History Trivia / SonicUnderground

* TalkingToHimself: Jaleel White voices ''all three'' main characters.

** More episodes of this show were planned, but never went beyond the planning stages. Ian Flynn, head writer of ''ComicBook/ArchieComicsSonicTheHedgehog'', stated that he wanted to write a conclusion in comic form (helped by the fact that the cartoon was established to be in the comic series' {{Multiverse}} in an earlier story), but ExecutiveMeddling ultimately prevented this.

* FranchiseKiller: It was the last ''Sonic'' cartoon to be produced by Creator/DICEntertainment, as they lost the ''[[Franchise/SonicTheHedgehog Sonic]]'' TV rights not long after the show ended and left the West without a ''Sonic'' cartoon for 15 years (barring ''Anime/SonicX'', a Japanese production exported overseas by Creator/FourKidsEntertainment). When ''WesternAnimation/SonicBoom'' came around, it ended up being co-produced in-house by Sega of America. Sadly, [[https://comicbook.com/gaming/2019/10/16/sonic-mania-adventures-animated-shorts-yukio-kusumoto-interview/ not even that was enough]], and since that series got ScrewedByTheNetwork, all ''Sonic'' animation has been in short-form and made largely in-house.

* FranchiseKiller: It was the last ''Sonic'' cartoon to be produced by Creator/DICEntertainment, as they lost the ''[[Franchise/SonicTheHedgehog Sonic]]'' TV rights not long after the show ended and left the West without a ''Sonic'' cartoon for 15 years (barring ''Anime/SonicX'', which was produced in Japan but brought over by Creator/ForKids). When ''WesternAnimation/SonicBoom'' came around, it ended up being co-produced in-house by Sega of America. Sadly, [[https://comicbook.com/gaming/2019/10/16/sonic-mania-adventures-animated-shorts-yukio-kusumoto-interview/ not even that was enough]], and since that series got ScrewedByTheNetwork, all Sonic animation has been in short-form and made largely in-house.

* CreatorBacklash: Ben Hurst disliked the premise and had a bad time working with the material of other staff, as well as being pitched in favor of a ''WesternAnimation/SonicSatAM'' continuation.
* CrossDressingVoices: Creator/JaleelWhite voices Sonia using a modified [[Series/FamilyMatters Urkel voice]].
* FanNickname: Some people call an overpowered Emerald fused Dingo "Chaos Dingo".
* FranchiseKiller: It was the last ''Sonic'' cartoon to be produced by Creator/DICEntertainment, as they lost the ''[[Franchise/SonicTheHedgehog Sonic]]'' TV rights not long after the show ended and left the West without a ''Sonic'' cartoon for 15 years (barring ''Anime/SonicX'', which was produced in Japan but brought over by 4Kids). When ''WesternAnimation/SonicBoom'' came around, it ended up being co-produced in-house by Sega of America. Sadly, [[https://comicbook.com/gaming/2019/10/16/sonic-mania-adventures-animated-shorts-yukio-kusumoto-interview/ not even that was enough]], and since that series got ScrewedByTheNetwork, all Sonic animation has been in short-form and made largely in-house.

** The episode "Winner Fakes All" has the same plot as the ''WesternAnimation/SonicSatAM'' episode "Sonic Racer", and "Sonic Tonic" is a rehash of the ''WesternAnimation/AdventuresOfSonicTheHedgehog'' episode "Full-Tilt Tails".

** According to Ben Hurst, this series would have at one point been a continuation of ''WesternAnimation/SonicSatAM''. Instead, it was decided to retool the concept and make it into a separate series.

* CrossDressingVoices: Jaleel White voices Sonia using a modified [[Series/FamilyMatters Urkel voice]].

* RoleReprise: Jaleel White returns as the voice of Sonic and also voices Sonia and Manic. The only key difference is the hedgehogs' singing voices were provided by different voice actors.[[note]]Sonic's singing voice was provided Creator/SamuelVincent, Sonia's was provided by Stevie Vallance, and Manic's was provided by Tyley Ross.[[/note]]

* CultClassic: While the show didn’t really do that great in reviews or ratings, it does a small, but loyal fan following.

* FranchiseKiller: It was the last ''Sonic'' cartoon to be produced by Creator/DICEntertainment, as they lost the ''[[Franchise/SonicTheHedgehog Sonic]]'' TV rights not long after the show ended and left the West without a ''Sonic'' cartoon for 15 years (barring ''Anime/SonicX'', which was produced in Japan but brought over by 4Kids). When ''WesternAnimation/SonicBoom'' came around, it ended up being co-produced in-house by Sega of America. Sadly, not even that was enough, and since that series got ScrewedByTheNetwork, all Sonic animation has been in short-form and made largely in-house.

* FranchiseKiller: It was the last ''Sonic'' cartoon to be produced by Creator/DICEntertainment, as they lost the ''[[Franchise/SonicTheHedgehog Sonic]]'' TV rights not long after the show ended and left the West without a ''Sonic'' cartoon for 15 years (barring ''Anime/SonicX'', which was produced in Japan). When ''WesternAnimation/SonicBoom'' came around, it ended up being co-produced in-house by Sega of America.

* OutofOrder: The Origins and Chaos Emerald three-part episodes aired in between standalone episodes in the initial broadcast, with home video releases adding the former at the start of the series and the Chaos Emerald episodes in sequence.

* FranchiseKiller: It was the last ''Sonic'' cartoon to be produced by Creator/DICEntertainment, as they lost the ''Sonic'' TV rights not long after the show ended and left the West without a ''Sonic'' cartoon for 15 years (barring ''Anime/SonicX'', which was produced in Japan). When ''WesternAnimation/SonicBoom'' came around, it ended up being co-produced in-house by Sega of America.

* FranchiseKiller: It was the last ''Sonic'' cartoon to be produced by Creator/DICEntertainment, as they lost the ''Sonic'' TV rights not long after the show ended and left the West without a ''Sonic'' cartoon for 15 years (barring ''Anime/SonicX'', which was produced in Japan). When ''WesternAnimation/SonicBoom'' came around, it ended up being produced in-house by Sega of America.

* CreatorBacklash: Ben Hurst disliked the premise and had a bad time working with the material of other staff, as well as being pitched in favor of a ''WestesternAnimation/SonicSatAM'' continuation.

* CreatorBacklash: Ben Hurst expressed a contempt for writing for the series, disliking the premise and having a bad time working with the material of other staff. To add insult to injury, this was pitched in favor of continuing his previous beloved project, ''WesternAnimation/SonicSatAM''.
* CrossDressingVoices: Jaleel White as Sonia. Oddly though, if one watches an episode of ''Sonic Underground'', you can tell the voice Jaleel White uses when providing the voice of Sonia sounds inconspicuously identical to the high-pitched voice White used from his other (more) famous role as [[Series/FamilyMatters Steve Urkel]].

** Early concept art shows Queen Aleena (a.k.a Sonic's Mom) with a [[https://www.sonicstadium.org/2012/07/freak-out-friday-the-original-sonic-underground-concept/ different design]].
** According to Ben Hurst, this series would have at one point been a continuation of ''WesternAnimation/SonicSatAM''. Instead, it was decided to retool the concept completely and make it into a separate series, much to his chagrin.

* WhatCouldHaveBeen: More episodes of this show were planned, but never went beyond the planning stages. Ian Flynn, head writer of ''ComicBook/ArchieComicsSonicTheHedgehog'', stated that he wanted to write a conclusion in comic form (helped by the fact that the cartoon was established to be in the comic series' {{Multiverse}} in an earlier story), but ExecutiveMeddling ultimately prevented this.

* NonSingingVoice: All three hedgehogs had three separate Voice Actors for the singing segments - Creator/SamuelVincent for Sonic, Tyley Ross for Manic, and Louise Vallance for Sonia.
* RecycledScript: The episode "Winner Fakes All" has the same plot as the ''WesternAnimation/SonicSatAM'' episode "Sonic Racer", and "Sonic Tonic" is a rehash of the ''WesternAnimation/AdventuresOfSonicTheHedgehog'' episode "Full-Tilt Tails".

* TalkingToHimself: Yes, Jaleel White voices ''all three'' main characters.
* WhatCouldHaveBeen: More episodes of this show were planned, but never went beyond the planning stages. We can only wonder how it could have ended. Ian Flynn, head writer of ''ComicBook/ArchieComicsSonicTheHedgehog'', stated that he would like to write a conclusion in comic form (helped by the fact that the cartoon was established to be in the comic series' {{Multiverse}} in an earlier story), but ExecutiveMeddling ultimately prevented this. The planned story summary will appear in "Lost Hedgehog Tales," a collection of Ian's planned and scrapped stories.

** According to Ben Hurst, this series would have at one point been a continuation of ''WesternAnimation/SonicSatAM''. Instead, it was decided to retool the concept completely and make it into a separate series, much to his dismay.

* WhatCouldHaveBeen: More episodes of this show were planned, but never went beyond the planning stages. We can only wonder how it could have ended. Ian Flynn, current head writer of ''ComicBook/ArchieComicsSonicTheHedgehog'', has stated that he would like to write a conclusion in comic form (helped by the fact that the cartoon was established to be in the comic series' {{Multiverse}} in an earlier story), but ExecutiveMeddling means that there are some issues are going to have to be dealt with first.

** At first, it seemed he would finally get to make that ending. It was even briefly advertised to be in the fiftieth issue of ''Sonic Universe''. However, a different story ended up taking that slot, and the conclusion went through DevelopmentHell before it was eventually cancelled. A summary of the story will appear in "Lost Hedgehog Tales," a collection of Ian's planned and scrapped stories.

** Early concept art shows Queen Aleena(a.k.a Sonic's Mom) with a [[https://www.sonicstadium.org/2012/07/freak-out-friday-the-original-sonic-underground-concept/ different design]].

* CreatorBacklash: Ben Hurst expressed a contempt for writing for the series, disliking the premise and having a bad time working with the material of other staff. To add insult to injury, this was pitched in favor of continuing his previous beloved project, ''SonicSatam''.

** According to Ben Hurst, this series would have at one point been a continuation of ''SonicSatam''. Instead, it was decided to retool the concept completely and make it into a separate series, much to his dismay.

* CreatorBacklash: Ben Hurst expressed a contempt for writing for the series, disliking the premise and having a bad time working with the material of other staff. To add insult to injury this was pitched in favor of continuing his previous beloved project, ''SonicSatam''.

** Early concept art shows Queen Aleena(a.k.a Sonic's Mom) with a [[https://www.sonicstadium.org/2012/07/freak-out-friday-the-original-sonic-underground-concept/ different designee]].

** According to Ben Hurst, this series would have at one point been a continuation of ''SonicSatam''. Instead it was decided to retool the concept completely and make it a separate series, much to his dismay.

** Early concept art shows the Queen with a different designee.

* RecycledScript: The episode "Winner Fakes All" has the same plot as the ''WesternAnimation/SonicSatAM'' episode "Sonic Racer", and "Sonic Tonic" is a rehash of the ''AdventuresOfSonicTheHedgehog'' episode "Full-Tilt Tails".