body was crippled and he no longer had the power to transform or even move. He was forced to employ servants to do his bidding: Alpha Q and the Terrorcons, who were disgruntled former Decepticons upgraded by Unicron in return for harvesting enough Energon to repower him. While they attacked Earth, a rich source of Energon, Unicron sent his four Horsemen - Rhinox, Airazor, Terrorsaur and Cheetor, absorbed by Unicron in the previous battle - against Cybertron, devastating much of it before being stopped by Optimus Prime. Many of the latter Energon stories were set inside Unicron himself as Megatron, whose Spark had also survived the previous battle, attempted to convince Prime to resurrect him in a new body, with the planet eater seemingly unaware of their actions.
Alpha Q showed signs of rebelling against Unicron, and Prime prepared to fight back from inside Unicron. However, the series was canceled before these plot threads could come to fruition. Writer Simon Furman revealed that a future storyline of the Energon comic would have included another attack by Unicron, had the series continued.
Devil's Due Publishing
Unicron made a cameo appearance in the second G.I. Joe vs the Transformers crossover produced by Devil's Due. At the end of the arc Cobra operative Doctor Mindbender would meet with the cult Cobra-La and discover they had allied themselves with Unicron. One of Optimus Prime's visions of the future showed Mindbender and Unicron as a coming threat - a prophecy that came to pass in the fourth crossover "Black Horizon".
Apparently banished from his world thousands of years ago, Unicron travelled the galaxy, devouring planets to quench his hunger and taking their populations as slaves to maintain his inner body works. However, when attacking the seemingly primitive and defenseless Earth, Unicron ran into trouble. A strange set of non-human creatures opposed Unicron, threatening to attack him with a metal devouring organic spore. Before the two sides could annihilate each other, an agreement was reached favouring both parties. The creatures would go into hiding, allowing humanity to develop. Then, when they had reached a sufficient technological level to serve as slaves for Unicron's inner workings, the creatures would call Unicron. He would destroy humanity and they would inherit the human-free world he left behind. Thousands of years later the pact would be kept and the creatures, now calling themselves Cobra-La, would summon Unicron via a beacon. Attacking a pirate vessel on the outskirts of a solar system, Unicron then journeyed to Earth. Hailed as the "Doom Star" by terrified humans, Unicron transformed to robot mode and prepared to destroy humanity. However, he was thwarted when Cosmos and Flint traveled through his mouth into his body bearing the metal-eating spores of Cobra-La. Despite the best efforts of his "anti-bodies" (the Beastformers), they delivered the spores directly to his brain. Although he was not shown to be destroyed, he was last seen entering convulsions, indicating he would no longer be a threat. It was later mentioned his body was floating around Earth.
In this continuity, Unicron is thought of as the Transformers' equivalent of the "boogeyman". The revelation that Unicron had been banished from his home planet indicates a different origin from ones used for previous incarnations of Unicron.
The storyline for the Botcon fan convention from 1998 to 2000 featured Unicron's life force ending up on prehistoric Earth following the destruction of his body in Transformers: The Movie. It would eventually be found by a lowly Predacon known as the Hunter, who fashioned a container for it that he dubbed the Decepticon Matrix of Conquest. Taking the name Shokaract, this villain seems to have become one with Unicron himself, with the pair of them laying waste to Shokaract's Cybertron and the rest of the universe. However, the instability of the timestream meant that Unicron's lifeforce, also known as the Dark Essence, was in danger of being pulled away from prehistoric Earth before the Hunter could find it, which would have undone Shokaract's timeline. Shokaract thus dispatched two of his Heralds, Antagony and Cataclysm, to safeguard the Dark Essence, only for Antagony to be captured by Megatron's Predacons and Cataclysm to perish in battle with the Maximal hero Windrazor. Shokaract himself traveled back in time to secure the Essence and destroy the Maximals, only to be engaged in battle by the Covenant of Primus. With the aid of other Transformers from across time and space, the Covenant succeeded in defeating Shokaract, and the Dark Essence of Unicron was drawn back into time, erasing Shokaract's timeline.
While writer Simon Furman had ruled out Unicron in the main IDW G1 series, this did not prevent him from using Unicron in his Beast Wars series. The series opened with a disembodied Magmatron, trapped in temporal limbo by Razorbeast at the end of The Gathering, watching the annihilation of the future Cybertron by a new version of Shokaract and Unicron. Unicron himself appeared in spectral form in issue #2, dispatching Rartorata to Earth to stop an anomaly in the timestream (the disembodied Magmatron) from interfering in the "ascending". Unicron planned to use Shokaract as a vessel through which to reemerge into the universe and destroy Cybertron. However, his plans were defeated when an unlikely alliance of Maximals and Predacons succeeded in battling his Heralds. While this was going on Ravage transported Shokaract into Magmatron's limbo realm. Realizing the truth of Unicron's intentions, Shokaract then killed himself.
In the Binaltech saga, the future Ravage seen in Beast Wars alters the original G1 timeline. His interference includes trapping all the Decepticons in a spacial rift, with the knowledge that Unicron would soon be attacking Cybertron. The plan was that the Autobots would have to face Unicron unaided, and the Decepticons would then be able to return and conquer whoever prevailed. As a result of these changes, the final showdown between Optimus Prime and Megatron does not occur, and Prime does not die. With Megatron trapped in the rift, Unicron does not encounter the Decepticon leader, and therefore does not make the Faustian Pact to reformat him into Galvatron.
Through the events of the story, Optimus Prime learns that the Matrix can destroy Unicron, and he and Ultra Magnus launch an assault on the giant. Within Unicron's body, Optimus Prime is severely damaged, and although not mortally, he passes the Matrix to Magnus, who completes the mission, and the pair escape as Unicron explodes.
Unicron again appeared as a character in the Transformers: Universe comics by 3H Enterprises, seemingly the same Unicron as seen in Armada. This time he was able to physically eat planets like his Generation 1 self. Set after Beast Wars and Beast Machines, and his defeat by the Wreckers, he gathered Transformers from across different realities to create an army. These Transformers were forced to fight inside Unicron, where he feasted on both the excess Energon they gave off and the Sparks of the losers. In response to this, Primus and Alpha Trion resurrected and reformatted Optimus Primal to lead the fight against the evil Unicron. After freeing Unicron's captives, the Chaos-Bringer gathered an army of his own, dubbed "the Decepticons", to fight against Primus, which was led by Razorclaw, an alternate version of Tigerhawk, and consisted of alternate versions of Obsidian, Tankor, and Reptilion.
Although the end of Universe did not provide a proper conclusion to the storyline, the Cybertron Club Comic would portray the ending. In "Revelations, Part 2", when Optimus Prime was called to another dimension to fight Unicron's heralds, he reflected back on the final battle between Primus's forces and Unicron's army - where Unicron would have suddenly disappeared, his existence ended by the black hole created by his defeat in Transformers: Energon.
The Transformers club comic has further developed Unicron's story for the Cybertron era, attempting to fill in the plot holes. The comic states that Primus' chosen task in Energon was to imprison and burn away Unicron's disembodied spark within a fledgling sun. This sun was the one that was born to save Alpha-Q's world. Unfortunately, Megatron's spark, also inside, interfered and the sun collapsed, trapping Unicron's spark inside (bridging it between other universes). The black hole was born, and Megatron was freed. He used pieces of Unicron to remake his body, as well as revive Starscream, his most loyal subject. The black hole itself has begun to devour space and time, unraveling historical events and building new ones. This is the reason for the "errors" in the Cybertron animated series, as it is following a constantly reshaping universe.
A new Unicron figure was released at the end of the Cybertron toy line as a Deluxe-class figure with a tank-like alternate mode. Although the character did not appear in Transformers: Cybertron or its Japanese equivalent Transformers: Galaxy Force, the Hasbro Club comic served to introduce this new version of the Chaos-Bringer. In this story, the black hole contains Unicron's essence and also links him simultaneously to all Cybertrons across the Multiverse giving him the potential to wipe out Primus in one fell swoop. This course is currently being held at bay by Transformers from across the Multiverse, usually consisting of characters derived from Convention and Club exclusives as well as Cybertron figures that play no role in the television series. In one issue, Soundwave was dispatched to Cybertron after Ramjet and Nemesis Prime's failure. He tosses the Dead Matrix into the black hole, releasing Unicron's spark which quickly overtakes a nearby world, converting its inhabitants into savage maniacs. With the destruction of the planet his body is reborn as a normal sized Transformer.
When Unicron eventually attacked Cybertron in the midst of the chaos caused by a Mini-Con civil war, Sentinel Maximus and Omega Prime fought him off with the help of their allies. In the end Unicron was driven off badly wounded again, this time by Primus himself. Unicron appears in a flashback in "The Coming Storm: Part 1".
In the comic "Hoist the Flag", set centuries later, Unicron's head proves to be the objective sought by the Star Seeker pirates under Cannonball, whose crew includes a version of Shokaract known as the Hunter.
The events of "Another Light" resulted in Unicron, Primus, and the Thirteen ceasing to be multiversal singularities, instead existing as multiple separate individuals throughout the multiverse. This resulted in a Unicron in the Shattered Glass universe who was wholly good, with a counterpart Primus who was entirely evil. This noble Unicron came across the broken Autobot forces of Optimus Prime, and offered them a chance to be reborn and enlightened. As a result, Optimus Prime was reborn as Nova Prime while his fellow Autobots were likewise reformatted; they subsequently returned to Cybertron and overthrew Rodimus Prime.
While Unicron did not appears in the Transformers film series, he still appeared in the comics.
Note: Information in italics occur in the alternate storyline where Megatron won the battle for the Allspark.
Cybertron's status was unknown, with everyone abandoning it as it began to die. However, Stockade and a group of Decepticons remained, staying alive by using Nucleon. Stockade believed they could renew Cybertron by summoning a new power source, one related to the AllSpark. They succeeded in summoning such an energy being, which did enter Cybertron to renew it and to everyone's horror, announced itself as Unicron, the Anti-Life!
The possessed Cybertron was swiftly altered into a scarier-looking form with a large mouth and grasping prongs, turned hostile to those on it, and warped to the Sol system. The Autobots and Decepticons were able to destroy Unicron, but Cybertron was left in its transformed state and seemingly in the Sol system, as well as continuing to be dead and powerless.
When the Autobots were ordered off American soil, they regrouped under Cybertron and began working on the teleportation engines that Unicron had left there when he transformed the planet. Using these, they were able to make a decisive strike by teleporting the entire Decepticon army to Cybertron, then teleporting Cybertron to the far reaches of space. With the engines now burnt out and no energy on the planet, the Decepticons were marooned there, at the cost of the Autobots never being able to go home.
In conjunction with the Combiner Wars (Unite Warriors in Japan) line, Takara Tomy released a comic detailing how the Galvatronus combiner came to be. Following his defeat at the conclusion of The Headmasters, Galvatron's icy tomb was discovered by Cyclonus, whose body Galvatron modified to accommodate his own head in the chest compartment. Seeking a more fitting form, Galvatron directed Cyclonus to approach the disembodied head of Unicron, who was convinced to help Galvatron attain a combiner form with Cyclonus as it's core. To accomplish this, Unicron used his power to open dimensional rifts in order to bring Curse Armada Thrust, Zombie War Breakdown, and Wandering Roller into their world. To Cyclonus' surprise, Starscream then made an appearance, expressing interest in joining this new alliance. Unicron promptly granted Starscream a new physical form, and Galvatron's head took control of his new minions to take on his new form of Galvatronus. 
Unicron is among the characters appearing in the 2004 Transformers video game for the PlayStation 2. Unicron begins attacking Cybertron, requiring the Autobots to collect enough Mini-cons to create a power-up mode for Optimus Prime. The player must chase Unicron as he orbits around Cybertron and enter his maw as he prepares to fire, blasting him with the Matrix Cannon until eventually Unicron is destroyed.
Unicron is mentioned a number of times in Transformers: Prime – The Game. Eons ago Unicron created Thunderwing to serve him and destroy the Matrix of Leadership. After Unicron's demise a meteor of Dark Energon with Thunderwing sealed within crashed on Earth, Optimus Prime came across the meteor and found Thunderwing who revealed that he was a minion of Unicron and his mission was to destroy the Matrix. Thunderwing even went as far as to seek help from the Decepticons for the repairs needed. However he failed thanks to the combined efforts of Prime and Jack Darby and fell into a volcano.
Unicron is mentioned in Transformers: Devastation, though not by name. in the game, after tapping into the computer banks of the Proudstar, the flagship of Nova Prime, Optimus Prime learns that Nova Prime has encountered a powerful evil that corrupted him, turning the once valiant Prime evil and propelling him into cyberforming inhabited worlds before crashlanding on Earth, putting Nova Prime into deep stasis. Optimus also learns that the evil is making its way to Cybertron, destroying worlds along the way. The Proudstar's computer, Teletraan Alpha, makes cryptic prophecies of the future, stating that some of the Autobots like Optimus and Wheeljack will die when the evil comes. All this serves as a prelude to the events of The Transformers: The Movie.
Unicron is mentioned a number of times in the novels Transformers: Exodus, Transformers: Exiles and Transformers: Retribution. Unicron was defeated in his attempt to destroy Cybertron very early in its history, but emanations of his presence remained and were gathered and stored on Trypticon Station. This substance was a violently addictive poison that could pass on to another bot once its user died, and was dubbed the Sparks of Unicron or Dark Energon. Ultimately Megatron achieved what Unicron did not by contaminating the core with Dark Energon, forcing the planet to shut down and reboot. His name is also used by the Decepticons as an oath, and their ideology seems to include holding him in a sense of reverence similar to how the Autobots regard Primus. The Quintessons, during their attempt to convince Megatron that they could deliver to him a Decepticon Matrix of Leadership, indicated that the artifact-which in fact did not exist-was created by Unicron.
- Generation 1 Unicron (unreleased)
- A prototype was created for a Unicron toy as far back as 1986, but owing to cost concerns, it never made it into production.
- Beast Wars Neo Unicron (unreleased)
- A giant, top heavy Unicron toy with a "shell" type transformation intended for release in Japan circa 2000, which exists only as a prototype.
- Armada Unicron with Dead End (2003)
- The Armada figure came with its own Mini-Con, which transforms into a cannon-equipped 'moon' to Unicron's 'planet', looking very similar to the Death Star of Star Wars fame. At various points in production, Unicron's Mini-Con was originally going to be called Nebulon, the name of the homeworld of the Headmaster, Targetmaster and Powermaster partners, and also Gobotron, the homeworld of the Transformers' competitive toyline in the 80's, the Go-Bots. Designer Aaron Archer did not want such a historical action figure to be overshadowed by a Go-Bots pun, so the name was changed to Dead End, re-using a name of one of the original Stunticons. A multitude of these Mini-Cons were featured in the Armada cartoon, although they were portrayed simply as non-transforming internal defensive "laser pods," instead of actual Mini-Cons.
- This toy was voted the 52nd top toy released in the last 10 years by ToyFare magazine.
- Micron Legend Lucky Draw Unicron with Bug (2003)
- A green redeco of the Armada Unicron, limited to 10 units and given away as part of the Micron Legend Yearbook 2003 mail-in contest in Japan.
- Energon Unicron with Dead End (2004)
- A redeco of the Armada toy.
- Energon McDonalds Unicron (2004)
- Given away as a Happy Meal toy in Europe and Australia.
- Cybertron Deluxe Unicron (2005)
- A Deluxe size figure. The figure was packaged on a Decepticon cardback, and that the character's profile in the Transformers Collectors' Club magazine also included a Decepticon symbol. The actual story featuring the character, however, continued to present him as unaffiliated, serving only his own ends. In line with this, the toy lacks a faction symbol - a rare but not unheard of occurrence in the Transformers line, with examples including Micromasters, the Generation 2 Go-Bots, Cybertron Safeguard, SDCC exclusive Skywarp, and movie Armorhide).
- Titanium 3 inch Unicron
- A three-inch tall Decepticon which doesn't transform. It is packaged holding one of Cybertron's moons.
- Robot Heroes Optimus Prime and Unicron
- Unicron is again sold as a Decepticon in this two-pack.
- Universe Unicron with Dead End (2008)
- A Toys "R" Us exclusive re-release of the Armada figure.
- Transformers 2010 Unicron (2010)
- A redeco and remold of the Armada Unicron figure was released in late 2010 as part of Takara Tomy's "Welcome to Transformers 2010" promotion, which celebrates the year in which the third season of The Transformers was set in Japan. Designed to resemble Unicron as seen in The Transformers: The Movie, pre-release photos issued by Takara Tomy show a new head and changes to the molding of the torso, as well as deco based on his movie appearance. He retains the Mini-Con partner.
- Generations 25th Anniversary Unicron (2011)
- The U.S. release of the 2010 Unicron redeco is an Amazon.com exclusive to commemorate the 25th anniversary of The Transformers: The Movie. The included Dead End Mini-Con is renamed Kranix (after the last remaining inhabitant of the planet Lithone).
- Transformers Prime Voyager Class Gaia Unicron (2012)
- A Japanese release.
- Kre-O Transformers Kreon Micro-Changer Galvatron (2012)
- Part of the blind packed preview wave of Kreon Micro-Changers. His package has the identifying number 8 as the last digit on the serial number at the bottom of the package. A being called UniKREON is mentioned as Galvatron's boss in the Kre-O: Transformers continuity.
- Some toys and Fun Publication/3H Enterprise comics have given him the arbitrary affiliation of Decepticon.
- Swansburg, John., "When Orson Welles Was a Transformer", Slate.com, 2007-07-02, Retrieved on 2010-10-09.
- "Transformers (Video Game 2004)". IMDB.
- "A brief history of the Transformers". Malaysia Star. Retrieved 2010-10-09.
- 2000 meters per pixel at Jeff Russell's Starship Dimensions
- A shot of Unicron standing on top of Cybertron shows his robot mode to be not quite a planetary diameter tall.
- *Furman, Simon (2004). Transformers: The Ultimate Guide. DK Publishing Inc. pp. 40–51. ISBN 1-4053-0461-8.
- Tformers.com (2010-11-25). "First Look at Transformers Prime Screeners Review - * SPOILERS! Ahead* Transformers". Tformers.com. Retrieved 2012-02-16.
- List of Transformers: Prime episodes#Season 2 (2012)
- Forest Lee and Dan Khanna (w), Forest Lee (p). Transformers: Cybertron: Balancing Act 1 (April 2007), IDW Publishing
- Atari Begins the ``Ultimate Conflict with Worldwide Release of 'TRANSFORMERS' Video Game, Business Wire, May 12, 2004
- Toyfare Magazine issue #122
- TRANSFORMERS CYBERTRON Deluxe Class: UNICRON Figure- Product Detail
- "Unicron - Toy Gallery - Photo #9". Seibertron.com. Retrieved 2012-02-16.
- TRANSFORMERS TITANIUM SERIES Die-Cast UNICRON Figure- Product Detail
- Transformers Robot Heroes: Optimus Prime And Unicron- Product Detail
- Takara Tomy - Unicron
- TFW2005.com - Unicron (Amazon Exclusive)
- TFW2005.com - San Diego Comic-Con 2011 Hasbro Booth - Amazon.com Unicron in Box
- Unicron at the Internet Movie Database
- Beast Wars Neo Unicron Prototype
- Unicron at TFWIKI.Net, the Transformers Wiki