[[foldercontrol]]

[[folder:Film]]
* DevelopmentHell: The film languished in this for over ''two decades'' because of ExecutiveMeddling from the studios and inability to come up with a script. It wouldn't be until Sony picked up the rights to where they could finally get the project off the ground.
* ExecutiveMeddling: The Sony hack revealed documents that alleged Sony would have been unable to secure the film rights to Sonic had the rumors of Sony selling Sony Pictures off at the time proved true. Thankfully, Sony publicly denied the rumors.
* WhatCouldHaveBeen: As the film had been talked about since the 1990s, there were a number of concepts that were considered before Sony ultimately picked up the project:
** In the early 1990s, Creator/MetroGoldwynMayer optioned the rights to produce a ''Sonic the Hedgehog'' film, pressing it for release in 1994 and 1995. After studio executives shot down proposals for an animated film, they proposed two concepts for the film. The first concept featured a young boy who suffers a tragic accident that later gives him the ability to morph into a hedgehog, and the boy decides to use his new power for promoting good. The second concept had a more RogerRabbitEffect-like plot, where the Sonic characters, this time animated entirely, end up trapped in the real world and try to find a way to get back home. As one may have noticed, these concepts have [[InNameOnly virtually nothing to do with the source material]], and Creator/{{Sega}}, dissatisfied with MGM's debasement of the franchise, demanded rewrites. By that time, the failure of the ''Film/SuperMarioBros'' film caused MGM to grow nervous about movies based off video games. By the time the UsefulNotes/SegaSaturn was released to under-performance, MGM decided the ''Sonic'' film rights had no value and canceled the project. As the film had no scripts nor was it ever announced, the film remained unknown for decades until author Blake J. Harris uncovered details of the scrapped project in his book ''Console Wars''.
** After MGM's attempt to bring Sonic to the silver screen failed, Ben Hurst, one of the writers for ''WesternAnimation/SonicSatAM'', attempted to pitch a movie in an attempt to revive the old Saturday Morning universe, this time fully animated. However, it's said that Ken Penders, then-head writer of ''ComicBook/ArchieComicsSonicTheHedgehog'', got wind of this attempt and, after initially working with Ben, apparently killed his attempt by claiming to Sega that he was trying to co-opt the franchise. To add insult to injury, Penders ''then'' brought up his own concept for a movie. [[http://25.media.tumblr.com/tumblr_lyktrobz2X1rnsvazo1_1280.jpg There are]] [[http://25.media.tumblr.com/tumblr_lylc0kRkIL1rnsvazo1_1280.jpg four]] [[http://25.media.tumblr.com/tumblr_lymvifew3F1rnsvazo1_1280.jpg concept]] [[http://31.media.tumblr.com/tumblr_lynaxxdjHE1rnsvazo1_1280.jpg pieces]] for the movie. The movie seems to work in the idea that Mobius would have been destroyed and that roboticization would be a much more gruesome procedure than was shown in the cartoons and comics. A number of major characters are not shown and a few of them have major redesigns (the biggest being Snively, who's now more cyborg-like). There was some interest, but at the time ''Anime/SonicX'' was being made and they felt it wouldn't be worthwhile to have two running series in two different continuities, so it was backburnered, then dropped completely.
** Sony tapped screenwriters ranging from Creator/BradBird (who declined due to his commitments to ''Film/{{Tomorrowland}}''), [[Film/{{Zombieland}} Wernick & Reese]] (who would go on to write ''Film/{{Deadpool}}''), [[Film/WreckItRalph Phil Johnston]] (declined in favor of ''Disney/{{Zootopia}}'', though he did co-write ''[[Film/{{Grimsby}} The Brothers Grimsby]]'' with star Creator/SachaBaronCohen for Sony later) and [[Film/{{Elf}} David]] [[Film/TheSpiderwickChronicles Berenbaum]] to write their take of the film before going with newcomers Evan Susser and Van Robichaux.
[[/folder]]

[[folder:Games]]
* AdaptationOverdosed: An [[Anime/SonicX anime]], [[ComicBook/SonicX an adaptation of that anime]], an [[Anime/SonicTheHedgehogTheMovie OVA]], a [[ComicBook/ArchieComicsSonicTheHedgehog US comic]], a [[ComicBook/SonicTheComic UK comic]], four animated series, several {{Manga}}, a short-lived French comic, and numerous book adaptations.
* AscendedMeme: On [[http://blogs.sega.com/2012/09/05/fast-cars-and-fast-hogs-now-on-sale/ their official website]], Sega used the "Gotta go fast!" meme in an announcement about ''Sonic 4: Episode II'' being on sale.
* AuthorExistenceFailure: Deem Bristow, the original video game VA for Dr. Robotnik ([[IHaveManyNames Or Eggman]]), passed away in January 2005, just months after the release of ''Sonic Advance 3'', his final role.
** Long John Baldry, another Robotnik VA, on ''WesternAnimation/AdventuresOfSonicTheHedgehog'', passed away just 6 months after Bristow.
** Also, in Mexico, Maynardo Zavala, who also voiced Robotnik in the Mexican Spanish dub of ''The Adventures of Sonic The Hedgehog'', died in 2011.
** Steve Sheppard-Brodie, the original voice of E-102 Gamma and Pacachamac, died of cancer on August 10, 2001, the same day VideoGame/SonicAdventure2 was released.
** Creator/MaddieBlaustein, the third voice of E-123 Omega and the President, died in 2008.
** Creator/ChikaoOhtsuka, the Japanese voice of Doctor Eggman, died in January 2015
** Vyacheslav Baranov, who voiced Dr.Eggman and Knuckles in Russian dub of Sonic X, passed away in 2012.
* BreakthroughHit: It was the first ''VideoGame/SonicTheHedgehog'' that put Creator/{{Sega}} on the map as a gaming company and SonicTeam as a premier development team.
* CashCowFranchise / AdoredByTheNetwork: Even after Sega got out of the console business, it's still Sega's premiere franchise, and one of the very few of their original series that still has games regularly made for it, and it has the most supplemental material and tie ins out of all their series.
* ChristmasRushed: The series has a long history of using this:
** VideoGame/SonicTheHedgehog2 had a lot of content cut from it to meet the deadline, most famously the Hidden Palace Zone. There are also some nasty glitches that occasionally pop up, such as triggering Super Sonic at the end of a level [[GameBreakingBug locking the game in place]] and forcing you to reset it.
** VideoGame/SonicSpinball was hastily made in six months as a holdover game, since VideoGame/SonicTheHedgehog3 was taking longer than expected to finish. The game didn't turn out bad at all, but it does have an unpolished feel to it as a result.
** VideoGame/SonicTheHedgehog3 was such an ambitious game, that it became clear that it would be impossible to finish it as a whole in time, forcing Sega to split the entire game in half, and even then Sonic 3 arrived later than expected (February 1994), with Sonic & Knuckles arriving eight months later with its Lock-On Technology added to allow Sonic 3 to be played as it was originally planned. It didn't help that McDonald's, who had a tie-in deal with the game, ended up pushing Happy Meal toys before the game was released, forcing Sega's hand in the entire thing. On top of that, both games are loaded of glitches and polish issues, some of which are [[GameBreakingBug game breaking]], to the point where the manual had to handwave these issues (such as Sonic being liable to accidentally get stuck in certain scenery or Tails sometimes being unable to complete Hydrocity in standalone Sonic 3 due to the screen locking up) as "diabolical traps" set up by Robotnik.
** The Saturn port of VideoGame/Sonic3DBlast was scrambled together in four months to make up for the delay and cancellation of Sonic X-Treme. It ended up being a [[PolishedPort surprisingly good port.]]
** VideoGame/SonicR was obviously rushed to give the Saturn a KillerApp, and it backfired--while there aren't a lot of obvious glitches, there are only five race courses, the controls handle poorly, and the racers are poorly balanced. There is also a bug in the Saturn version (fixed in the PC and Gems Collection port) of the game that got corrected in later releases that creates an odd example of Fake Longevity: if you complete a course with the Chaos Emeralds, all the Sonic medallions, and finish first (which is required to hold onto the Chaos Emeralds after the race ends), you go onto fight the course boss as usual but when that race is over, it negates the first place victory you won in the original race and you can't keep the Chaos Emerald(s) you collected. Thus you have to redo the course to get the Emeralds (meaning there's no point in trying to do both things because they're mutually exclusive).
** VideoGame/SonicAdventure was rushed for its original Japanese release and was loaded with glitches, forcing Sonic Team to delay the U.S. release by a year to patch it up. Even then, the game still has loads of glitches, so it's very easy to break wide open, most notably in the DX port, which adds even more glitches than the original Dreamcast game.
** VideoGame/SonicTheHedgehog2006 is by far the most infamous instance of this, although information of its development made it clear it had the deck stacked against it--Sonic Team was forced to develop the game with half of its usual manpower--Yuji Naka had just left Sega and the other half of the team was busy working on VideoGame/SonicAndTheSecretRings, which was made to make up for the fact that Sonic 2006 was impossible to port to the {{Wii}}, and they had to make the game for two advanced, brand new consoles. On top of that, Sega wanted the game out in time for Sonic's 15th Anniversary, so Sonic Team was forced to rush the game out the door and disregard bug testing and quality assurance. The final result was a game that left a black mark on the series and Sega's reputation forever, and one of the most infamous video games ever made.
** The 3DS version of VideoGame/SonicGenerations, which was rushed out in about 6 months or so, compared to the console versions which were in concept since at least 2008. While the final product certainly wasn't a disaster by any stretch, it lacks content compared to the console versions and it's obvious that some corners were cut (including the rival races, which take place on improbable stages).
** [[VideoGame/SonicBoom Sonic Boom: Rise Of Lyric]], initially planned for an unspecified console and [[DevelopmentHell spending years in]] [[TroubledProduction turbulent development]], was hastily ported to the Wii U, without being given any time to accommodate the Cry Engine 3 for the console, for a release in mid November 2014, and [[ObviousBeta its clearly unfinished state shows for it]], resulting in both the worst reviewed and worst selling major Sonic title to date.
* CowboyBebopAtHisComputer: There are a small number of fans who, be it out of ignorance, [[CriticalResearchFailure research failure]] or a schism between fans of the newer and older games, take the dub induced naming scheme of Robotnik having the nickname of Eggman with his real name put off to the side as meaning they're both ''two seperate characters'' [[note]] Ironically, this ''is'' the case in the [[ComicBook/SonicTheHedgehog Archie Sonic comics]], because the old Robotnik and new Eggman are in fact two seperate characters, the new one being an alternate dimension counterpart of the former, with a similar enough backstory and personality to where he serves as an interchangeable replacement with the original Robotnik, who was [[KilledOffForReal permanently killed off]] in issue 50 and, as of the timeline reboot, [[DeaderThanDead literally erased from ever existing.]] This also saved the writers the trouble of giving exposition about the two different Robotniks, which they felt would risk [[ContinuityLockout confusing or alienating new readers.]] [[/note]], or, if they're really, really on the ball, say that Robotnik is Eggman's grandfather, both of which are completely contradicted by canon, not only because it's blatantly two names of the same character, but because Eggman already has a grandfather in canon--whose surname ''is'' Robotnik granted, but Gerald is obviously a seperate character from his grandson Ivo in both appearance and personality (both before and after [[OmnicidalManiac his tragic descent into veangeful madness]]), and had died long before Sonic was even born.
* CrossDressingVoices:
** Sonic has actually been voiced by at least three women -- Keiko Utoku in ''VideoGame/SonicTheHedgehogCD'', Creator/KeikoToda in the Japanese dub of ''WesternAnimation/SonicUnderground'', and Meg Inglima in ''VideoGame/SonicsSchoolhouse''.
** Tails used to be voiced by young boys, but since ''Anime/SonicX'', he has been voiced by women. In the Japanese versions, he has been voiced by one single woman since ''VideoGame/SonicHeroes'' and ''Sonic X''.
* CreatorBacklash:
** The Director of Sonic Adventure 2 was so angry at the negative reception for Big the Cat in [[VideoGame/SonicAdventure the previous game]] that he took personal offense to it and put Big the Cat as a hidden secret in every stage as a spiteful act of vengeance towards everyone (curiously, almost all of Big's cameos ended up being removed in the GameCube port).
** Mild, but Yuji Naka said that he feels the more recent Sonic games aren't as fun as the older ones, his main complaint being that [[ItsEasySoItSucks they're too easy.]]
** Sega has deliberately been pulling recent Sonic titles with a below average metacritic score out of circulation [[AuthorsSavingThrow in an attempt by them to improve Sonic's quality image.]] And for [[ObviousBeta obvious]] [[ChristmasRushed reasons]], they're not too fond of Sonic 2006 and the [[NeverLiveItDown black mark PR damage]] it gave them, even firing its writers after the game was released and apologizing for its multiple issues. Despite including (refined) elements of it in the series MilestoneCelebration, ''VideoGame/SonicGenerations'', Sega was [[SelfDeprecation modest enough to joke about its mixed reputation in one ad]]; while it was very impartial to the previous Sonic games it celebrated, once it got to Sonic the Hedgehog (2006), the music stopped and Sonic got an angry look on his face.
** On the subject of the newer games, the new development staff of Sonic Team admitted in Magazine/NintendoPower in a preview feature on Sonic Colors that the were-hog elements of Sonic Unleashed and the swordplay of Sonic and the Black Knight were not good ideas; and based Colors largely around the well-received day stages of the former.
** Yuji Naka and Takashi Iizuka have both publicly apologized for the [[GuideDangIt infamous]] [[FanNickname Barrel of Doom]] from "Carnival Night Zone" in VideoGame/SonicTheHedgehog3, as seen [[http://m.youtube.com/watch?v=3XeBgeN5uG8 here.]]
** Sonic Team openly despised the early [[AmericanKirbyIsHardcore American "Mohawk quill" redesign]] of Sonic featured in box and promo art, even seeing it as redundant because Sonic was designed to appeal to western audiences in the first place, and only relented when they felt that it and other Americanized changes to the series did help Sonic get off the ground in the long run. It became a moot point when the redesign was retired in artwork in favor of the original japan design by the mid 90s.
* CreatorKiller: While going through [[TroubledProduction the disastrous production of]] [[VaporWare Sonic X-Treme]], Chris Coffin, the games lead programmer, contracted pneumonia from overworking to try and get the game finished in time, and he was told he had 6 months to live, forcing him to drop out of the project. However, he survived and continues to work on video games as Christina Coffin. The games turbulent production and cancellation also led to the company making it, the Sega Technical Institute, getting dissolved.
** After ''VideoGame/SonicBoom: Rise of Lyric'' proved to be a critical disaster and an embarrassing flop at retail (it's the the absolute ''worst'' reviewed Sonic game on [[http://www.metacritic.com/game/wii-u/sonic-boom-rise-of-lyric Metacritic,]] [[UpToEleven with It's metascore being even lower than Sonic 06]], was outsold by two other Sega games [[note]]''Alien: Isolation'' and ''Football Manager''[[/note]] and didn't even break into the top 40 sales chart in the UK), and combined with many staffers leaving or getting fired during its turbulent production, it seems unlikely that the fledging game company Big Red Button Entertainment will ever make another game again.
* DuelingGames: The first game with ''VideoGame/SuperMarioWorld'', a launch title for Creator/{{Nintendo}}'s answer to the Genesis, the SuperNES.
* ExecutiveMeddling:
** The unfortunate cause of ''Sonic X-Treme's'' {{Vaporware}} status, as well as the replacement of all the game voice actors with their ''SonicX'' counterparts.
** Executives often meddled to get games out for a Christmas release. It happened, but not too consequently, in some of the classic games. The original Japanese VideoGame/SonicAdventure was buggy, and that's why they made a rerelease there with all the fixes made in the English version.
** This is the reasoning behind the unfortunate state of ''[[VideoGame/SonicTheHedgehog2006 Sonic 2006]]'' also; it was rushed out to release in time for both the Christmas period and Sonic's 15th Anniversary, and as a result is [[ObviousBeta wrought with bugs]] and is quite obviously unfinished.
** The reason Classic Sonic rarely appears in newer games is because Sega has a mandate that Modern and Classic Sonic can't appear alongside each other unless time travel is involved (such was the case with VideoGame/SonicGenerations). Classic Sonic was considered for an appearance in ''Sega & Sonic All Stars Racing Transformed'', but Sega shot it down for this reason. Their [[https://www.sonicstadium.org/2014/11/a-not-so-little-look-at-sonic-the-hedgehog-2014-classic-style-guide/ style guide]] also says that Classic and Modern Sonic artwork cannot be combined in any product.
** The developers of the [[VideoGame/MarioAndSonicAtTheOlympicGames Mario & Sonic games]] [[http://www.shacknews.com/article/71640/how-mario-and-sonic-get-outfitted-for-the-olympics found out]] that Sega [[LimitedWardrobe will not allow Sonic to be shown without his shoes.]]
* FandomLifeCycle: Has hovered around Stage 5 (full mainstream status) since the beginning, even though it is not as big as the in the early 1990s.
* FanNickname: Several over the past two decades, but the most recent and most amusing nickname Sonic has been referred is "Generic Sonic", as his current design is referred to in the coding for the ''Generations'' demo.
* FranchiseKiller: The franchise has somehow managed to avoid this despite the reception of most of the modern Sonic games ([[CashCowFranchise due to him being]] [[AdoredByTheNetwork one of Sega's few cash cows]]). That said, all of his spinoffs have been given the axe over the years, to the point that only the main series of games are keeping the series afloat. To wit:
** There were only two games in the spinoff ''[[VideoGame/SonicStorybookSeries Storybook Series]]'', as ''Sonic and the Black Knight'' failed to impress.
** After years of dormancy, the original "classic" branch of ''Sonic The Hedgehog'' games that kickstarted the franchise on the UsefulNotes/SegaGenesis was given a new installment through the downloadable ''VideoGame/SonicTheHedgehog4'' series, beginning with ''Episode I''. The game received relatively positive reviews from critics and sold well enough to get a second episode greenlit; but also [[BrokenBase split the fanbase]] [[TheyChangedItNowItSucks for the changes it made]] to the legacy gameplay and [[ItsTheSameSoItSucks recycled content]], and was widely declared by fans of the Genesis games ([[http://uk.ign.com/articles/2010/11/25/top-ten-biggest-gaming-disappointments-of-2010-4 and]] [[http://kotaku.com/5720176/the-year-in-disappointments reviewers]] in retrospective pieces) as a disappointing sequel. The HypeBacklash was so great that Sonic Team, prior to ''Episode II''[='s=] release, said ''Episode II'''s reception would determine on whether they would continue the series. Needless to say, ''Episode II'' was released to critical and commercial indifference, which led to a planned third episode being canned and the classic series (once again) sent to an early grave.
** After ''VideoGame/{{Sonic Rush|Series}} Adventure'' underperformed in sales, all handheld Sonic games since then have been handheld counterparts of Sonic Team's console games, rather than their [[VideoGame/SonicAdvanceTrilogy own]] [[VideoGame/SonicRushSeries individual]] [[VideoGame/SonicRivals series]], something the franchise hadn't completely done since the UsefulNotes/GameGear port of ''VideoGame/SonicSpinball''.
** The ''VideoGame/SonicRiders'' line of racing spinoff games was killed off by the Xbox 360/{{Kinect}}-exclusive third game ''Free Riders'' (though it's possible that with the advent of the ''[[VideoGame/SegaSuperstars Sega All-Stars]]'' line of racing games, Sega likely had no plans to continue past the third game anyway). The game was roundly ripped apart by reviewers and fans alike for its atrocious control scheme that was (poorly) designed to utilize the movement of the player's entire body for input and was the only method provided for playing and navigating through the game (compared to the previous two games, which used traditional controllers and used or offered traditional control schemes).
** ''[[VideoGame/SonicBoom Sonic Boom: Rise of Lyric]]'' was a critical disaster and an embarrassing flop on release--to date, its the worst reviewed ''and'' worst selling major Sonic title yet at around 300,000 units sold worldwide--even the [[SoOkayItsAverage slightly better received DS spinoff]], ''Shattered Crystal'', only sold a paltry 200,000 units. To put this in perspective, Sega's headlining franchise was outsold several times over by another Sega title from the same year, ''VideoGame/AlienIsolation'' at around 2,000,000 units worldwide. [[CreatorKiller It killed the company that made it]] (Big Red Button Entertainment), and there are currently no plans for more console games in the ''Boom'' series. The comic book adaptation for it ended after a scant eleven issues. The only hint of it surviving is a delayed DS follow up called ''Fire and Ice'', which is being developed by Sanzaru Games, and its tie-in cartoon getting a second season.
* FranchiseZombie: Sonic is the poster child of this in video games. The majority of the original Sonic Team staff that worked on the well-received Sonic games for the UsefulNotes/SegaGenesis (including the original three creators of the series-programmer Yuji Naka, character designer Naoto Ohshima, and game director Hirokazu Yasuhara) have long left Sega, and none of Sonic's games released since then have reached the heights of those games, specifically due to the franchise's inconsistent quality ever [[PolygonCeiling since it transitioned into 3D gameplay]]. The series is still around due to its status as a mascot for Sega and being the publisher's [[CashCowFranchise few cash cows]], thanks to the franchise's persistent fanbase containing to support the games enough for them to turn a profit while always declaring that the ''next'' game will be the one that finally "brings Sonic back". This is despite Sega [[VideoGame/ShadowTheHedgehog releasing games]] [[VideoGame/SonicTheHedgehog2006 that many]] [[VideoGame/SonicBoom would argue]] should have [[FranchiseKiller put the series in its grave]] years ago (with ''Sonic 2006'' and ''Sonic Boom: Rise of Lyric'' in particular frequently cited as two of the worst video games ever due to their [[ObviousBeta numerous technical issues]] and poorly-received gameplay). Even Sega's attempts at revitalizing the 2D platformer branch of Sonic with ''VideoGame/SonicTheHedgehog4'' were not as well-received as the Genesis games with critics and ([[ContestedSequel especially]]) by fans. In fact, the series showed signs of being a zombie even before the original creators left the series-after the series hit its peak with ''[[VideoGame/Sonic3AndKnuckles Sonic 3 & Knuckles]]'', Sonic Team focused on [[VideoGame/{{Ristar}} making]] [[VideoGame/NIGHTSIntoDreams original]] [[VideoGame/BurningRangers titles]]; whereas Sega tried to continue the ''Sonic'' franchise without them to no success. After Sega Technical Institute's ''Sonic X-treme'' -Sonic's intended VideoGame3DLeap on the UsefulNotes/SegaSaturn- [[{{Vaporware}} failed to make it to shelves]], Sega finally got Sonic Team back to give the series [[VideoGame/SonicAdventure a proper 3D title]] for the UsefulNotes/SegaDreamcast. [[note]]Even then, ''Sonic Adventure'' (which had Naka and Ohshima on board) was the last game with any of Sonic's creators working directly on a ''Sonic'' game. Ohshima left Sega after ''Sonic Adventure'' finished development in 1998 to form Artoon, largely due to a strained relationship with Naka over the series' direction. Yasuhara didn't participate in ''Sonic Adventure'' because he had quit Sonic Team after ''Sonic 3 & Knuckles'' -for the same reasons Ohshima left Sonic Team-, ultimately leaving Sega for NaughtyDog in 2002. Naka himself left Sega in 2006 to form Prope as he was tired of [[KickedUpstairs being stuck with (executive) producer roles]] for original [=IPs=] made by Sonic Team.[[/note]]
* FountainOfExpies: Sonic, as mentioned in FollowTheLeader.
* GeniusBonus: Planet Mobius was named for the Möbius strip, a reference to the loop-de-loops founds in the original ''Sonic'' game and its sequels. Neat, eh?
* KeepCirculatingTheTapes: The bulk of the original games have seen a rerelease in some form, but there are a handful of titles that haven't and probably won't get ports anytime soon, including ''VideoGame/KnucklesChaotix'' (likely due to Sega not wanting to waste time coding a 32X emulator for one game) and the arcade game ''VideoGame/SegaSonicTheHedgehog'' (the reason that is often given is due to the original machine having a unique control input that would be hard to mimic on a keyboard or controller).
* KillerApp: The original Sonic games for the UsefulNotes/SegaGenesis, and arguably the ''Sonic Adventure'' games for the Dreamcast (at the time).
* MemeAcknowledgment: After a new PR person was hired, [[https://twitter.com/sonic_hedgehog/with_replies the series' official Twitter]] [[UpToEleven went into overdrive]] with the memes. It's referenced [[https://twitter.com/sonic_hedgehog/status/608763896040726528 the Tails Doll]], [[https://twitter.com/sonic_hedgehog/status/608824863629975552 "It's no use"]], [[https://twitter.com/sonic_hedgehog/status/609085969942376449 "original character do not steal"]], [[https://twitter.com/sonic_hedgehog/status/608823635499958272 "Strange, isn't it?"]], [[https://twitter.com/sonic_hedgehog/status/608359346863542273 the Barrel of Doom]], [[https://twitter.com/sonic_hedgehog/status/608722820739293185 “Bounce Pad!”]], [[https://twitter.com/sonic_hedgehog/status/608802671911444481 Knuckles']] [[https://twitter.com/sonic_hedgehog/status/608802671911444481 rap music]], [[https://twitter.com/sonic_hedgehog/status/608343347623796736 Sonic 06's load times]] [[https://twitter.com/sonic_hedgehog/status/608822114368544769 and infamous kiss scene]], [[https://twitter.com/sonic_hedgehog/status/608354712149237760 both versions]] [[https://twitter.com/sonic_hedgehog/status/609115871747833856 of “Sanic”]], and [[https://twitter.com/sonic_hedgehog/status/608718532529037312 even]] ''Webcomic/{{Sonichu}}'' – culminating in [[https://twitter.com/sonic_hedgehog/status/608802671911444481 a contest]] devoted to the “& Knuckles” meme.
* MidDevelopmentGenreShift: The initial concept was a more traditional platformer with puzzles and exploration akin to ''VideoGame/SuperMarioBros2''. The final product, while still a platformer, focused more dominantly on its now trademark speed. This evolution is even more prominent in [[VideoGame/SonicTheHedgehog2 its sequel]].
* OldShame:
** [[http://www.youtube.com/watch?v=znt9k40nLN4 This]] trailer showing clips of the various Sonic console games throughout the years, with Sonic himself looking pretty exasperated once they get to ''VideoGame/SonicHeroes'' (around the time the critical backlash of the games began). Also, much more polished beta footage of ''[[VideoGame/SonicTheHedgehog2006 '06]]'' is used, as well as only the daytime stages of ''[[VideoGame/SonicUnleashed Unleashed]]''. However, ''[[SonicStorybookSeries Sonic and the Black Knight]]'' is completely omitted from the video, whilst it's predecessor, ''Sonic and the Secret Rings'' notably ''wasn't''.
** Jon St. John voiced Big in ''VideoGame/SonicAdventure'', ''VideoGame/SonicShuffle'' and ''VideoGame/SonicHeroes''. He later regretted doing so, going as far as deliberately forgetting how to do Big's voice just so he wouldn't get any call backs.
* TheOtherDarrin: The series have gone through a veritable revolving door of voice actors throughout the years, some more controversial than others. Tails, in particular, has gone through more voice actors switches than any other character. In both the English AND Japanese versions.
** Taking over from Creator/ChikaoOhtsuka as the Japanese voice of Dr. Eggman is Masaharu Satō, who previously voiced the doctor ''way'' back in ''VideoGame/SegaSonicTheHedgehog''.
* PortOverdosed: The original 1991 game. There is hardly a platform for which Sega has not released a version since going third-party.
* PromotedFanboy: Pop trio Cash Cash, the people responsible for the vocals in [[VideoGame/SonicColors "Reach for the Stars"]] and some of the tracks in ''VideoGame/SonicGenerations'', are big Sonic fans themselves.
* ProductionNickname: Orbot's was SA-55, a Letters2Numbers rendition of "[[MeaningfulName sass]]". Likewise, Cubot's was shown in comics to be IDI-07, "idiot".
* SerendipityWritesThePlot: After the ability was added in to ''VideoGame/SonicAdventure2'' for the sake of promoting a real life shoe brand, Sonic and Co. retained the ability to grind on rails.
* ScrewedByTheLawyers: The series has a lot of legal baggage tied around it:
** The reason the original Sonic the Hedgehog theme is so rarely heard is because the rights to the song are owned by Dreams Come True, and Sega has to pay royalties to them for using it. They almost ran into trouble with this in VideoGame/SonicSpinball, which originally used the theme without authorization from Dreams Come True under the assumption that Sega owned the song--they found out it was not the case just days before shipping, so the song was hastily DummiedOut of the game and replaced with new music.
** The vocals for the japanese Sonic CD soundtrack were replaced with instrumentals for the HD port due to unforeseen legal issues regarding the rights to them.
** According to Cirocco Jones (mistakenly credited as Scirocco in the Sonic 3 credits), there's a huge legal mess concerning the music used in VideoGame/Sonic3AndKnuckles, likely due to unpaid royalties, improperly crediting the musicians, or (as was the case with Dreams Come True), licensing issues. Considering that two of the music composers (Creator/MichaelJackson and Brad Buxer) directly sampled songs from their respective discographies, the latter is the most likely. It's generally believed this is the reason why a Taxman/Stealth remaster like the first two Genesis games is unlikely, as Sega has only been able to release direct emulations of the original game or recoded versions with different music (as seen in the PC version).
** Sega was forced to put a legally mandated embargo on elements and characters of certain Sonic games and series [[ExiledFromContinuity from being used in each other]] (for example, characters exclusive to the Satam Sonic cartoon and Archie comics are barred from appearing in the games, and even characters from the main games like Eggman Nega and Black Doom were barred from comic appearances) due to Sega of America and Sega of Japan having separate copyrights on elements of the Sonic series, as well as other studios that co produced certain Sonic works, like TMS and 4kids having their own stakes with elements exclusive to series like Sonic X.
* TalkingToHimself: In ''Anime/SonicX'' and the games through 2005-2010, Creator/JasonGriffith did both Sonic and Shadow — not to mention Jet the Hawk in ''VideoGame/SonicRiders''. JaleelWhite also voiced Sonic, Sonia, and Manic in ''WesternAnimation/SonicUnderground''. Ryan Drummond who portrayed played Sonic in the old(er) pre-4Kids games also voiced Knuckles in ''VideoGame/SonicShuffle''. On top of that, he and Metal Sonic shared the same voice actor in both the Japanese and American versions of ''VideoGame/SonicHeroes''.
* TropeNamer for:
** BadFuture
** CasinoPark
** EternalEngine
** GreenHillZone
** PalmtreePanic
** SuperMode
** UltimateLifeForm
* TroubledProduction: The series has a history of games being made under strained conditions;
** ''VideoGame/SonicTheHedgehog2''[='=]s own history can be chronicled by the various Alphas, Betas and Deltas made along the way. Rumor had it that ''2'' was supposed to utilize TimeTravel, but it proved way too complicated for the simplistic Sega Genesis. Many Zones were planned and removed, including a curiously named stage called Genocide City and the legendary Hidden Palace Zone (which was much later restored as a secret level in the iOS remake). Sega gave Creator/{{Nickelodeon}} a very early version of ''2'' for ''NickArcade''. The game's production (located in Sega Technical Institute's headquarters) was also notorious for language barriers and conflicting work ethics between Japanese Sonic Team members, who Naka brought to the United States to work on the game as he was unhappy with Sega of Japan's policies; and the American STI members, who assisted in the game's development. (Understandably enough, Naka developed ''Sonic 3 & Knuckles'' in STI on the condition that only his fellow Sonic Team members and other Japanese STI staff would develop the title to avoid another instance of this.)
*** An HD FanRemake of ''VideoGame/SonicTheHedgehog2'' was cancelled in 2012 when the lead programmer, [=LOst=], had CreativeDifferences with the rest of the team and provided a build of the game with DRM protection. Since he had not released the source code for the game's engine, the game could not be updated. Production resumed in 2014 when a fan of the project developed a replacement engine.
** ''[[VideoGame/Sonic3AndKnuckles Sonic & Hedgehog 3]]'' and ''Sonic & Knuckles'' were once planned to be one big game, just the basic ''Sonic the Hedgehog 3''. However, time restraints forced Sega to split the game in two in time for ''3'''s release, leaving many fans to wonder what these other stages were once they put in the ''insanely difficult'' Stage Select code. When ''Sonic & Knuckles'' was being made, the initial plan was that it could hook up to ''VideoGame/SonicTheHedgehog1'', ''VideoGame/SonicTheHedgehog2'' and ''Sonic the Hedgehog 3'' for new playing adventures. However, complications with the code in ''Sonic the Hedgehog'' forced them to scrap it and replace it with the Blue Spheres mini game collection. It was initially said that Knuckles gliding onto a treadmill in Scrap Brain Zone caused the game to crash. However, it was revealed later on that it was because most of the game's graphics was [[DarthWiki/IdiotProgramming built around Sonic's color palette]], and introducing Knuckles would end up changing every other graphic in the game. A fan did a hack years later by reducing Knuckles' color scheme to match the games' limited palette. Due to the introduction of Super Sonic in ''VideoGame/SonicTheHedgehog2'', that game did not suffer such problems.
*** And then Music/MichaelJackson's rumored involvement in the game's music is a whole story of its own, which ranges from anonymous credits and dropped finished tracks because of his child molestation allegations, to him being dissatisfied with the Genesis sound hardware.
*** According to the [=PixN'Love=] ''History of Sonic the Hedgehog'' book, the "Time Restraints" problem turned out to be a business deal with [=McDonalds=] -- [=McDonalds=] had set up a deal for Sonic 3-related Happy Meal toys, expecting a Christmas release. However, when that didn't happen, Sega was forced to rush ''Sonic 3'' out with just the six stages. With as big as ''Sonic 3'' was, stage-wise, it wasn't ''too'' bad of a strike.
** ''Sonic X-treme'' is perhaps the most tragic example of all as, unlike the other examples here, [[{{Vaporware}} the game was never finished]]. Many things went wrong with the development of what was supposed to be Sonic's VideoGame3DLeap on the UsefulNotes/SegaSaturn.
*** For starters, what would eventually become ''Sonic X-treme'' for the Sega Saturn [[DevelopmentHell was actually the byproduct of a slew of several failed pitches]] for a Sonic game developed by Sega Technical Institute, which underwent many ideas for stories, game design, and even platforms (with the game planned for the UsefulNotes/SegaGenesis, and then its add-on the Sega 32X, before finally being settled for the Saturn).
*** When development finally got underway, the development staff was comprised of two teams: one for the main levels, led by lead designer Chris Senn and lead programmer Ofer Alon; the other for the boss levels, led by programmer Chris Coffin. Despite the presence of a project overseer -Mike Wallis- to monitor both teams, the two groups ended up practically building two separate games with minimal similarities to each other. Not helping matters were the smaller teams that formed within the main teams and proceeded to work on different aspects of the game's development, who while in theory were supposed to ease the development process made it more cumbersome in practice. This ultimately contributed to an overall lack of communication across the development team, which led to high tensions between both groups, not at all helped by Ofer's seclusive tendencies from the rest of his team.
*** The development team for the main levels frequently ran into problems [[PortingDisaster porting the engine to the Saturn]]-the game was originally programmed on a Mac computer, then quickly ported a PC before finally ported to Saturn. While the game ran smoothly on Mac and PC, the Saturn port had atrocious framerate issues, with the game playing at a consistently sluggish ''3-4'' FPS. This along with the aforementioned rocky relationship within the studio led to constant delays in the game's development cycle.
*** As a result of all this, Sega of America [[ExecutiveMeddling finally forced their hand in the development process]] by bringing in third-party developer Point-Of-View (POV for short) to smooth out the development process...unfortunately, [[FromBadToWorse this only deepened the cracks that would lead to the collapse of the game's development.]] Despite POV's intended role being to assist porting the main game's engine to the Saturn, they ultimately took over development duties from Alon -- a decision which wouldn't had been so bad if POV didn't prove themselves largely inexperienced to the task. A very basic image of Sonic on a checkerboard background was what POV presented to demonstrate their programming skills (to say Senn and Alon were unimpressed would be an understatement), topped off by the developer also being unsuccessful at porting Alon's engine to the Saturn. Despite this change in the development process, a new group comprised of the main engine's original team was later established by Alon and Senn to continue their own work on the main engine.
*** This all culminated into [[TaintedByThePreview a horribly botched presentation]] of the game to a group of Sega of Japan's representatives -- which included then-President Hayao Nakayama -- who visited STI's headquarters in March of 1996 to check out the game's progress. While the original team was polishing up their engine for a presentation to the [=SoJ=] staff (which had undergone a lot of development and had also been successfully ported to the Saturn), unknowingly to them another presentation with [=POV=]'s failed attempts to run an older version of Alon's engine on the Saturn had already been shown to the [=SoJ=] staff, with Nakayama being disgusted with the results. This was followed by a presentation of Coffin's boss engine in action, which led to Nakayama [[ExecutiveMeddling ordering for the entire game to be designed around that engine]] [[ScrewedByTheNetwork and be completed for that year's holiday season]]. Despite Senn's best efforts to persuade them to stay a while longer to see their newer version of Alon's engine, they ultimately failed to convince the representatives to view the new engine.
*** As a result, development from this point forward was largely restricted to Coffin's team to finish the game in time for the fast-approaching holiday season deadline, with [=POV=], Ofer's team, and all work on the main engine effectively cancelled from the development process. In desperation, Coffin's team asked for and was granted use of the engine used in ''[[NiGHTS NiGHTS Into Dreams...]]'' to hasten development so the game would be finished on time. After getting accustomed to the engine's use after two weeks, the engine was taken away due to ''[=NiGHTS=]/Sonic'' creator Yuji Naka learning about the engine's use (the engine had been taken without his consent) and threatening to quit Sega if the team continued using his engine, sending the team back to square one.[[note]]An altenative report that also exists claims that Coffin used ''NiGHTS'' as an inspiration when designing the game's levels, of which Naka may have mistaken as his engine being used and Naka's threats leading to Coffin having to scrap the similarly designed levels he had made by that point.[[/note]] All of this resulted in Coffin doing most of the work himself, tirelessly working 20 hours a day and sleeping in the offices. When he contracted pneumonia and doctors told him he had only 6 months to live if he kept working as he did, he was forced to exit development, and thus Wallis being forced to tell his superiors that the game would not be completed in time for Christmas. By that point, there was no other choice but to pull the plug on the game, with an later attempt by Senn and Ofer to get their work on the game released on PC rejected.
*** ''Sonic X-treme's'' failure to show up on shelves has been largely pointed to as a reason as to why the Sega Saturn was a commercial failure, as the hole left in its wake meant that the Sonic series (whose 2D platforming entries sold millions on the Sega Genesis) would not see a proper platforming installment released on the system and left the Saturn without a guaranteed KillerApp for its system (not helped by the fact that rivals Nintendo and Sony had brought to the table [[VideoGame/SuperMario64 their own]] [[VideoGame/CrashBandicoot1996 3D platformer offerings]] for their respective consoles earlier that year). The Sonic series wouldn't receive a 3D installment until Sega got Sonic Team to [[VideoGame/SonicAdventure revamp the series]] for the UsefulNotes/SegaDreamcast. The game's cancellation has also been blamed for developer STI [[CreatorKiller dissolving shortly afterwards.]]
** ''VideoGame/SonicTheHedgehog2006'' also ended up as a victim of this -- although the game, unlike ''X-treme'', was released, [[ObviousBeta the final product was likewise]] ''[[ObviousBeta far]]'' [[ObviousBeta from finished]]. After Yuji Naka -- one of the founding members of the ''Sonic'' franchise -- resigned from Sega and consequently left ongoing development of the game, massive pressure was then put on the game's director Shun Nakamura and the rest of the development team to have the game ([[ToughActToFollow which was supposed to be another great Sonic game that would be used to help re-launch the franchise on next-gen consoles]]) finished in time [[ChristmasRushed for that year's Christmas season]] as well as [[MilestoneCelebration be released before year's end to qualify as the 15th anniversary title]]. And then if that wasn't enough, the development team was split so that a new team could work on [[VideoGame/SonicAndTheSecretRings a new Sonic game for the Wii console]], the result of Sega discovering that a Wii version of the game (which was in development along with the [=PS3=] and 360 versions) was unfeasible due to the Wii's technical limitations. The fact that they had to develop two remaining console versions of the game at the same time during the short development process did not help matters.
** ''VideoGame/SonicHeroes'' was meant to be Xbox and [=GameCube=] only from the beginning, but midway through production, Sony apparantly gave Sega a deal to port to UsefulNotes/PlayStation2 or be denied any favors from the company forever. Sonic Team's inexperience with the [=PS2=] engine, as well as eventually being ported onto the PC as well, ended in a highly laggy, even ''boring'' (un)finished product.
** From the segments of information given about its hectic development, ''VideoGame/SonicBoom: Rise of Lyric'' ended up being subject to this. Developer videos and interviews have indicated that the game -- running on the [=CryEngine=] 3 engine -- was originally intended to be developed for Xbox and [=PlayStation=] platforms; however, the final game was released as a Wii U exclusive -- a platform that [=CryEngine=] 3 was not officially supported for. With ''Sonic Boom: Rise of Lyric'' announced as the third and final game in Sega's Nintendo console-exclusive Sonic partnership and the game reportedly going gold in July, the general consensus of what presumably happened behind-the-scenes was that Sega ended up rushing the game's development so they could release the game [[ChristmasRushed in time for the Christmas season]] and so they could quickly finish the Nintendo-exclusive Sonic partnership (as the first two games of the deal sold poorly). Not helping matters was [=CryEngine=] 3 not able to handle the game that they planned to make (a action-adventure game that supported two player co-op...mind you, [=CryEngine=] 3 was originally designed for first-person shooters), with one of the game's developer stating that the team "was fighting against the engine the entire time". And if that wasn't enough, a large chunk of the team left in July either voluntarily or just being let go. As a result, the final game had [[ObviousBeta a whole manner of glitches]] and visuals that left a lot to be desired -- a stark contrast to [[NeverTrustATrailer the early footage released for the game]], which showcased impressive visuals. It also didn't help that Sega [[NotScreenedForCritics enforced a review embargo]] to prevent official reviewers from telling the public about the mess the game was in, [[StreisandEffect not that it did any good once the game was launched]].
* {{Vaporware}}:
** ''Sonic X-Treme'' for the Saturn had a ''serious'' case of TroubledProduction before being cancelled. Gamers gradually uncovered its story and prototypes as the years passed.
** ''[=SegaSonic=] Bros.'' is an arcade puzzle game from 1992 that was quietly cancelled and became completely unknown to all but a handful of people for decades until fans dug up the rom in 2016.
* WhatCouldHaveBeen: Sonic went through several character designs before he was settled on as a hedgehog, including a fox, a dog, a rabbit, an armadillo, and a UsefulNotes/TheodoreRoosevelt look-alike in pajamas. Also, his original name was "Mr. Needlemouse" (from a literal translation of the Japanese word for hedgehog, harinezumi). The armadillo idea would later become Mighty the Armadillo, and the rabbit idea is the basis for [[VideoGame/{{Ristar}} another Sega game]] (but with a star instead of a rabbit). Of course, we all know who the Roosevelt man turned out to become. Also, the "Roosevelt" concept was attached to an idea of the hero being some type of "dream warrior" that fought nightmare creatures, likely as a counter to ''VideoGame/SuperMarioBros2.'' This idea obviously ended up getting reworked over the decade and turned into ''NightsIntoDreams''.
** Oh, and he was also gonna have a {{cute little fang|s}} sticking out.
** Robotnik's original design was actually intended as the design for the hero, until a change in direction. His concept was actually Theodore Roosevelt in pajamas.
** At one point in development, he was much larger and not the main antagonist.
** Sonic could have had a human love interest named Madonna.
** Sonic the Hedgehog 2 was ''intended'' to involve TimeTravel with a Good Future and BadFuture possible but the limitations of the Genesis cartridges at the time of development in 1991 prevented this. About Six months later ''SonicCD'' started development with the concepts intact and was released in 1993.
** Sonic 3 was intended to have both Tails and Knuckles as playable characters but, after being rushed for time, only Tails was left in the game planning. You can play as Knuckles when the [=S3=] cartridge is locked onto the [=S&K=] cartridge, however.
** Sonic & Knuckles and Sonic 3 w/ Lock On Technology were intended to be a single large game, code named Project Blue Red in alpha and beta stages, Sega realized that the cost of producing this one game (which would need to be larger then their own self-set system cartridge limits allowed) would out weight the cost of splitting it down and making two games which could be linked together.
** Tails was originally planned to be a {{Tanuki}}, but this apparently caused confusion due to the {{Main/Mario}} franchise already having the Tanooki Suit, so he was made a fox instead.
** ''WesternAnimation/SonicSatAM'' characters Sally Acorn and Bunnie Rabbot were planned to appear in multiple early projects (including early concepts for ''Sonic Xtreme''), though ultimately have only a brief cameo in ''VideoGame/SonicTheHedgehogSpinball'' to show for it.
** According to WordOfGod, Pefect Chaos's redesign in ''VideoGame/SonicGenerations'' was what they orignally intended for him to look like, but due to technological limitations at the time, it wasn't possible.
* There are exactly three games in the entire franchise where Sonic does not appear at all, not even as a cameo; ''VideoGame/DoctorRobotniksMeanBeanMachine'', ''VideoGame/TailsSkyPatrol'' and ''Tails and the Music Maker''.
** Likewise, Eggman has had the honor of either starring or cameoing in almost ''every single game in the franchise'', with the exceptions of ''VideoGame/TailsAdventure'', ''VideoGame/TailsSkyPatrol'', ''Tails And the Music Maker'' and ''VideoGame/SonicAndTheBlackKnight''.
** Like Eggman, Tails almost always has either a starring role or a cameo. Not counting games before his debut, he's only been absent from ''VideoGame/SonicLabyrinth'', ''VideoGame/SegaSonicTheHedgehog'', ''VideoGame/SonicBlast'', and ''VideoGame/DoctorRobotniksMeanBeanMachine''.
* Both Metal Sonic and his earlier version, Silver Sonic, can be seen in tubes in the Final Egg section of the Mystic Ruins in ''Sonic Adventure''.
* Want to know which version of the original ''VideoGame/SonicTheHedgehog'' you're playing? Check out the clouds in Green Hill Zone. In the Japanese versions, they scroll, but in the U.S. versions, they're static.
* Also from the [[VideoGame/SonicTheHedgehog original game]], there was originally supposed to be a sound test menu with an animated band "playing" the music while Sonic partakes in some breakdancing. It was nixed so the game could meet deadlines, and its space was replaced with the famous "SAY-GUUUUH!" choir heard at the end of Sega's Japanese adverts for the [[VanityPlate company logo]].
** Furthermore, the synthesis player of the band, Vector the Crocodile, would go on to become a supporting player in the series.
* Yuji Naka reportedly added the seventh emerald and Super Sonic to ''Sonic 2'' as a ShoutOut to ''DragonBallZ''. To make it even more obvious, in ''Sonic 3'', Super Sonic had green eyes.
** Also introduced in Sonic 2, the Death Egg was a ShoutOut to the Death Star from StarWars. Supposedly this was to balance out the Japanese fanservice with some American fanservice.
* The giant skeleton platform seen in [[VideoGame/SonicHeroes Mystic Mansion]] resembles the character select screen of ''VideoGame/GoldenAxe II''.
* There's an infamous "bug" in the original Sonic Genesis game where, if you land on a group of spikes after being hit without wearing a shield and without landing on the ground first, you will die regardless of the fact that you're supposed to have MercyInvincibility, at that point. "Bug", because until recently [[http://info.sonicretro.org/Spike_damage_behavior it was thought to be a bug, and not a preprogrammed behavior]]. Fortunately, all sequels and future releases of the game eliminate this "bug".
* Almost all badniks in ''VideoGame/SonicCD'' are based on bugs. The exception is Bigbom, a GiantMook version of Sonic 1's Bomb badnik.
* Sonic characters do not have toes. However, in the cartoons, they do. And if ''[[VideoGame/SegaSuperstars Sonic & All-Stars Racing Transformed]]'' is anything to go by, they seem to have toe bones despite not having toes.
* Amy was originally brown and called "Rosy".
[[/folder]]

[[folder: Animation]]
* ScrewedByTheNetwork: ABC put ''[[WesternAnimation/SonicSatAM SatAM]]'' up against ''PowerRangers''. The results were not pretty. Also, since this was the time when ABC affiliates started airing Saturday Morning ''Newscasts'', some markets never even saw the show first-run.
* WordOfGod: The answers to questions about the series-ending cliffhanger to ''[=SatAM=]'' were eventually discovered in interviews with the writing staff, including some plot threads which were supposed to continue from this point, such as Snively's HeelFaceTurn, Robotnik becoming Naugus' Right Hand Man as the latter became the series' BigBad, the introduction of Knuckles, and increased prominence for Tails.
[[/folder]]
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