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The Sonic the Hedgehog series has a large fanbase with a rich history dating back to the 1990s. Naturally, throughout the years many fan ideas have popped up and become commonplace in the fandom. Quite a large amount of fanon is are to mixing adaptations (most prominently the Archie comics) with game canon.


  • While Sonic games aren't particularly known for having great continuity, one persistent fan theory would make Shadow, the series' resident Sonic clone, literally a copy of (Super) Sonic, despite having been genetically engineered fifty years before the series began. In Sonic & Knuckles, Sonic faces off against... well, Knuckles in the Hidden Palace Zone, a secret holding place for the Master Emerald. In the background of the battle is a mural that depicts a glowing, hedgehog-shaped thing flying and fighting a giant robot over an Emerald in what is Foreshadowing for the last level, in fact a prophecy created thousands of years earlier by the ancient Echidna civilization. Later in Sonic Battle, reading the diary of Professor Gerald, Shadow's creator, shows that the man has spent a great deal of time researching the very same Echidnas that made the above mural. This is insignificant on its own, until one considers that Shadow resembled Super Sonic much more than he resembles Sonic; both hover above the ground in place of running, both have tussled, unkempt-looking spines, both have red eyes, both are immortal (though in different ways), and both possess extraordinary control over the Chaos Emeralds. Although the implications of Sonic being a warrior of prophecy and Shadow being a copy of him via that prophecy could easily become one of the deepest aspects of the entire plot, it unfortunately doesn't seem like it will be capitalized on.
    • Another version of this theory is that Sonic was born the original Ultimate Lifeform while Shadow was just Gerald's attempt.
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    • Other suggestions based on the above are that Professor Gerald was not trying to copy history; rather he believed the mural was indeed of a warrior of prophecy and in his arrogance thought he could fulfil the prophecy, which was why he created Shadow in the image of Super Sonic, and a hedgehog. Justified in that Gerald wasn't the sanest of individuals even before he went crazy - and he did originally want Shadow to be a protector for Earth.
    • While the Ancient Echidnas might not know what it is, Gerald would understand that is a robot in the mural. He might have assumed it was one of GUN's robots that Super Sonic fights.
  • Everybody knows Sonic's hydrophobic... except he isn't; he has a normal fear of drowning considering he can't swim. Sonic's "hydrophobia" is only shown in one episode of Sonic Underground, has been expanded to a few episodes of Sonic X where he wouldn't even go to the seaside when he had a choice (while quite a few SegaSonic sources even say he loves the seaside), and popped up in Sonic Boom. To be fair, after Labyrinth Zone, we wouldn't be surprised if it made him hydrophobic.
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  • Sonic's love of hot-dogs originated in Sonic the Comic (with him liking vegetarian hot-dogs, but preferring bean burgers), became emphasised in Adventures of Sonic the Hedgehog (with him loving chili dogs), and became canon in the Japanese manual to a Sonic Advance game. It was later shown off in-game in Sonic and the Black Knight.
  • Thanks to Sonic and the Black Knight having Shadow as Lancelot and Silver as Galahad, many fans considered the similarities between the two (certain abilities, personality traits, species and CHEST HAIR) and the fact that Shadow is immortal while Silver is from the future, and decided that Shadow is who Sonic Team has in mind as Silver's eventual father. Other evidence cited includes: A major point made is that the Round Table had lots of good, strong and famous knights, and Silver, not being a part of the story itself, could have been any one of them, but Sonic Team chose Galahad, son of Lancelot and said to be the most righteous knight of all. And they get a special winning animation in the Sochi Olympic Games too, which is intended for characters with some kind of relationship. There's a lot of father-son feeling in theirs, with Shadow looking sideways at Silver, and Silver trying to copy Shadow and look tough, when most of his winning poses have him floating around like a kid. Silver is an expy of Trunks and Shadow is often compared with Vegeta due to being The Rival of Sonic, who were father and son.
    • Though the most common theory was that Silver is Shadow's son (often with Amy) or descendant, the second most common theory is that he's Sonic's and Amy's Kid from the Future.
  • One relatively decent self-insert character in Sonic Sat AM fanfic (archived here), Bookshire Draftwood the elderly raccoon doctor, grew so popular and filled such an obvious hole in the cast that he actually became part of fanon. Archie Comics subsequently tried to make their own doctor character, Dr. Quack, but he was considerably less sympathetic and endearing and thus wasn't so well-received by the fanbase.
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  • The game Shadow the Hedgehog gave the titular character the ability to carry and use weapons, usually guns of one type or another. Some fans had already decided that, because (in canon) someone very important to him was shot, Shadow hated guns and would never use them. To be fair, reasons for this assumption also included his rather pronounced superiority complex and the fact that he could throw Chaos Spears around with his mind, thus rendering common ballistic projectiles somewhat redundant.
  • G-Merl's name (alternatively G-mel or Gemerl) is fanon. Sonic Advance 3 and Word of God implies that he's really Emerl from Sonic Battle. Also in Sonic Unleashed, Eggman's robot sidekick (named Orbot in Colors) is given the fanon name Ergo, because he says "Ergo" a lot.
  • There was a theory going around for a while that the Babylonians built Emerl, due to the text calling the awakened Gizoid a god at one point, and the legend stating that Babylon was destroyed by an angry god for their hubris. Naturally, Chronicles laid this one to rest.
  • Sonic the Hedgehog (2006) created a bit of a Continuity Snarl with Ensemble Dark Horse Blaze the Cat; in Sonic Rush (her introduction) she was supposedly from another universe, while in 2006, she was from the future. However, in the end of 2006, she was sealed in another dimension. While 2006 ended with a Reset Button, fans attempted to reconcile the two plot lines by stating that the dimension Blaze sealed herself in was the one from Rush. Rush Adventure, which was released after '06, josses this theory, as it's stated that Blaze belongs to a royal family that has existed in that dimension for generations. According to Iizuka at Summer Boom 2012, Blaze is indeed from the Sol Dimension (as seen in Rush), although that doesn't quite explain why she's in Crisis City in Generations with the implications that she remembers being at Crisis City (unless you want to Hand Wave it as a Mythology Gag of sorts).
  • A very common concept in fan fiction is that only certain people, usually called "Chaos Adepts," can use the Emeralds and their powers. Usually, they also can't be human. In canon, however, anyone who has actually tried has been shown to harness the power of the Chaos Emeralds, with about two-thirds of the main cast using them at least once. The closest this comes to canon is Shadow and Knuckles, who have a few unique powers due to being genetically engineered for them and having a connection to the Master Emerald, respectively; and Omega once implying that Sonic, Tails, and Knuckles have similar abilities to Shadow.
  • Related is the above idea is that Tails can't use them, despite Word of God stating that the only reason he doesn't is because he's young and inexperienced; that he's used them since then; and Omega, as mentioned, referring to Sonic, Tails, and Knuckles as "Shadow-like."
  • Almost any time someone draws (or writes) Amy as a teenager or adult, she's depicted with long quills (or outright hair) that go past her shoulders. The main exceptions are Sonic the Comic Amy and Sonic Boom Amy, who keep their bob haircut.
  • Besides shippers, Maria and Shadow's relationship is usually presented as a sibling one.
  • Bean and Bark as villains is this. Their official bios don't imply they're villainous at all and it's implied they're friends of Sonic in the official backstory to Sonic the Fighters. However Bean's mischievous nature, combined with his bomb usage, and Bark's imposing design and mean-looking expression made fans believe they were. This isn't helped by the bios being Japanese-only. Sometimes they are an outright Terrible Trio with Fang. It was eventually made Ascended Fanon in Archie Comics' Sonic the Hedgehog and Sonic Generations.
  • The whereabouts of most of the characters parents are never discussed and most characters live on their own despite being Kid Heroes. Fans have come up with common explanations, with most characters conveniently being orphans:
    • Tails is assumed to be an orphan. Alternative, he was abandoned by his parents for having two tails (this takes some inspiration from AoStH).
    • Sonic is typically seen as either having just run away from home to be by himself (this comes from an old backstory from Sonic the Hedgehog Technical Files that Sonic used to live on Christmas Island until he became bored and left) or being an orphan as well.
    • Amy canonically lives by herself according to various titles. Fans often either have her as living with her parents or have her parents be an important presence in her life. This is in order to emphasise her "normality" compared to everyone else. Amy usually gets her pelt colour from her mother. Some fans have Amy being adopted by humans, which explains her unusual name. The alternative is that Amy is an orphan, explaining why she lives alone.
    • Vanilla is Cream's single mother, however Cream's dad is never referenced. Thus most fans pin him as dead, with a less common take being that he abandoned Cream and Vanilla.
    • Knuckles is the last echidna alive but it's never specified what happened to his parents. It's generally assumed they were killed somehow. A variation that isn't incompatible is that Knuckles was born already alone, as echidnas hatch from eggs and Knuckles doesn't remember his parents.
  • On the Sonic/Amy shipping side of the fanbase, fan-sons will usually be given a speed-related name, like "Dash" or "Flash", while daughters have more typical names. If the children aren't either blue or pink, they will have purple fur.
  • The theory that Shadow's memories of Maria are fake and that he never met her. This was an idea that was toyed around with, but the games later went with Shadow's memories being true. In Sonic X, however, it's implied that Shadow's memories are false and that he never even met Maria (for example, his view on her death and the view given by her killer are different).
  • Though not the most common fanon, many fans believe Amy's full name to be "Amelia Rose". In canon, it's just "Amy Rose". One game showed that her full name is "Amy Rose the Hedgehog", but that hasn't appeared elsewhere and usually "the [x]" is treated as a title.
  • There is no official game-canon term for Funny Animal characters. Terms have been thrown around like "anthros", "fauna", or just "animals", but by far the most common one is "mobian". It's used even by those who acknowledge that games take place on Earth. The term comes from old westernized canon and adaptations where Sonic lived on a planet called "Mobius" and all anthropomorphic animals were "mobians". Sega has vetoed all references to "Mobius" with the cancellation of the Archie's comics, meaning the species is highly unlikely to be named "mobian" in the games.
  • The fandom has been very slow on the intake that the games don't take place on a planet called "Mobius" that is populated by Funny Animals. They take place on a planet that is officially either "Earth" or "Sonic's Planet". Said planet prominently features humans alongside talking animals. In fanworks, you'll typically see Sonic's planet be referred to as "Mobius" (even in ones that otherwise follow game canon). In order to make Sonic's world sound more fantastic, it's named "Mobius" rather than just "Earth". A large reason for this confusion is due to the popularity of the Archie Comics' Sonic the Hedgehog comic, which, prior to the Continuity Reboot, did take place on Mobius. Many adaptations such as Sonic X and Sonic Boom also have Sonic living on a World of Funny Animals, which strengthens the belief.
  • The Sonic Boom incarnations of the characters as older than their mainstream versions. Fans aren't concrete on Sonic and Knuckles' ages, however Amy is seen as a teenager and Tails is seen as being at least ten years old. This is due to their more mature looking designs and older seeming personalities. Word of God is that they're the same age as their normal incarnations (ie, Amy is twelve and Tails is eight).
  • The "classic" games taking place when the characters were younger. This is due to the timeline placement of the games, the chubbier and kiddier look of Sonic and Tails, and the fact Amy aged up from eight to twelve. Despite that, Sonic was canonically a teenager in the pre-Adventure games and he was actually aged down from sixteen to fifteen for Adventure. In Sonic Generations the "classic" characters are confirmed to be younger versions of the characters, however Sonic Forces retconned them into being from a separate dimension.
  • Sonic is sixteen as of Sonic Generations. This also explains the deeper voice of Sonic's post-Colors English voice actor. Sega, however, treats the game as an Ageless Birthday Episode and thus Sonic is still fifteen.
  • Amy using "Sonikku" as an Affectionate Nickname is near-omnipresent in fan works. This comes from the Japanese pronounciation of Sonic's name.
  • A number of fans believe that Sonic is a nickname and his real name is "Maurice", which he hates. This is due to the Archie comic having Sonic's middle name as Maurice prior to the Truer to the Text reboot. His first name was supposed to be "Olgilvie", however that was never written into the comics. Other Archie comic writers have ignored that as his name and treat "Sonic" as his name.
  • According to fans, Maria Robotnik died in the 1950s or early 1960s. This is despite the games having no stated time period. They don't look very futuristic, so fans assume they take place contemporary with their releases. Maria's clothes and the general atmosphere of the flashbacks seems to allude to the mid-1900s as well. If we're going by Sonic X, however, Maria actually died in the 21st century (Gerald's diary is dated to "20XX").
  • Maria Robotnik was a Child Prodigy. This is due to her being from a family of super-geniuses, so fans believe it runs in the family.
  • There's a belief that Maria was a bit of a trouble-maker due to being the only child on ARK, with her sweetness being somewhat deliberate.
  • A number of fans believe that Tails is really a girl who is mistaken for a boy or passing for a boy. This is due to people mistaking him for a girl (including some translations) and the belief that he was conceived as female. An alternative take on the theory is that he's a trans boy. These fanons are rarely taken too seriously, however it also led to the fanon that Tails gets mistaken for a girl a lot in-universe.
  • Both fans of Amy and people who hate her often exaggerate her post-flanderization love towards Sonic to the point where she's a yandere.
  • It's common for Sonic to call Amy "Ames" as a pet name in Sonamy fics or fics where they both have a friendly relationship.
    • It's also common in Shadamy fics for Shadow to call Amy "Rose".
  • Sonic the Comic:
    • Amy and her friend Tekno as a Battle Couple. This is due to to their Romantic Two-Girl Friendship combined with the fact Amy's crush on Sonic is near-nonexistent in the comic. This is Ascended Fanon as of a Sonic the Comic – Online! comic written by one of the original comic's writers.
    • Super Sonic is usually referred to by the Fan Nickname of "Fleetway". Fleetway published the comic but many mistake it for Super Sonic's name.
    • By the end of Sonic the Comic, everyone being older than their game canon ages. The comic keeps their ages intentionally vague; however, there are implications that Sonic and Knuckles are at least eighteen and Amy is never treated like an eight year old. It's generally assumed that Amy is in her mid-to-late teens, Tails is nearing teenagehood, and the rest are in their late teens or early twenties.
  • Archie Comics' Sonic the Hedgehog:
    • A fan artist depicted Prince Elias as having a ponytail in erotic art of him, prettying him up a bit. Now it's rather easy to find fanart of Prince Elias as having a ponytail, which has led to some folk who are fans of the comic continuity without reading the comic itself (gushing about shows you don't watch?) finding themselves surprised when official art "cuts off" Elias' ponytail.
    • Fiona Fox having peach-ish-colored belly fur is a related fanon.
  • Humans and Funny Animal characters live separately for the most part. This is used to explain the lack of animal NPCs in games and explain why Forces has no humans. Word of God explains it as Forces taking place on a World of Funny Animals, but this isn't shown in-game so fans have made up theories about where the humans are.
  • The default wolf Avatar from Sonic Forces who is used in most of the game's promotional material has been nicknamed "Gadget the Wolf" by the fandom despite only ever being called "buddy" or "rookie" in-game. He is universally used in fanart to portray the Avatar consistently, instead of having a different appearance every time.
  • Sonic's aversion to romance is more because he's scared of settling down and giving up his free lifestyle than an actual lack of interest in relationships.
  • Tails hates being called "Miles". This fanon likely originates from Adventures of Sonic the Hedgehog. An alternate, though not incompatible, fanon is that Tails will stop going by "Tails" when he's older.
  • It's pretty common to depict a teenage or adult Tails wearing goggles.
  • Tails is usually depicted and referred to in fan-works as either having red, orange, or yellow fur. According to Adventure 2 at least, his fur is "fox brown". Later games and media, however, do consistently refer to his color as yellow... Even if he actually looks reddish or orange.
  • Maria being twelve at the time of her death is cited as fact. In canon, she has a Vague Age.
  • Cream being either the result of a Teen Pregnancy or Vanilla having had her in her early twenties. Vanilla has a Vague Age, but she looks pretty young and 20-year old Vector likes her in Sonic X so fans typically pin her as in her late-20s at oldest.
  • There's a trend amongst fans to give the male characters clothes as they grow into adults. This can be anywhere from just shirts and jackets to the characters being Fully Dressed Cartoon Animals. Oftentimes this is done because it's an easy way to distinguish between their teen and adult designs, besides only height.
  • Shadow's favorite colour is often attributed as either black (because of his fur), blue (because of Maria's eyes and her preference for blue), or rock colorsnote  (obviously dark and edgy as Shadow).
  • The leader of G.U.N. is named Abraham. This comes from the Archie comics and has been adopted for game canon by fans as well.
  • The name of Shadow the Hedgehog's hypothetical daughter will usually be Maria, as a honor to the girl Shadow befriended and lost in his early days.
  • If Maria Robotnik was revived, she'd be a yellow-furred hedgehog. This is due to a commonplace fan design for "Maria the Hedgehog".
  • The idea of Shadow transforming into a human so he can love Maria the human, due to Bestiality Is Depraved, does exist,note  but is much, much rarer than the Maria the Hedgehog concept mentioned above.
  • Outside of fanfics who feature OC hedgehogs, hedgehogs are deemed a rare species of Funny Animal. They're not a dying species like echidnas, but they're not commonplace. This is used to explain why Sonic keeps on getting mistaken hedgehogs that he looks nothing like.
  • Some fans will make that Silver's circular Tron Lines on his gloves as part of his body. Some will also do the same with Blaze's red gem/bindi on her forehead.
  • Chaos, the water god-like being, will be used in place of God in some expressions in some fanworks, such as "Oh my Chaos!" Other gods, such as Light Gaia, may be used, but Chaos is rather the most common.
  • It's often mentioned in fan-works (especially Shadow/Maria or Sonic/Elise ones) that, while human/Funny Animal relationships are not illegal, but they are looked down upon by both species.
  • In fan-art depicting the characters as human, there are a few frequent elements: Tails will wear goggles, Sonic will have Shonen Hair, and Knuckles will either be a white Long-Haired Pretty Boy or he'll be black and have long dreadlocks.
  • Sonic Underground: Sonia and Manic don't have known eye colors. In fan-works, they're almost always given blue and brown eyes.
  • If there's the Jackal Squad, there must be other squads consisting of canines, such as a Fox or Wolf Squad.
  • Amy Rose will have a Flower Motif concerning roses (her last name, duh) and rose metaphors will be common in fanworks focused on Amy.
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