Sonic Underground

The show takes place in a canon and continuity separate from any other Sonic the Hedgehog media. Queen Aleena, the ruler of Mobius, is overthrown by Dr. Robotnik, who seizes control of the planet with his army of Swat-bots and forces Queen Aleena into hiding. To preserve the dynasty, Queen Aleena separates her three children: Sonic, Sonia, and Manic after the Oracle of Delphius tells her of a prophecy proclaiming she would one day reunite with her children to form the "Council of Four" and overthrow Robotnik. Meanwhile, Dr. Robotnik establishes an autocratic government by appointing bounty hunters Sleet and Dingo to do his dirty work, legally turning anyone who stands against him into robots devoid of free will, and forcing the nobles into paying large amounts of money to him as tribute.

When Sonic, Sonia, and Manic grow up, the Oracle of Delphius reveals the prophecy to them. After that, Sonic, Sonia, and Manic go on a quest searching for Queen Aleena throughout Mobius. Dr. Robotnik, with the assistance from Sleet, Dingo and the Swat-bots, tries constantly to capture the royal hedgehogs and prevent the prophecy from being fulfilled.

The Oracle of Delphius assigns the three siblings powerful medallions that can change into musical instruments, and can also be used as weapons: Sonic's medallion is an electric guitar; Sonia's medallion is a keyboard that functions as a smoke machine; and Manic's medallion is a drumset that can be used as an "earth controller" with cymbals that can deflect laserfire. All of the medallions can be used as laser guns. The three use the medallions not only to fight Robotnik's forces, but also as instruments for their underground rock band, "Sonic Underground".

• Sonic (speaking voice by Jaleel White and singing voice provided by Sam Vincent)^[4][5] is the eldest sibling and lead singer of many songs performed by the Sonic Underground. His medallion turns into a guitar, which can fire laser blasts. As fast as the speed of sound, Sonic can easily outrun danger. He is a big fan of chili dogs, causing him to be a bit overweight. He also is terrified of water as he cannot swim. Sonic wears anti-gravity sneakers that allow him to hover over the ground while running.
• Sonia (speaking voice by Jaleel White and singing voice provided by Stevie Vallance)^[5] is the only female hedgehog member of the Sonic Underground and the sister of Sonic and Manic. Unlike her brothers, she was raised by an aristocratic foster family, giving her an upper-class mentality. She hates getting dirty, is skilled at gymnastics and karate, and possesses superhuman strength, a photographic memory, and the ability to spin in a cyclonic manner. Her medallion turns into a keyboard, which can fire laser blasts from one end, or create a pink mist when the keys are played. Sonia has a pink motorcycle which can travel as fast as Sonic's running and Manic's hover board. She also is the one that does research on Robotnik's plans and provides the technological innovation for the Sonic Underground. Of the siblings, Sonia is the only one to be seen involved in any romance, displaying feelings for her childhood friend Bartleby, despite his snobbishness, as well as other men encountered in her travels. Among these is Knuckles, whom she develops an attraction to during the series' Flying Fortress saga.
• Manic (speaking voice by Jaleel White and singing voice provided by Tyley Ross)^[5] is the youngest sibling. He is a calculating and sarcastic hedgehog that was raised by thieves, and is a master of their trade. When Manic met his siblings, they disapproved of his thieving tendencies, but his skills as a lock-pick were greatly appreciated. Manic possesses neither Sonic's speed nor Sonia's spin-attack, thus making him the only member of the Sonic Underground who relies entirely on his medallion for superpowers of his own. Despite his lack of superpowers, his thieving skills proves himself extremely useful to the group from time to time. Manic is the drummer of the Sonic Underground. His medallion turns into drums, which can cause earthquakes; the Oracle of Delphius claims that his drums are the most powerful instruments of the three. He also has a hover board that is as fast as Sonic's running and Sonia's motorcycle. His medallion's string is blue.
• Dr. Robotnik (voiced by Garry Chalk)^[5] is the evil human dictator of Mobius, renamed Robotropolis under his rule, having conquered it with his army of Swatbots. He captures and roboticizes anyone who opposes him, transforming them into robotic servants.
  • Sleet (voiced by Maurice LaMarche)^[5] is a wolf and one of Robotnik's canine bounty hunters. This cunning wolf leads the bumbling Dingo about on missions to capture the hedgehogs. Sleet has a morphing device that can transform Dingo into anything he wishes. He is constantly being crushed by Dingo and is usually the one who suffers the most from their combined failures.
  • Dingo (voiced by Maurice LaMarche)^[5] is a dingo who is one of Robotnik's canine bounty hunters and Sleet's partner. Dingo is a huge, muscle-bound blonde dingo and is also very ignorant. He is partially roboticized in his hands and his left leg from the knee down, which is never explained. He has a relentless crush on Sonia, but remains fiercely loyal to Sleet.
  • Swatbots (voiced by Maurice LaMarche)^[5] are the robotic foot soldiers of Dr. Robotnik.

• Queen Aleena Hedgehog (voiced by Gail Webster)^[5] is the mother of the Sonic Underground group and former ruler of Mobius before Robotnik's takeover. She had to give them up in order for the prophecy to become true. She spends the series on the run from her own children, until the time is right to reveal herself. Her character has many allies, including the Oracle of Delphius and Knuckles. She also does a bit of narrating in the start of every episode.
• Knuckles (voiced by Brian Drummond)^[5] is a red echidna who is the guardian of one of the Chaos Emeralds and Angel Island, and an acquaintance of Queen Aleena's. He is very protective of his island home, and has set many traps about the island. He has a pet dinosaur called Chomps, and like his game incarnation is shown to be somewhat gullible. His great-grandfather Athair warns him that he must stay on the island in order to play his part in the freedom of Mobius. He turned against the Hedgehogs twice - first being tricked into thinking they were thieves and later thinking that it was the only way to save their planet - but came around and worked with them against the threat of Robotnik and his henchmen. During the Flying Fortress arc, he showed signs of a growing affection for Sonia, including a particular guilt over the prospect of betraying her.
• The Freedom Fighters are allies of Sonic, Sonia, and Manic. They assist in fighting the forces of Dr. Robotnik.
  • Oracle of Delphius (voiced by Maurice LaMarche)^[5] is an odd, wart-covered creature in a cloak that resembles a scaly anteater/crocodile hybrid. The Oracle prophesied that when Robotnik invaded Mobius, Aleena and her children would form the Council of Four to overthrow Robotnik and free Mobius. The Oracle lives in a cave somewhere in a cold region of Mobius, and is quite good at making chili dogs. He is named after the Oracle at Delphi.
  • Sir Bartleby Montclair (voiced by Peter Wilds) is a posh, cowardly upper-class English-accented mink who is one of Robotropolis' richest aristocrats. Bartleby is Sonia's ex-fiancé. He dislikes Dr. Robotnik and is often forced to fund Robotnik's schemes – although in secret he still supports Queen Aleena.
  • Cyrus (voiced by Ian James Corlett)^[5] is a lion and a technician for the Freedom Fighters. He is an old friend of Sonic. In his first appearance he was working as a spy for Robotnik, but quit upon discovering that the Freedom Fighters' Sanctuary was a hideout for their children. Cyrus's father was roboticized.
  • Trevor (voiced by Matt Hill) is a mouse who is a friend of the royal siblings and Cyrus. He dresses like a hippie. Trevor is an ace pilot and helps build and fix mechanical equipment.
  • Renée is a fox and computer expert who leads a branch of the Freedom Fighters in the resort town of Anays.
• Athair (voiced by Maurice LaMarche impersonating Sean Connery) is the great-grandfather of Knuckles. While he advises Knuckles not to leave Angel Island, he does provide advice to his great-grandson.

• Jaleel White^[8] - Sonic, Sonia, Manic, Aman-Rapi
• Garry Chalk^[8] - Dr. Robotnik
• Brian Drummond^[8] - Knuckles
• Maurice LaMarche^[8] - Sleet, Dingo, Swatbots, Oracle of Delphius, Athair, Chuck, Farrell
• Tyley Ross^[8] - Manic (singing voice)
• Stevie Vallance^[8] - Sonia (singing voice)
• Sam Vincent^[8] - Sonic (singing voice)
• Gail Webster^[8] - Queen Aleena Hedgehog
• Peter Wilds^[8] - Sir Bartleby Montclair

• Kathleen Barr^[8] - DooBot
• Ian James Corlett^[8] - Cyrus
• Merilyn Gann^[8] - Mayor Whinnyham
• Phil Hayes^[8] - Gondor
• Matt Hill^[8] - Max
• Adrian Hughes^[8] - Argus
• Terry Klassen^[8] - Bat
• Blu Mankuma^[8] - Fodder
• Cusse Mankuma^[8] - Mantu
• Tabitha St. Germain^[8] - Lydia
• Lee Tockar^[8] - Trevor

• Michel Trouillet - Voice Director

It is often claimed that the newly Sega of America CEO Shoichiro Irimajiri contacted DIC CEO Andy Heyward to make a new Sonic cartoon, which would help gain interest in buying their new console, the Dreamcast.^{[citation needed]} Sonic Underground started production in early 1997, around the same time the development of both the Dreamcast and Sonic Adventure had started. The show bible was written as early as March 1997.^[9][10] The show was publicly announced as early as December 1997.^[11][12][13]

When the show was in development, two episodes per week were produced, and the writers felt that they were not given enough time to "tie everything together" in the plot, being limited to a three-part "Origins" saga for coherency. DIC used cattle calls to generate episode plots. Periodically, about twenty unaffiliated writers were brought into the studios to learn about the established characters and brainstorm possible plots for episodes, after which about one or two would be selected.^[14] According to Mike Piccirillo, when he was writing songs for the show, there were no storyboards done yet, so he could only work off of the scripts, which often said what moral or lesson the song should be about in each episode.^[15][16] The show's animation was outsourced to the Taiwanese animation studio Hong Ying Animation with the storyboards and main title animation done in Madrid, Spain by Milimetros, S.A. (also responsible for the animation in the Saturday morning Sonic the Hedgehog cartoon and some of the storyboards in Adventures of Sonic the Hedgehog), pre-production services provided by Le Studio Ellipse, layout services by Arles Animation and video and audio post-production services by Les Studios de Saint-Ouen. According to Robby London, Sega of Japan had an active role in the approval process for Sonic Underground, going so far as to force DiC to reanimate the characters with five fingers instead of the usual four due to the Japanese association of four fingers with the yakuza.^[17][18]

While it was once believed that 65 episodes were made of which only 40 aired, Ben Hurst, a main writer from Sonic the Hedgehog (dubbed SatAM by fans), who was also involved in Sonic Underground's production, stated in a chat at the Sonic Amateur Games Expo 2008^[19] that only 40 were planned to be produced from the beginning.^[20]

Sonic Underground first premiered in France on 6 January 1999 and aired on TF1 on the TF! Jeunesse block on Wednesdays and Sundays.^[21][22][23]

The show made its English premiere in the United Kingdom on 2 May 1999, airing on ITV's GMTV strand, on the Disney-produced block Diggit, which was programmed by the show's distributor Buena Vista International Television and had also aired other programmes produced by DIC Entertainment at the time.^[24] ITV aired the first 18 episodes of the series on Sunday mornings before the series was removed from the Diggit schedule.^[25]

In 2005, DIC pre-sold the series to GMTV,^[26] and so the series reran on ITV2 in 2005 as part of the GMTV2 Kids strand.

By 2006, alongside the other Sonic cartoons, the series began to air on Pop, and by 2012, was airing on its sister channel Kix!^[27]

In February 1998, it was announced that Bohbot Entertainment had acquired the North American broadcast rights to the series to air on their BKN syndicated strand.^[28] More information was revealed in January 1999.^[29] The series premiered in the country on 30 August 1999 as one of two "new" shows added to the newly-launched BKN Kids II block, where the series aired on weekday mornings at 6:00 AM Central Time,^[30][31] and ran until 22 October 1999.

The series also aired on the Sci-Fi Channel which BKN also had a broadcast deal with at the time, however, the episodes that were supposed to air on Fridays were skipped because Double Dragon and later King Arthur and the Knights of Justice were airing instead, therefore only 32 of the 40 Sonic Underground episodes aired on that channel.^[32][33][34]

In 2004, the show returned to syndicated television stations on weekends as part of the DIC Kids Network E/I strand. It, alongside fellow DIC series Mummies Alive! were the only two programs on the strand to not fulfill E/I requirements.^[35]

On 19 January 2006, CBS announced a multi-year deal with DIC to broadcast some of their shows on the "CBS's Secret Saturday Morning Slumber Party" segment, including Sonic Underground,^[36] however, the block would not end up running the show in the end.

In 2009, reruns of Sonic Underground aired on Firestone Communications' Sorpresa, a Hispanic children's station (Channel 850 on Time Warner Cable) in the United States, broadcasting the audio-dubbed Latin Spanish dub.

Re-runs of the series aired on Disney XD starting 11 June 2012 and ending on 14 December 2012.^[37] This marked the second time a Sonic the Hedgehog cartoon has aired on a Disney-themed channel, with the first being Adventures of Sonic the Hedgehog on Toon Disney (the predecessor of Disney XD) from 1998 to 2002.

The series aired in Canada on Teletoon.

In Australia, Sonic Underground premiered on The Seven Network during The Big Breakfast in 1999.

The show was broadcast by KidsCo in regions the channel broadcast from.^[38]

In Poland the show aired on TV Puls 2 as a part of the Junior TV block.

In the United States, Sterling Entertainment released a VHS/DVD titled "Dr. Robotnik's Revenge" in July 2003, containing three episodes, and a bonus Super Mario Bros. episode on the DVD release. It was re-released by NCircle Entertainment in March 2007 without the bonus Mario episode. The Sterling versions of the Adventures of Super Mario Bros. 3 "King Koopa Katastrophe" and The Legend of Zelda "Ganon's Evil Tower" DVDs also included 1 and 2 episodes respectively as DVD bonuses which the NCircle reissues of both releases excluded. Sterling Entertainment's VHS/DVD release of Sonic Christmas Blast also included 3 episodes (2 on the VHS).

Shout! Factory and Vivendi Entertainment have released the complete series on DVD in Region 1 (NTSC) in two volume sets. Volume 1, simply entitled Sonic Underground, was released on 18 December 2007.^[39] It contains the first 20 episodes of the show on three discs, with disc three also including interviews with DIC's Robby London, Mike Piccirillo, an opening title animatic, and concept art. A bonus fourth disc is an audio CD containing eight songs from the series, including the opening theme. Sonic Underground: Volume 2 was released on 17 June 2008, featuring the remaining 20 episodes and another bonus audio CD featuring eight more songs from the series.

From 2007 until 2010, NCircle Entertainment released several single-release DVDs containing four episodes each:

NCircle also re-released Volumes 1 and 2 in 2013 and 2017, respectively.^[40][41] On 25 July 2023, they released the complete series as a four-disc set.^[42]

In 2004, Anchor Bay UK obtained rights to distribute several DIC cartoons, including Sonic Underground on home video. The first two volumes were released on 31 May 2004^[43][44] while the next two were released on 16 August 2004.^[45][46] There were plans for the remaining six volumes to be released separately, but they were instead released in a 10-DVD boxset in October 2004.^[47][48]

In July 2005, Avenue Entertainment released two budget DVDs containing two episodes each.^{[citation needed]}

Delta Home Entertainment released the complete series again on DVD in June 2008 as a 4-disc set, with the fifth DVD containing the bonus features from the Shout! Factory DVD boxset.^[49] Delta Home Entertainment also released the four discs separately, with Disc 1 and 2 being released as "Beginnings" and "Who Do You Think You Are" in August 2008, and Discs 3 and 4 being released as "When in Rome" and "Country Crisis" in September 2008.^{[citation needed]}

Sonic Underground received mixed reviews: it was criticized for its complex plot and large amount of differences from the games, although some critics have defined the music as catchy.^[50][51][52] David Cornelius of DVD Talk said, "While many Sonic fans did not take too well to all the changes, preferring the original 'Sonic' cartoon to this stranger, sometimes darker, sometimes sillier incarnation, the series did win a small but loyal cult following. I fall more on the side of disappointment - for all the cleverness that went into crafting an all-new backstory, the episodes themselves are uninspired - but acknowledge the simple fact that it scores well with its target audience."^[53] GamesRadar called the show as one of "the absolute worst Sonic moments", criticizing the extra characters and the complex plot.^[50] Patrick Lee of The A.V. Club panned the series, calling it one of the most artistic failures to ever end up on television and "the result of several unrelated ideas forcibly squashed into one project".^[54] Comedian Chris Hardwick commented on the show's theme song, composed by Mike Piccirillo, claiming that "that guy sounds like he's trying to win his exwife back."^[55] Susan Arendt of Wired said "The songs are actually kind of catchy in a Saturday morning cartoon kind of way, but the band thing still seems a bit out of place, especially when the instruments turn into weapons."^[51] Emily Ashby of Common Sense Media said "Sonic Underground has some good things to offer kids, but only if they're ready for the complexities of its story" criticizing its complex plot but complimenting its low violence and ability to entertain children.^[56]

The Sonic the Hedgehog comic from Archie Comics featured a story in one of its special issues in which the Sonic Underground continuity was featured. According to the comics' plot, the reality in which Sonic Underground takes place is one of many parallel universes that share elements with Sonic's own. In the story, Sonic Prime—hailing from the main universe in the comic series—joins forces with his counterpart and siblings to stop Dr. Robotnik, who has managed to assemble a monstrous battle machine known as the Giant Borg. Robotnik obtained the pieces for this machine due to being mistaken for one of his own counterparts by Evil Sonic, an evil counterpart of Sonic's who later came to be known as Scourge the Hedgehog.^{[citation needed]}

The Sonic Universe spin-off comic was originally scheduled to feature an epilogue to the unfinished Sonic Underground for its 50th issue. However, for unknown reasons this was replaced with a story focusing on one of Sonic's long-running enemies, Metal Sonic. The Underground Epilogue was put on hold indefinitely, due to Sega not permitting the show be featured in the comics.^[57] However, in 2013, during the events of Sonic & Mega Man: Worlds Collide by Archie Comics, Sonic Prime's multiverse ceased to exist when Dr. Eggman launched the Super Genesis Wave in conjunction with Dr. Wily, causing the Prime Zone to be irreversibly rewritten and the multiverse to collapse in on itself, destroying most prior known realities, including the Sonic Underground reality, and wiping all the inhabitants there away from existence, including all the characters within Sonic Underground there as well. However, ideas for Epilogue created by Ian Flynn was used by fans, for creating their own Epilogue as part of Archie Sonic Online project^[58].