List of Sonic X episodes

Sonic X is an anime series based on the Sonic the Hedgehog video game series. It originally ran consecutively on Sundays from April 6, 2003 to March 28, 2004 with a total of 52 episodes (collectively known as the Japanese "Series 1"). In Japan, episodes 53–78 ("Series 2") initially went unaired on television, becoming direct-to-video releases. Episodes 53–78 were first broadcast on TV in France and parts of Asia before they aired on UK/US television.

As part of Kids Station's 2020 line-up of programming, it was announced that, as part of a tie-in promotion for the Sonic the Hedgehog film, the network would finally begin broadcasting the remaining episodes in 2020. This would mark the first time that the episodes would air in any format on Japanese television.

For the English dub produced by 4Kids (which aired on Fox's Saturday morning block FoxBox, later renamed 4Kids TV from August 23, 2003 to May 6, 2006), episodes 1–52 were referred to as Seasons 1–2, each 26 episodes long, and episodes 53–78 were referred to as Season 3, but the Saga Set DVD releases split the episodes into 6 seasons, each containing 13 episodes. The airdates for TV Tokyo are listed on the left, while the airdates for the 4Kids English dub are on the right. For Season 3, air dates for the Japanese run reflect the first date of Kids Station's broadcasts.

Series overview

Season	Episodes		Originally aired
			First aired	Last aired
1	26		April 6, 2003 (2003-04-06)	September 28, 2003 (2003-09-28)
2	26		October 5, 2003 (2003-10-05)	March 28, 2004 (2004-03-28)
3	26		March 12, 2005 (2005-03-12)	April 18, 2005 (2005-04-18)

Episode list

Season 1: The New World and Chaos Emerald Sagas (2003)

No.	Title	Directed by	Written by	Storyboarded by	Original air date	American air date
1	"The Supersonic Hero Takes the Stage!" ("Chaos Control Freaks") Transliteration: "Chōonsoku hīrō tōjō!" (Japanese: 超音速ヒーロー登場！)	Hajime Kamegaki	Hiro Masaki	Hajime Kamegaki	April 6, 2003 (2003-04-06)	August 23, 2003 (Sneak Peek) September 6, 2003 (Series Premiere)
Following a battle between Sonic the Hedgehog and Dr. Eggman, a device powered by the seven Chaos Emeralds is damaged, causing them to create an energy blast known as Chaos Control to engulf the surrounding area. When Sonic awakens after blacking out, he finds himself on a different world populated by humans, and quickly becomes the centre of attention for the police, including a hi-speed pursuit team led by Sam Speed.
2	"Infiltrate Area 99!" ("Sonic to the Rescue") Transliteration: "Sennyū! Eria 99" (Japanese: 潜入！エリア９９)	Keiichirō Furuya	Hiro Masaki	Kazuhide Tomonaga	April 13, 2003 (2003-04-13)	September 13, 2003
Following his arrival to Station Square, Sonic befriends young boy Chris Thorndyke, and his grandfather Chuck. When he learns that Cream the Rabbit and her pet Chao Cheese have turned up in this world, Chris and Chuck join him in rescuing the pair from a top secret military base - Area 99. For Sonic, the task is not easy, until some surprising help arrives in the form of his best friend Miles "Tails" Prower.
3	"Dr. Eggman's Ambition" ("Missile Wrist Rampage") Transliteration: "Dr. Eggman no yabō" (Japanese: Ｄｒ．エッグマンの野望)	Keiko Oyamada	Hiro Masaki	Toshihiko Masuda	April 20, 2003 (2003-04-20)	September 20, 2003
Dr. Eggman decides to take advantage of his arrival to Earth by seeking to conquer Station Square, and soon causes havoc for the city's police. Amy Rose and Knuckles the Echidna, who happen to have turned up in the city's sewers, soon find Tails, accompanied by Chris, trying to stop him, and soon led a hand. But Sonic, who suspected his nemesis is likely active on this planet, must step in to save the day, especially when Amy gets into trouble.
4	"Get the Chaos Emerald!" ("Chaos Emerald Chaos") Transliteration: "Kaosu Emerarudo o te ni irero!" (Japanese: カオスエメラルドを手に入れろ！)	Masafumi Satō	Hiro Masaki	Kazuyoshi Yokota	April 27, 2003 (2003-04-27)	September 27, 2003
After Eggman's attack, the President authorizes operations to gather information on him and Sonic. Meanwhile, a Chaos Emerald turns up at a construction site, after causing machinery to malfunction. Both Sonic and Eggman soon learn of this and swiftly move in to grab the gem. Chris himself joins in the hunt, unaware his new teacher, Mr Stewart, is an undercover spy tasked with investigating him and keeping him under watch.
5	"Clash!! Sonic vs. Knuckles" ("Cracking Knuckles") Transliteration: "Gekitotsu!! Sonikku vs Nakkuruzu" (Japanese: 激突！！ソニックｖｓナックルズ)	Keiichirō Furuya	Kiyoko Yoshimura	Kazuhide Tomonaga	May 4, 2003 (2003-05-04)	October 4, 2003
Knuckles is surprised when Eggman turns up one night, claiming Sonic seeks to keep him and the others stuck on Earth. Enraged, he soon challenges Sonic to a fight for the Chaos Emerald he acquired. Unknown to him, Eggman is not only manipulating Knuckles, he also is seeking to attract Sonic's friend to a mountain valley, hoping to use them as hostages in case Sonic gets wise to his scheme.
6	"Fierce Battle! School Wars" ("Techno-Teacher") Transliteration: "Nessen! Sukūru wōzu" (Japanese: 熱戦！スクール・ウォーズ)	Naoyuki Kuzuya	Yoshio Urasawa	Kōji Hōri	May 11, 2003 (2003-05-11)	October 11, 2003
Eggman decides to send a robot to Chris' school, in hopes of brainwashing the students into liking him. Unfortunately, the robot goes against its orders and seeks out the kid's admiration for itself, forcing Eggman to remind them who it's boss is. Meanwhile, Chris' parents, Nelson Thorndyke and Lindsey Fair turn up, hoping to see their son during their free time from their busy lives.
7	"Giant Free-For-All! Chris' House Party" ("Party Hardly") Transliteration: "Daikonsen! Kurisu no hōmu pāti" (Japanese: 大混戦！クリスのホームパーティ)	Keiko Oyamada	Chinatsu Hōjō	Toshihiko Masuda	May 18, 2003 (2003-05-18)	October 18, 2003
Lindsey decides to hold a house party, in hopes of having some good times with Chris. While her son delights in this, he soon becomes worried when Mr. Stewart decides to make a home visit. This soon prompts Chris to try to keep the presence of Sonic and his friends in the house secret from everyone, including the maid Ella, with help from Mr. Tanaka, the family butler, and Chuck. But a homesick Cream and Cheese soon complicate things.
8	"Emergency Takeoff! X-Tornado" ("Satellite Swindle") Transliteration: "Kinkyū hasshin! X Torunēdo" (Japanese: 緊急発進！Ｘトルネード)	Makoto Bessho	Masahiko Shiraishi	Makoto Bessho	May 25, 2003 (2003-05-25)	October 25, 2003
Eggman deploys a new robot to head into Earth's stratosphere and wreck havoc by swallowing satellites, which panicks the military. Upon revealing his scheme to Sonic, he and Tails attempt to stop him with the Tornado, only for the bi-plane to prove ineffective. When Tails decides to use the Chaos Emerald as a power source, he and Chuck set to work developing a new plane that can destroy Eggman's robot - the X Tornado.
9	"Amy at the Beach" ("The Last Resort") Transliteration: "Nagisa no Emī" (Japanese: 渚のエミー)	Keiichirō Furuya	Kiyoko Yoshimura	Kazuhide Tomonaga	June 1, 2003 (2003-06-01)	November 1, 2003
Tails, Amy, Cream and Cheese head to the Emerald Coast for some fun at the Thorndye's private villa, whilst Chris is attending the opening ceremony of a new resort in the area. During her time there, Amy wishes for a chance for Sonic to finally accept her love, prompting her to make a good luck charm for him. Unfortunately, Eggman turns up to spoil things, intent on creating his own beach resort area, while holding Chris, Ella and Tanaka hostage.
10	"Fierce Fight! Sonic Baseball Team" ("Unfair Ball") Transliteration: "Gekitō! Sonikku yakyūgun" (Japanese: 激闘！ソニック野球軍)	Masafumi Satō	Mutsumi Mikuni	Masafumi Satō	June 8, 2003 (2003-06-08)	November 8, 2003
Tails befriends a local groundskeeper of a baseball stadium that is set to be demolished soon, and is surprised when he learns they found another Chaos Emerald recently. When the Emerald signals its presence, Eggman decides to issue a challenge to Sonic and the others - a game of baseball, where the winner walks away with both Emeralds. But as Sonic and his friends find out, Eggman is determined to ensure he wins with his robotic baseball team.
11	"The Beautiful, Mysterious Thief, Rouge" ("Fly Spy") Transliteration: "Utsukushiki kaitō Rūju" (Japanese: 美しき怪盗ルージュ)	Keiko Oyamada	Hiro Masaki	Toshihiko Masuda	June 15, 2003 (2003-06-15)	November 15, 2003
The Presidents orders a specialist team to grab Sonic in order to acquire his help against Eggman. However, they end up capturing Rouge the Bat, who was sent to Earth by Chaos Control and has been busy with a crime spree. Offered immunity for her crimes, Rouge agrees to be a spy for the government, and finds herself paired up with special agent Topaz for a mission to gather information on Eggman's base. Meanwhile, Chris introduces his friend Danny to Sonic and the others.
12	"Assault on Eggman's Base! (Part I)" ("Beating Eggman, Part 1") Transliteration: "Egguman kichi sōkōgeki! (zenpen)" (Japanese: エッグマン基地 総攻撃！（前編）)	Naoyuki Kuzuya	Hiro Masaki	Naoyuki Kuzuya	June 22, 2003 (2003-06-22)	November 22, 2003
The President decides to authorize an attack on Eggman's base, assigning Rogue and Topaz to lead the assault while the airforce and navy act as decoys. Meanwhile, Tails, Amy and Chris, accompanied by Chris' friend Francis, seek out a third Chaos Emerald outside the city, unaware the government have let slip this knowledge to Eggman to distract him. As the battle rages on, Sonic soon has to rush out to rescue his friends when Eggman endagers them.
13	"Assault on Eggman's Base! (Part II)" ("Beating Eggman, Part 2") Transliteration: "Egguman kichi sōkōgeki! (kōhen)" (Japanese: エッグマン基地 総攻撃！（後編）)	Eiichi Kuboyama	Hiro Masaki	Satoshi Kimura	June 29, 2003 (2003-06-29)	November 29, 2003
Rouge and Topaz find themselves receiving aid from Knuckles to help them destroy the base, but Eggman's robots, Becoe and Decoe, trap them inside when they plant the charges. Meanwhile, Sonic arrives to rescue his friends, but Eggman is not deterred from stealing the Emerald they were searching for. Forced to chase after them, they swiftly become embroiled on the fight on Eggman's base, culminating in a clash for the stolen Emeralds.
14	"Chase After the Hero, Sonic!" ("That's What Friends Are For") Transliteration: "Eiyū Sonikku o oe!" (Japanese: 英雄ソニックを追え！)	Keiko Oyamada	Yoshio Urasawa	Kenji Yazaki	July 6, 2003 (2003-07-06)	December 6, 2003
The President's aide decides to hold a party in honor of Sonic, after he becomes a huge celebrity for his actions in defeating Eggman, in hopes it will improve the President's approval rating. But when only Sonic's friends turn up, he swiftly calls in the military to track him down. This proves a problem for Sonic, who is seeking to uphold a promise to Chris' wheelchair-bound friend Helen to take her somewhere special her father told her about.
15	"Attack of the Mobile Fortress, Egg Fort!" ("Skirmish in the Sky") Transliteration: "Idōyōsai Eggu Fōto shūrai!" (Japanese: 移動要塞エッグフォート襲来！)	Toshikiyo Ishikawa	Kiyoko Yoshimura	Toshihiko Masuda	July 13, 2003 (2003-07-13)	December 13, 2003
Chris and Ella take Tails, Amy, Cream and Cheese into the city to enjoy some free time now that they can be seen in public. Unfortunately, the group find it difficult to do much, owing to their celebrity status. Then matters become worse when Eggman returns, this time with a new flying fortress aimed at leveling Station Square. As Sonic arrives to prevent this, the others find themselves receiving unexpected help as they attempt to get the X-Tornado.
16	"Aim for It! The Sunken Ship of the Southern Sea" ("Depths of Danger") Transliteration: "Mezase! Nankai no chinbotsusen" (Japanese: 目指せ！南海の沈没船)	Masafumi Satō	Chinatsu Hōjō	Masafumi Satō	July 20, 2003 (2003-07-20)	January 17, 2004
Seeking some time away from the city, Sonic and the others travel to an island in the Blue Sapphire Sea. However, they soon put up readings for a new Chaos Emerald, and quickly find it underwater. After Sonic and Chris make a couple of attempts, they soon decide to get scuba gear to search for the Emerald. But Eggman, annoyed that Sonic is having fun, decides to spoil things, especially when he learns about the Emerald.
17	"Knuckles! Fist of Fury" ("The Adventures of Knuckles and Hawk") Transliteration: "Nakkuruzu! Ikari no tekken" (Japanese: ナックルズ！怒りの鉄拳)	Hiroshi Kimura	Masahiko Shiraishi	Toshihiko Masuda	July 27, 2003 (2003-07-27)	January 24, 2004
Knuckles befriends a treasure hunter called Hawk during his travels, who later contacts him with news that he may have found a Chaos Emerald. After a run in with a local gang, Knuckles and Hawk find themselves dealing with a female ninja robot sent by Eggman to steal the Emerald. After a battle buries the Emerald, Knuckles assumes things will not get better, until he learns Hawk found something else that might aid him. Notes: The episode's Japanese title is a reference to the 1972 Hong Kong martial arts film of the same name.
18	"Huge Shoot-out on the Savannah!" ("The Dam Scam") Transliteration: "Sabanna no dai kettō!" (Japanese: サバンナの大決闘！)	Makoto Moriwaki	Hiro Masaki	Naoyuki Kuzuya	August 3, 2003 (2003-08-03)	January 31, 2004
Following a battle with Eggman over a vast savannah plain, Tails and Chris become separated from Sonic. After repairing the X-Tornado, the pair find themselves discovering a pair of suspicious men constructing a dam in a nature reserve and seek to stop this. Meanwhile, Sonic finds himself pursued by Eggman's latest robot, which is able to camoflage itself amongst natural plants and rocks, prompting the blue hedgehog to think on his feet to beat it.
19	"The Ghost of the Old Castle, King Boom Boo" ("Sonic's Scream Test") Transliteration: "Kojō no bōrei Kingu Būbu" (Japanese: 古城の亡霊キングブーブ)	Keiko Oyamada & Sim Sang-il	Hiro Masaki	Toshihiko Masuda	August 10, 2003 (2003-08-10)	February 7, 2004
Chris and his friends come to an old castle by the lake to watch Chris' mother Lindsay film a movie. However, the filming is temporarily halted due to a strange noise that occurs during the shooting. In fact, someone has moved the hourglass that had sealed the demons that live in the old castle. As a result, various mysterious phenomena occur there. King Boom Boo is based on the same boss that Knuckles fought in Sonic Adventure 2.
20	"Departure! Egg Fort II" ("Cruise Blues") Transliteration: "Shutsugeki! Eggu Fōto II" (Japanese: 出撃！エッグフォートII)	Nana Harada	Hiro Masaki	Hajime Kamegaki	August 17, 2003 (2003-08-17)	February 14, 2004
Sonic and his friends are enjoying their trip on a luxury cruise ship. Sonic, who runs at supersonic speeds, is frustrated by the slow and sluggish journey of the ship. When his stress reaches its peak, Sonic takes outrageous action.
21	"Speed Match! Sonic vs. Sam" ("Fast Friends") Transliteration: "Supīdo shōbu! Sonikku vs Samu" (Japanese: スピード勝負！ソニックｖｓサム)	Yukio Okazaki	Yoshio Urasawa	Toshihiko Masuda	August 24, 2003 (2003-08-24)	February 21, 2004
The S-team leader (Sam) suddenly comes to Chris' house and challenges Sonic to a race showdown. Apparently it is a race put on by a presidential aide to increase the president's popularity. Sonic reluctantly joins the race. The race showdown between Sonic and the S-team leader begins.
22	"Summer Vacation - Chao Observation Diary" ("Little Chao Lost") Transliteration: "Natsuyasumi Chao~ na kansatsu nikki" (Japanese: 夏休み・チャオ〜な観察日記)	Masafumi Satō	Kiyoko Yoshimura	Kōichi Sasaki	August 31, 2003 (2003-08-31)	February 28, 2004
During summer vacation, Chris is enjoying a summer camp in an island country with Tails and his schoolmates. Suddenly, a huge Eggman mecha descends on the mountain to catch Chris and his friends, causing the mountain to collapse and the river to overflow, creating a big mess.
23	"Mayhem! The Sixth Chaos Emerald" ("Emerald Anniversary") Transliteration: "Daikonran! 6 Kaosu Emerarudo" (Japanese: 大混乱！６カオスエメラルド)	Keiko Oyamada & Sim Sang-il	Chinatsu Hōjō	Toshihiko Masuda	September 7, 2003 (2003-09-07)	March 6, 2004
Chris' dad has purchased a ring (actually a Chaos Emerald) from a jewelry store and is going to give it to his mom as a wedding anniversary present. Chris' mom, an actress, is filming at the studio that day, and Chris' dad has secretly planned a fancy surprise party by calling Chris, Chuck, and the S-team leader to the studio, but when Eggman, Rouge, and Topaz notice the Chaos Emerald, they come crashing in like an avalanche and wreak havoc.
24	"Runaway Sonic! Big Capture Operation" ("How to Catch a Hedgehog") Transliteration: "Bōsō Sonikku! Hokaku daisakusen" (Japanese: 暴走ソニック！捕獲大作戦)	Makoto Moriwaki	Masahiko Shiraishi	Kōji Hōri	September 14, 2003 (2003-09-14)	March 13, 2004
Sonic, who has fought Eggman, suddenly starts to run out of control. Chuck, Tails, and the others begin their mission to capture Sonic in order to somehow stop him from running all around. Knuckles, Amy, and Sam Speed join them, and the situation becomes precarious.
25	"The Last Chaos Emerald" ("A Dastardly Deed") Transliteration: "Saigo no Kaosu Emerarudo" (Japanese: 最後のカオスエメラルド)	Yukio Okazaki	Hiro Masaki	Toshihiko Masuda	September 21, 2003 (2003-09-21)	March 20, 2004
Knuckles believes that the only way to get the seventh Chaos Emerald quickly is to cooperate with Eggman, so he comes to persuade Sonic. However, he can not meet Sonic, and Chris, who hears his plan, goes with Knuckles to the forest where Eggman is.
26	"Birth! Super Sonic" ("Countdown to Chaos") Transliteration: "Tanjō! Sūpā Sonikku" (Japanese: 誕生！スーパーソニック)	Hajime Kamegaki	Hiro Masaki	Hajime Kamegaki	September 28, 2003 (2003-09-28)	March 27, 2004
Chris thinks that he has to return Sonic and the others to their own world as soon as possible, so he gives the Chaos Emeralds that Chuck has been keeping to Eggman. Sonic and his friends rush after him. However, Eggman finally finds the last of the Chaos Emeralds. The original Japanese TV broadcast uses an insert song "Kotoba ni Dekinai" by OFF COURSE, while the home video release uses an instrumental of "The Shining Road."

Season 2: The Chaos, Shadow, Egg Moon, Emerl, and Homebound Sagas (2003–04)

No. overall	No. in season	Title	Directed by	Written by	Storyboarded by	Original air date	American air date
27	1	"The Beginning of the Disaster" ("Pure Chaos") Transliteration: "Wazawai no hajimari" (Japanese: 災いのはじまり)	Kazuyoshi Yokota	Kiyoko Yoshimura	Kazuyoshi Yokota	October 5, 2003 (2003-10-05)	September 18, 2004
After defeating Eggman, peace seems to have returned to the world, but Eggman has begun new activities. He develops a new E-100 series of Eggman robots with small animals embedded as piloting components, and begins rampaging again with a monster named "Chaos" in tow. Pure Chaos (a.k.a. The Beginning of the Disaster) is a prequel to Sonic Adventure.
28	2	"The Mysterious Lifeform, Chaos" ("A Chaotic Day") Transliteration: "Nazo no seimeitai Kaosu" (Japanese: 謎の生命体カオス)	Masafumi Satō	Kiyoko Yoshimura	Kazuhito Kikuchi	October 12, 2003 (2003-10-12)	September 25, 2004
Sonic fights the evolved Chaos and chases after it, but ends up crashing in an aerial battle with the Egg Carrier. Meanwhile, Amy finds a small bird that has fallen from the Egg Carrier and is kidnapped by E-100 ZERO.
29	3	"Amy the Captive" ("A Robot Rebels") Transliteration: "Toraware no Emī" (Japanese: 囚われのエミー)	Keiko Oyamada & Sim Sang-il	Chinatsu Hōjō	Toshihiko Masuda	October 19, 2003 (2003-10-19)	October 2, 2004
Chris and Big find the missing Froggy, but E-102 Gamma snatches it away. Chris and Big follow and infiltrate the Egg Carrier. Eggman orders Gamma to bring Amy's little bird from the jail, but for some reason Gamma becomes distressed in front of the jail and releases Amy and the little bird from jail.
30	4	"Battle on the Egg Carrier" ("Heads Up, Tails!") Transliteration: "Eggu Kyaria no tatakai" (Japanese: エッグキャリアの戦い)	Shigeru Yazaki	Yoshio Urasawa	Hiro Masaki	October 26, 2003 (2003-10-26)	October 9, 2004
Sonic and Tails land on the Egg Carrier with the X-Tornado and try to take out E-102 Gamma, but are stopped by Amy. Meanwhile, Big and Chris find Froggy, but they meet Chaos and Eggman. Then Sonic arrives and decides to fight Chaos.
31	5	"Gamma the Wanderer" ("Revenge of the Robot") Transliteration: "Sasurai no Ganma" (Japanese: さすらいのガンマ)	Makoto Moriwaki	Masahiko Shiraishi	Makoto Moriwaki	November 2, 2003 (2003-11-02)	October 16, 2004
Sonic finds and breaks into Eggman's underground base, Final Egg. At the time, Gamma sets his friends free everywhere, but then E-101 Beta appears and they end up fighting.
32	6	"The Scream of Perfect Chaos" ("Flood Fight") Transliteration: "Pāfekuto Kaosu no sakebi" (Japanese: パーフェクトカオスの叫び)	Nana Harada	Masahiko Shiraishi	Toshiki Hirano	November 9, 2003 (2003-11-09)	October 23, 2004
Chaos, who has been defeated, turns out to be alive. Reaching its Perfect form, Chaos goes berserk and terrorizes the city by running amok, refusing to listen to Eggman. At that moment, Sonic's body suddenly begins to glow. Flood Fight (a.k.a. The Scream of Perfect Chaos) is the last episode to use the plot of Sonic Adventure.
33	7	"The Mystery of Project Shadow" ("Project: Shadow") Transliteration: "Purojekuto Shadō no nazo" (Japanese: プロジェクトシャドウの謎)	Keiko Oyamada & Eom Sang-yong	Hiro Masaki	Toshihiko Masuda	November 16, 2003 (2003-11-16)	October 30, 2004
Eggman hacks into GUN's computer and learns that his own grandfather (Gerald Robotnik) is connected to GUN's important secret "Project Shadow." He then infiltrates Prison Island with Decoe and Bocoe in tow to obtain it. Project: Shadow (a.k.a. The Mystery Of Project Shadow) is a prequel to Sonic Adventure 2.
34	8	"Sonic the Fugitive" ("Shadow Knows") Transliteration: "Tōbōsha Sonikku" (Japanese: 逃亡者ソニック)	Masafumi Satō	Masahiko Shiraishi	Kazuhito Kikuchi	November 23, 2003 (2003-11-23)	November 6, 2004
Sonic has been captured by GUN. Apparently, GUN believes that Sonic has sneaked into Prison Island to steal the secret of "Project Shadow." Sonic, having no idea what is going on, escapes from GUN's helicopter and is pursued.
35	9	"Escape from Prison Island" ("Sonic's Big Break") Transliteration: "Purizun Airando kara no dasshutsu" (Japanese: プリズンアイランドからの脱出)	Ichizō Fukushima	Chinatsu Hōjō	Jōhei Matsuura	November 30, 2003 (2003-11-30)	November 13, 2004
Sonic is put in an isolation cell on Prison Island. Chris and Tanaka go on a swan boat to rescue Sonic, while Amy and Tails also go on the X-Tornado. Eggman, along with Shadow and Rouge, attempts to infiltrate Prison Island again to get the Chaos Emeralds.
36	10	"Threat from Outer Space" ("Shadow World") Transliteration: "Uchū kara no kyōhaku" (Japanese: 宇宙からの脅迫)	Shigeru Yazaki	Hiro Masaki	Seiji Okuda	December 7, 2003 (2003-12-07)	November 20, 2004
Prison Island is blown up and Chris is caught in Shadow's Chaos Control, escaping the blast. He finds himself in the Space Colony ARK, floating in outer space.
37	11	"Battle on the Space Colony ARK" ("Robotnik's Revenge") Transliteration: "Supēsu koronī Āku no tatakai" (Japanese: スペースコロニー・アークの戦い)	Mamoru Enomoto	Kiyoko Yoshimura	Toshihiko Masuda	December 14, 2003 (2003-12-14)	November 27, 2004
In order to stop Eggman's ambition to destroy the Earth, Sonic and his friends take a rocket to the Space Colony ARK. Sonic infiltrates inside, but is caught and thrown out into space.
38	12	"Maria's Wish, Everyone's Wish" ("Showdown In Space") Transliteration: "Maria no negai, minna no negai" (Japanese: マリアの願い、みんなの願い)	Nana Harada	Kiyoko Yoshimura	Toshiki Hirano	December 21, 2003 (2003-12-21)	December 4, 2004
Sonic and Shadow decide to fight. However, the computer of the Space Colony ARK has gone out of control. If nothing is done, the ARK will collide with the Earth. Showdown In Space (a.k.a. Maria's Wish and Everyone's Wish) is the last episode to use the plot of Sonic Adventure 2.
39	13	"The Chaotix Detective Agency" ("Defective Detectives") Transliteration: "Kaotikusu tantei jimusho" (Japanese: カオティクス探偵事務所)	Makoto Moriwaki	Yoshio Urasawa	Hajime Kamegaki	December 28, 2003 (2003-12-28)	December 11, 2004
Sonic and friends' world and the human world have merged. Vector, Espio, and Charmy show up and start wandering the streets, looking for Cream. Meanwhile, Eggman reforms and claims he will repair the destroyed moon himself. Defective Detectives (a.k.a. The Chaotix Detective Agency) aired 2 days before the release of Sonic Heroes in Japan.
40	14	"Eggman Company" ("Sunblock Solution") Transliteration: "Egguman kabushikigaisha" (Japanese: エッグマン株式会社)	Masafumi Satō	Hiro Masaki	Matsuo Asami	January 4, 2004 (2004-01-04)	December 18, 2004
Suddenly, Eggman's artificial moon covers the sun and the world is enveloped in darkness. The reformed Eggman proposes a sunlight supply service to the president, which is well received by the citizens, but it is a ruse by Eggman.
41	15	"Give Us the Light!" ("Eggman for President") Transliteration: "Hikari o warera ni!" (Japanese: 光をわれらに！)	Mamoru Enomoto	Hiro Masaki	Kiyoshi Egami	January 11, 2004 (2004-01-11)	January 22, 2005
Citizens' criticism of Sonic grows as he begins to interfere with Eggman's sunlight supply service. Chris, unable to defend him confidently, goes to stop Sonic, but learns that sunlight has actually been blocked due to Eggman's ambitions.
42	16	"Amy's Love Went Away?!" ("A Date to Forget") Transliteration: "Emī ai no tōhikō!?" (Japanese: エミー愛の逃避行！？)	Shigeru Yazaki	Kiyoko Yoshimura	Seiji Okuda	January 18, 2004 (2004-01-18)	January 29, 2005
Amy is supposed to have a date with Sonic, but he never shows up. Angry, she decides to go for a drive with Sam Speed, who happens to be there. There, however, she encounters one of Eggman's robots. A Date To Forget (a.k.a. Amy's Love Went Away) is a prequel to Sonic Battle.
43	17	"Huge Home Electronics Panic!!" ("Mean Machines") Transliteration: "Kaden daipanikku!!" (Japanese: 家電大パニック！！)	Jōhei Matsuura	Hiro Masaki	Jōhei Matsuura	January 25, 2004 (2004-01-25)	February 5, 2005
While Eggman and his henchmen in prison are forced to work at an electronics factory, they plant mysterious chips in many of the products. The result is that home appliances all over the city now move on their own and attack people, causing mayhem.
44	18	"The Ridiculously Epic Spy Operation" ("Sewer Search") Transliteration: "Okashi na okashi na supai daisakusen" (Japanese: おかしなおかしなスパイ大作戦)	Nana Harada	Yoshio Urasawa	Toshiki Hirano	February 1, 2004 (2004-02-01)	February 12, 2005
Stewart has begun a search to catch Eggman, who has escaped from prison. However, Chris and his friends find him and decide to search together.
45	19	"Sonic Battle - Face Off!" ("Prize Fights") Transliteration: "Sonikku Batoru kaisai!!" (Japanese: ソニックバトル・開催！！)	Kenichi Maejima	Hiro Masaki & Chinatsu Hōjō	Masanori Mizuhara	February 8, 2004 (2004-02-08)	February 19, 2005
As part of the project to capture Eggman, the President proposes a martial arts tournament with a Chaos Emerald at stake. Sonic, Knuckles, Chris, and even Emerl are to participate.
46	20	"Sonic Battle - Finals!!" ("A Wild Win") Transliteration: "Sonikku Batoru kesshō!!" (Japanese: ソニックバトル・決勝！！)	Kazuyoshi Yokota	Hiro Masaki & Chinatsu Hōjō	Kazuhito Kikuchi	February 15, 2004 (2004-02-15)	February 26, 2005
It is time for the finals. However, Emerl, reacting to the Chaos Emerald, begins to run amok, and everyone challenges him to a battle to stop him. A Wild Win (a.k.a. Sonic Battle - Finale) is the last episode to use the plot of Sonic Battle.
47	21	"The Great Showdown at Latitude Zero!!" ("Map Of Mayhem") Transliteration: "Ido 0 daikessen!!" (Japanese: 緯度０大決戦！！)	Makoto Moriwaki	Masahiko Shiraishi	Makoto Moriwaki	February 22, 2004 (2004-02-22)	March 5, 2005
Eggman claims that he will use his giant battleship to stimulate the "belly button of the world," where submarine volcanic chains run through, and destroy the planet. Sonic and his friends try to stop him. The episode's Japanese title is very similar to the Japanese title of the 1969 sci-fi film Latitude Zero and there are several homages to the movie throughout the episode itself.
48	22	"Sonic vs. The Underground Monsters" ("The Volcanic Venture") Transliteration: "Sonikku tai chitei kaijū" (Japanese: ソニック対地底怪獣)	Mihiro Yamaguchi	Masahiko Shiraishi	Seiji Okuda	February 29, 2004 (2004-02-29)	March 12, 2005
Eggman escapes into the crater of a volcanic island in his Egg Giant-Makan. Sonic and his friends follow him through the crater to the underground world, where they encounter giant monsters. The episode's Japanese title is very similar to the Japanese title of the 1965 sci-fi kaiju film Frankenstein Conquers the World and there are several homages to the movie throughout the episode itself.
49	23	"The Day the World Stood Still" ("The Beginning of the End") Transliteration: "Sekai ga seishi suru hi" (Japanese: 世界が静止する日)	Mamoru Enomoto	Masahiko Shiraishi	Kiyoshi Egami	March 7, 2004 (2004-03-07)	March 12, 2005
According to the government, when Sonic and his friends are in the human world, a phenomenon called "Time Stagnation" begins to occur, and "time" becomes abnormal, causing the world to go crazy. The governors then propose to return Sonic to his own world, but Chris is reluctant. The episode's Japanese title is similar to the title of the 1951 sci-fi film The Day the Earth Stood Still.
50	24	"The Morning of Farewells" ("Running out of Time") Transliteration: "Wakare no asa" (Japanese: 別れの朝)	Masami Furukawa	Chinatsu Hōjō	Toshiki Hirano	March 14, 2004 (2004-03-14)	March 19, 2005
In order to return Sonic and his friends to their own world, Tails and Chuck rush to develop the device. At that time, GUN troopers suddenly begin attacking Dr. Eggman's base. This is not the President's intent.
51	25	"Chris' Long Journey" ("Friends 'till the End") Transliteration: "Kurisu no nagai tabi" (Japanese: クリスの長い旅)	Shigeharu Takahashi	Kiyoko Yoshimura	Masanori Mizuhara	March 21, 2004 (2004-03-21)	March 19, 2005
Just as Sonic is about to return to his world, Chris runs away with him. The two of them begin their escape.
52	26	"Memories of the Wind" ("A New Start") Transliteration: "Kaze no omoide" (Japanese: 風の思い出)	Hajime Kamegaki	Yoshio Urasawa	Hajime Kamegaki	March 28, 2004 (2004-03-28)	March 26, 2005
Sonic returns to his original world. Chris looks up at the moon as he reflects on his memories of him. The original TV broadcast uses insert songs "Natsu no Hi" and "Midori no Hibi" by OFF COURSE, while home video releases use "Hikaru Michi" and "Event: The Last Scene" from Sonic Adventure 2. This was intended to be the series finale before it was renewed for a third and final season.

Season 3: The Metarex Saga (2005)

No. overall	No. in season	Title	Directed by	Written by	Storyboarded by	Japanese air date	International air date(s)
53	1	"A Messenger From A Meteor Shower" ("A Cosmic Call") Transliteration: "Ryūseiu no shisha" (Japanese: 流星雨の使者)	Mitsutaka Noshitani	Kiyoko Yoshimura	Toshiki Hirano	March 25, 2020 (2020-03-25)	March 12, 2005 (France) September 10, 2005 (US)
A new powerful enemy called a "Metarex" has appeared on Sonic's planet. Sonic struggles against them and its leader, Dark Oak, and the seven Chaos Emeralds are scattered, and the Planet Egg, the source of life on the planet, is stolen. At that time, 18-year-old Chris comes to the Planet Egg, warping in a portal he has built himself. But for some reason, he is now 12 years old.
54	2	"The Spaceship: Blue Typhoon" ("Cosmic Crisis") Transliteration: "Uchūsen Burū Taifūn-gō" (Japanese: 宇宙船ブルータイフーン号)	Hideki Hiroshima	Kiyoko Yoshimura	Masanori Mizuhara	March 26, 2020 (2020-03-26)	March 12, 2005 (France) September 17, 2005 (US)
It seems that Cosmo has come to this planet in search of Sonic in order to recover the Planet Eggs of various planets from the Metarex. Hearing this, Sonic and his friends decide to leave for space. However, while the spaceship is under construction, a Metarex soldier attacks again. There, Sonic and his partners use the main cannon "Sonic Driver," which uses Sonic as a cannonball, to intercept Metarex Spike.
55	3	"The Water Planet, Hydo" ("H2 Whoa") Transliteration: "Mizu no wakusei Haidō" (Japanese: 水の惑星ハイドー)	Masami Furukawa	Hiro Masaki	Seiji Okuda	March 27, 2020 (2020-03-27)	March 13, 2005 (France) September 24, 2005 (US)
The Blue Typhoon, the spaceship on which Sonic and his friends boarded, arrives at Hydo, a planet that has become a water planet after being robbed of its Planet Egg. Chris and Sonic board the landing craft, but Sonic is kidnapped by the Metarex. Chris attempts to save Sonic somehow.
56	4	"Dr. Eggman Joins the War!" ("An Enemy In Need") Transliteration: "Dokutā Egguman sansen!" (Japanese: Dr.エッグマン参戦！)	Takuo Suzuki	Hiro Masaki	Masanori Mizuhara	March 31, 2020 (2020-03-31)	March 14, 2005 (France) October 1, 2005 (US)
While the people of Planet Hydo are thankful after the defeat of the Metarex, Eggman tries to trick Knuckles into getting the Chaos Emerald. Just then, a frog-shaped Metarex appears and swallows the Chaos Emerald!
57	5	"The Battle at the Ice Palace!" ("A Chilling Discovery") Transliteration: "Aisu paresu no tatakai!" (Japanese: アイスパレスの戦い！)	Kazunori Tanahashi	Masahiko Shiraishi	Seiji Okuda	April 1, 2020 (2020-04-01)	March 15, 2005 (France) October 8, 2005 (US)
After arriving at Breezer, a blizzard planet, Sonic and his friends search for the Chaos Emeralds and arrive at the "Ice Palace" where the Metarex soldiers are located. They are apparently doing some kind of research there.
58	6	"The Girls' Jungle Trap" ("Desperately Seeking Sonic") Transliteration: "Otome no janguru torappu" (Japanese: 乙女のジャングルトラップ)	Nana Harada	Kiyoko Yoshimura	Seiji Okuda	April 2, 2020 (2020-04-02)	March 16, 2005 (France) October 15, 2005 (US)
Sonic and his friends arrive at a certain jungle planet and defeat the Metarex's attack with Sonic Driver, but Sonic is sent somewhere with the force of the attack. Amy, Cream, and Cosmo are looking for Sonic, but then Metarex King Ape appears.
59	7	"The Chaotix Go To Outer Space" ("Galactic Gumshoes") Transliteration: "Kaotikusu, uchū e iku" (Japanese: カオティクス、宇宙へ行く)	Hideki Hiroshima	Yoshio Urasawa	Masanori Mizuhara	April 3, 2020 (2020-04-03)	March 17, 2005 (France) October 22, 2005 (US)
The Chaotix Detectives receive a request from Cream's mother. Various items have been sent from Chris' world via the portal from episode 53, and she wants them to be delivered to the Blue Typhoon. The Chaotix arrive by spaceship, but instead of being greeted by Chris and his friends, they are attacked!
60	8	"Shadow's Rebirth" ("Trick Sand") Transliteration: "Shadō ribāsu" (Japanese: シャドウ・リバース)	Masami Furukawa	Masahiko Shiraishi	Seiji Okuda	April 6, 2020 (2020-04-06)	March 18, 2005 (France) October 29, 2005 (US)
The Blue Typhoon arrives at Hobidon, already a dead planet. There they find the wreckage and ruins of a colony, and Sonic and his friends go to the ruins in search of the Chaos Emeralds. But the ruins are the transformable Metarex Deserd itself. Sonic is in desperate straits. Then, to his surprise, Shadow appears.
61	9	"The Metarex Battleship Attacks!" ("Ship of Doom") Transliteration: "Metarekkusu senkan shūrai!" (Japanese: メタレックス戦艦襲来！)	Takuo Suzuki	Hiro Masaki	Masanori Mizuhara	April 7, 2020 (2020-04-07)	March 19, 2005 (France) November 5, 2005 (US)
Metarex Hellship, which once attacked Cosmo's immigrant ship, attacks the Crimson Egg. Its next target is the Blue Typhoon, on which Sonic and his friends ride. Sonic and his friends are forced to fight against this threat that has put even Shadow in a tight spot.
62	10	"The Secret of the Underground Canyon" ("An Underground Odyssey") Transliteration: "Chika keikoku no himitsu" (Japanese: 地下渓谷の秘密)	Mitsutaka Noshitani	Kiyoko Yoshimura	Toshihiko Masuda	April 8, 2020 (2020-04-08)	March 20, 2005 (France) November 12, 2005 (US)
Tails and Cosmo, who had been separated from Sonic and his friends on the planet Alabasta, find a facility in a cave. There, copies of the Chaos Emeralds are being made by Metarex. Tails and Cosmo attempt to escape from the pursuit of Metarex Viper.
63	11	"The Space Fortress, Metal Plant" ("Station Break-In") Transliteration: "Uchū yōsai Metaru Puranto" (Japanese: 宇宙要塞メタルプラント)	Nana Harada	Hiro Masaki	Toshiki Hirano	April 9, 2020 (2020-04-09)	March 21, 2005 (France) November 19, 2005 (US)
The two remaining Chaos Emeralds (Blue and Green) are inside the Metarex's fortress. When Sonic and Eggman learn of this, they team up with each other and attempt to break into the fortress. Then, they discover the two Chaos Emeralds and a Planet Egg.
64	12	"Clash! Sonic vs. Shadow" ("A Metarex Melée") Transliteration: "Gekitotsu! Sonikku vs Shadō" (Japanese: 激突！ソニックｖｓシャドウ)	Hideki Hiroshima	Kiyoko Yoshimura	Seiji Okuda	April 10, 2020 (2020-04-10)	March 23, 2005 (France) November 26, 2005 (US)
Waiting for Sonic and his friends are soldiers of a Metarex army led by Dark Oak. Sonic and his friends are surrounded by the Metarex army around the fortress. It was all a trap. Sonic tries to escape, but he is confronted by Shadow over the Chaos Emeralds.
65	13	"The Chaotix's Electric Shock Love Plan" ("Mission: Match Up") Transliteration: "Kaotikusu dengeki raburabu daisakusen" (Japanese: カオティクス電撃ラブラブ大作戦)	Masami Furukawa	Masahiko Shiraishi	Masanori Mizuhara	April 13, 2020 (2020-04-13)	April 5, 2005 (France) December 3, 2005 (US)
Rare visitors appear on the Blue Typhoon. They are the three members of the Chaotix Detectives. When Vector sees Tails and Cosmo chatting amiably, he is convinced that Tails is in love with Cosmo. In order to encourage Tails, who according to Vector is a late bloomer, Vector devises an unusual plan.
66	14	"Cross the Galactic Corridor!" ("Clash in the Cloister") Transliteration: "Ginga kairō o watare!" (Japanese: 銀河回廊をわたれ！)	Kazuo Nogami	Hiro Masaki	Seiji Okuda	April 14, 2020 (2020-04-14)	April 6, 2005 (France) February 4, 2006 (US)
At last, the Blue Typhoon enters the galactic corridor. The interior of the corridor is a mysterious tunnel-like space, and it is blocked by cosmic dust that has blown in like the roots of a plant, preventing progress. The Blue Typhoon, stuck in the corridor, is attacked by Yellow Zelkova, the most powerful of the four Metarex bosses.
67	15	"The Black Trap" ("Teasing Time"/"Testing Time") Transliteration: "Burakku torappu" (Japanese: ブラック・トラップ)	Hajime Kamegaki	Yoshio Urasawa	Hajime Kamegaki	April 15, 2020 (2020-04-15)	April 7, 2005 (France) February 11, 2006 (US)
There is a massive Chaos Emerald signature from an asteroid. The Blue Typhoon heads there and found an old factory. Inside is a Chaos Emerald production plant. Then Black Narcissus, one of the four Metarex bosses, appears.
68	16	"Above a Destroyed Planet" ("A Revolutionary Tale") Transliteration: "Kowareta hoshi no ue de" (Japanese: こわれた星の上で)	Mitsutaka Noshitani	Kiyoko Yoshimura	Toshiki Hirano	April 16, 2020 (2020-04-16)	April 8, 2005 (France) February 18, 2006 (US)
Molly, a young girl from the planet "Cascade," is fighting the Metarex to restore the planet. She becomes interested in Shadow, who is as strong as the legendary hero "Black Wind" himself. Shadow, Rouge and Molly then decide to follow the signature of a Chaos Emerald to the mining site of Cascade. This is the second and final episode where Sonic and his friends aren't present, the first being "The Adventures of Knuckles and Hawk", and the only episode of Season 3 without Cosmo.
69	17	"Please, Marmolim!" ("The Planet of Misfortune") Transliteration: "Onegai Marumorin!" (Japanese: お願いマルモリン！)	Hideki Hiroshima	Kiyoko Yoshimura	Seiji Okuda	April 17, 2020 (2020-04-17)	April 9, 2005 (France) February 25, 2006 (US)
The Blue Typhoon, with Chris aboard, encounters the three Marmolims, Momo, Lue, and Lylem, who have a Chaos Emerald. Sonic and his team are then forced to return their ship to their home planet in exchange for the Chaos Emerald.
70	18	"The Eggman Fleet Appears!" ("Terror on the Typhoon") Transliteration: "Egguman kantai arawaru!" (Japanese: エッグマン艦隊現る！)	Masami Furukawa	Masahiko Shiraishi	Masanori Mizuhara	April 20, 2020 (2020-04-20)	April 10, 2005 (France) March 4, 2006 (US)
Sonic rescues a mysterious spaceship being chased by the Metarex, but the pilot of the spaceship is Decoe. At that moment, the Metarex's fleet warps out. To everyone's surprise, the Metarex and Eggman have teamed up.
71	19	"Café Chaotix" ("Hedgehog Hunt") Transliteration: "Kafe Kaotikusu" (Japanese: カフェ・カオティクス)	Takuo Suzuki	Hiro Masaki	Seiji Okuda	April 21, 2020 (2020-04-21)	April 11, 2005 (France) March 11, 2006 (US)
The Chaotix Detectives run a café on a planet in the Metarex space. Today, a new customer visits the café. This time, however, it is Eggman, who has just been appointed as part of the four Metarex bosses.
72	20	"The True Form of the Metarex?!" ("Zelkova Strikes Back") Transliteration: "Metarekkusu no shōtai!?" (Japanese: メタレックスの正体！？)	Mitsutaka Noshitani	Kiyoko Yoshimura	Seiji Okuda	April 22, 2020 (2020-04-22)	April 12, 2005 (France) March 18, 2006 (US)
Chased by the Metarex, the Blue Typhoon crash-lands on the planet Thunderbolt after a surprise attack by Yellow Zelkova. Yellow Zelkova is impervious to all attacks. In the fierce battle, Chris and Sonic are sent flying far away.
73	21	"Shadow, the Assassin!" ("The Cosmo Conspiracy") Transliteration: "Ansatsusha Shadō!" (Japanese: 暗殺者シャドウ！)	Nana Harada	Masahiko Shiraishi	Nana Harada	April 23, 2020 (2020-04-23)	April 13, 2005 (France) April 1, 2006 (US)
There is an intruder on the Blue Typhoon. It is Shadow, who is after Cosmo's life. Tails desperately escapes with Cosmo, but Shadow hunts them down, which means Cosmo is in danger.
74	22	"The Lost Planet" ("Eye Spy") Transliteration: "Rosuto puranetto" (Japanese: ロスト・プラネット)	Hideki Hiroshima	Kiyoko Yoshimura	Masanori Mizuhara	April 24, 2020 (2020-04-24)	April 14, 2005 (France) April 8, 2006 (US)
Sonic and his friends learn that Cosmo has been used by Dark Oak as a "living spy tool" that transmits what she sees and hears. Sonic and his friends are shocked, but when Cosmo tries to leave, they hold her back and vow to fight with her.
75	23	"The Day of the Forestations" ("Agent of Mischief") Transliteration: "Shinka no hi" (Japanese: 森化の日)	Masami Furukawa	Masahiko Shiraishi	Seiji Okuda	April 27, 2020 (2020-04-27)	April 15, 2005 (France) April 15, 2006 (US)
The Blue Typhoon takes off from the planet Green Gate and heads for coordinates 000 000. There is the planet Aquarius, which requires Chaos Emeralds and a giant Planet Egg. The final battle with the Metarex armada is about to begin.
76	24	"Decisive Battle! Dark Oak" ("The Light in the Darkness") Transliteration: "Kessen! Dāku Ōku" (Japanese: 決戦！ダーク・オーク)	Yutaka Saitō	Kiyoko Yoshimura	Seiji Okuda	April 28, 2020 (2020-04-28)	April 16, 2005 (France) April 22, 2006 (US)
Chris and his team bet on the Master Emerald for a comeback. They are going to use the Sonic Driver mechanism to strike the Master Emerald's energy into the Chaos Emeralds. Shadow and the Chaotix join in on the task, pushing back the Final Mova's attack with all their might. In the midst of the battle, Eggman tells Chris a shocking revelation.
77	25	"What I Can Do For You" ("A Fearless Friend") Transliteration: "Kimi no tame ni dekiru koto" (Japanese: 君のためにできること)	Mitsutaka Noshitani	Kiyoko Yoshimura	Masanori Mizuhara	April 29, 2020 (2020-04-29)	April 17, 2005 (France) April 29, 2006 (US)
The Final Mova becomes a giant nut. As if in answer to Cosmo's prayer, the Chaos Emeralds once again revive their power, and the golden Super Sonic and Super Shadow stand side by side. The onslaught of the two brake through the nut's outer contour, finally causing it to explode into pieces, but it is not the end.
78	26	"Where Planets Are Born" ("So Long Sonic") Transliteration: "Hoshi no umareru tokoro" (Japanese: 星の生まれるところ)	Hajime Kamegaki	Kiyoko Yoshimura	Hajime Kamegaki	April 30, 2020 (2020-04-30)	April 18, 2005 (France) May 6, 2006 (US)
The battle is over. Chris, who has given up on returning to Earth because there is no hope of restoring the Master Emerald, receives an envelope from Eggman. Inside is a ticket labeled "one-way ticket to Earth." This is the series finale.

Theme songs

Japan

• Opening

1. "Sonic Drive"
   • April 6, 2003 – March 28, 2004 and March 25, 2020 – April 30, 2020
   • Lyricist: Takeshi Aida
   • Composer / Arranger: Cher Watanabe
   • Singers: Hironobu Kageyama and Hideaki Takatori
   • Episode Range: 1–78

• Endings

1. "Fu-tu-re" (ミ・ラ・イ, Mi-ra-i)
   • April 6, 2003 – June 29, 2003
   • Lyricist / Composer / Arranger: Kazuyoshi Baba
   • Singers: Run&Gun
   • Episode Range: 1–13
2. "Shining Road" (光る道, Hikaru michi)
   • July 6, 2003 – December 28, 2003 and March 25, 2020 – April 30, 2020
   • Lyricist: Shun Taguchi
   • Composer / Arranger: Masataka Matsutoya
   • Singer: Aya Hiroshige
   • Episode Range: 14–39 and 53–78
3. " T.O.P."
   • January 4, 2004 – March 28, 2004
   • Lyricists / Singers: KP
   • Composer / Arranger: URU
   • Episode Range: 40–52

United States

Opening

1. "Gotta Go Fast"
   • August 23, 2003 – May 6, 2006
   • By Norman Grossfeld and Russell Velazquez
   • Episode Range: 1–78

Ending

1. "Gotta Go Fast" (shortened version)
   • August 23, 2003 – May 6, 2006
   • By Norman Grossfeld and Russell Velazquez

PAL regions

Opening

1. • "Sonic X"

• August 23, 2003 – May 6, 2006
• By Marc Biagi and Nikki Gregoroff
• Episode Range: 1–78

Ending

• PAL region broadcasts use the same melody of the American ending theme, with the pitch sometimes adjusted.

South Korea

South Korea has the same melody of the Japanese opening theme and the first ending theme, with the lyrics translated into Korean.

Italy

"Sonic" (Episodes 1–78)

France

The French dubbing has the same melody of the Japanese opening theme, but it is adapted into French lyrics instead. Endings are instrumental.

Home video releases

Japan

A total of 13 DVD and VHS volume compilations was released by Victor Entertainment and Universal Music. "Hi-Spec" editions of volumes 1-10 have also been released, which include bonus features and 5.1 audio.

VHS/DVD Name	Episodes	Release Date
ソニックX Vol.1	1–5	July 23, 2003
ソニックX Vol.2	6–9	August 21, 2003
ソニックX Vol.3	10–13	September 26, 2003
ソニックX Vol.4	14–17	October 22, 2003
ソニックX Vol.5	18–21	November 21, 2003
ソニックX Vol.6	22–25	December 17, 2003
ソニックX Vol.7	26–29	January 21, 2004
ソニックX Vol.8	30–33	February 21, 2004
ソニックX Vol.9	34–36	March 24, 2004
ソニックX Vol.10	37–39	April 21, 2004
ソニックX Vol.11	40–43	May 21, 2004
ソニックX Vol.12	44–47	June 23, 2004
ソニックX Vol.13	48–52	July 21, 2004

United States

DVD

Funimation released episodes 1–52 in 10 single-disc releases:

DVD Name	Episodes	Release Date
Sonic X: Vol. 1: A Super Sonic Hero	1. "Chaos Control Freaks" 2. "Sonic to the Rescue" 3. "Missile Wrist Rampage" 27. "Pure Chaos"	June 1, 2004
Sonic X: Vol. 2: The Chaos Factor	4. "Chaos Emerald Chaos" 5. "Cracking Knuckles" 6. "Techno-Teacher" 7. "Party Hardly"	June 1, 2004
Sonic X: Vol. 3: Satellite Swindle	8. "Satellite Swindle" 9. "The Last Resort" 10. "Unfair Ball" 11. "Fly Spy"	October 12, 2004
Sonic X: Vol. 4: Beating Eggman	12. "Beating Eggman (Part 1)" 13. "Beating Eggman (Part 2)" 14. "That's What Friends are For" 15. "Skirmish in the Sky" 16. "Depths of Danger"	December 7, 2004
Sonic X: Vol. 5: Sonic's Scream Test	17. "The Adventures of Knuckles and Hawk" 18. "The Dam Scam" 19. "Sonic's Scream Test" 20. "Cruise Blues" 21. "Fast Friends"	January 25, 2005
Sonic X: Vol. 6: Countdown to Chaos	22. "Little Chaos Lost" 23. "Emerald Anniversary" 24. "How to Catch a Hedgehog" 25. "A Dastardly Deed" 26. "Countdown to Chaos"	April 12, 2005
Sonic X: Vol. 7: Revenge of the Robot	28. "A Chaotic Day" 29. "A Robot Rebels" 30. "Heads Up, Tails!" 31. "Revenge of the Robot" 32. "Flood Fight"	June 14, 2005
Sonic X: Vol. 8: Project Shadow	33. "Project: Shadow" 34. "Shadow Knows" 35. "Sonic's Big Break" 36. "Shadow World" 37. "Robotnik's Revenge" 38. "Showdown in Space"	November 15, 2005
Sonic X: Vol. 9: Into the Darkness	39. "Defective Detectives" 40. "Sunblock Solution" 41. "Eggman for President" 42. "A Date to Forget" 43. "Mean Machines" 44. "Sewer Search"	February 7, 2006
Sonic X: Vol. 10: The Beginning of the End	45. "Prize Fight" 46. "A Wild Win" 47. "Map of Mayhem" 48. "The Volcanic Venture" 49. "The Beginning of the End" 50. "Running out of Time" 51. "Friends 'Till the End" 52. "A New Start"	May 16, 2006

The episodes were re-released in "Saga" sets:

DVD Name	Episodes	Release Date
Sonic X: New World Saga	1. "Chaos Control Freaks" 2. "Sonic to the Rescue" 3. "Missile Wrist Rampage" 4. "Chaos Emerald Chaos" 5. "Cracking Knuckles" 6. "Techno-Teacher" 7. "Party Hardly" 8. "Satellite Swindle" 9. "The Last Resort" 10. "Unfair Ball" 11. "Fly Spy" 12. "Beating Eggman (Part 1)" 13. "Beating Eggman (Part 2)"	November 13, 2007
Sonic X: Chaos Emerald Chaos	14. "That's What Friends are For" 15. "Skirmish in the Sky" 16. "Depths of Danger" 17. "The Adventures of Knuckles and Hawk" 18. "The Dam Scam" 19. "Sonic's Scream Test" 20. "Cruise Blues" 21. "Fast Friends" 22. "Little Chaos Lost" 23. "Emerald Anniversary" 24. "How to Catch a Hedgehog" 25. "A Dastardly Deed" 26. "Countdown to Chaos"	May 20, 2008
Sonic X: Chaos & Shadow Sagas	27. "Pure Chaos" 28. "A Chaotic Day" 29. "A Robot Rebels" 30. "Heads Up, Tails!" 31. "Revenge of the Robot" 32. "Flood Fight" 33. "Project: Shadow" 34. "Shadow Knows" 35. "Sonic's Big Break" 36. "Shadow World" 37. "Robotnik's Revenge" 38. "Showdown in Space"	September 9, 2008 September 23, 2008
Sonic X: The Egg Moon, Emerl & Homebound Sagas	39. "Defective Detectives" 40. "Sunblock Solution" 41. "Eggman for President" 42. "A Date to Forget" 43. "Mean Machines" 44. "Sewer Search" 45. "Prize Fight" 46. "A Wild Win" 47. "Map of Mayhem" 48. "The Volcanic Venture" 49. "The Beginning of the End" 50. "Running out of Time" 51. "Friends 'Till the End" 52. "A New Start"	September 22, 2009

Episodes 53–78 made their way to the U.S. in two 13-episode box sets:

DVD Name	Episodes	Release Date
Sonic X: The Complete 5th Season	53. "A Cosmic Call" 54. "Cosmic Crisis" 55. "H2 Whoa" 56. "An Enemy in Need" 57. "A Chilling Discovery" 58. "Desperately Seeking Sonic" 59. "Galactic Gumshoes" 60. "Trick Sand" 61. "Ship of Doom" 62. "An Underground Odyssey" 63. "Station Break-In" 64. "A Metarex Melee" 65. "Mission: Match-Up"	September 12, 2006 October 31, 2006
Sonic X: So Long, Sonic	66. "Clash in the Cloister" 67. "Teasing Time/Testing Time" 68. "A Revolutionary Tale" 69. "The Planet of Misfortune" 70. "Terror on the Typhoon" 71. "Hedgehog Hunt" 72. "Zelkova Strikes Back" 73. "The Cosmo Conspiracy" 74. "Eye Spy" 75. "Agent of Mischief" 76. "The Light in the Darkness" 77. "A Fearless Friend" 78. "So Long Sonic"	February 13, 2007

DVD Name	Episodes	Release Date
Sonic X: Collection 1	1–52	November 4, 2016
Sonic X: Collection 2	53–78	December 6, 2016

Blu-ray

Blu-ray Name	Episodes	Release Date
Sonic X: The Complete Series English Dub	1–78	May 28, 2019
Sonic X: The Complete Series Japanese Sub	1–78	April 25, 2023

United Kingdom

UK DVD

Warner Home Video and Jetix Consumer Products released only 4 volumes with episodes from 1 to 8.

• Volume 1 – Episode 1–2 ("Chaos Control Freaks" and "Sonic to the Rescue")
• Volume 2 – Episode 3–4 ("Missile Wrist Rampage" and "Chaos Emerald Chaos")
• Volume 3 – Episode 5–6 ("Cracking Knuckles" and "Techno-Teacher")
• Volume 4 – Episode 7–8 ("Party Hardly" and "Satellite Swindle")

Australia

In Australia, 17 volumes of the first series were released by MRA Entertainment in 2005–2006, which featured three episodes per disc.