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2%% SOURCED EXAMPLES ONLY
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4%% If you can't name a specific fanwork, it's not an example, and it will be removed.
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6%% Also, you can include external links, but please include a link to the wiki article for the fic in question as well, even if it doesn't have one yet.
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8%% Please alphabetize fan works by the title of the original work, not by the title of the fan work itself.
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10%% Image selected per Image Pickin' thread: https://tvtropes.org/pmwiki/posts.php?discussion=1540713983095996700
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13[[quoteright:350:[[Literature/HarryPotter https://static.tvtropes.org/pmwiki/pub/images/blaise_zabini_fanon_canon_1.png]]]]
14[[caption-width-right:400:No one got [[Literature/HarryPotterAndTheHalfBloodPrince Blaise Zabini]] right.[[note]]And that's not even getting into the ones where he's a girl...[[/note]]\
15[-Credits: [[https://www.deviantart.com/kayitea/art/Blaise-Zabini-25622632 kayitea,]] [[https://www.deviantart.com/shley77/art/commission-illustration-37332083 shley77,]] [[https://www.deviantart.com/woshibbdou/art/Blaise-Zabini-139486509 woshibbdou,]]\
16[[https://www.deviantart.com/vivienka/art/Blaise-Zabini-142732435 vivienka,]] [[https://www.deviantart.com/lili-paletskaya/art/Blaze-Zabini-153702741 lili-paletskaya,]] and [[https://www.deviantart.com/gangstersteph/art/Blaise-Zabini-15026581 gangstersteph.]]-]]]
17
18''[[MinorMajorCharacter "Who was the mother of Bob?"]]''
19
20The realm of fanfiction is an interesting place. Where canon may be scant with details, fans of a work can take up the task of filling in perceived holes in a story. This may include creating their [[OcStandIn own]] [[OriginalCharacter characters]] to flesh out a character's lineage or [[FanWank coming up with reasons]] why certain ones behave as they do. After all, what if the story never bothers to tell us who the parents of the protagonist were? Or the deal behind that guy with the cool name who's [[TheGhost always mentioned but never shown]]? If one of these fan works becomes popular enough, it will spread across the community and its ideas [[WordOfDante become an accepted fact]] of the show/book/movie's lore. Or mocked, if the fic is lacking in quality. Either way, these questions raised by the canonical work which the fans latched onto haven't been answered and never will be, so fans are free to continue playing with them... [[TemptingFate right]]?
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22Outdated by Canon is when fan works (and the theories backing them) are {{Jossed}} by revelations or events in the canonical product; most often in regard to characterization. For example, a fanfic writer might decide that Bob's unseen mother is a RetiredBadass who instilled and promoted Bob's own thirst for adventure. This fanfic becomes popular and soon the entire fandom chooses this as their {{fanon}}, with other fanfics following suit. Various stories are made about Bob's mom teaching him how to fight, or giving him hero advice, or even coming out of retirement to help Bob and his friends stop the BigBad. Then several installments later, when the creators of the canonical work finally take us to Bob's childhood home to meet his mom, it turns out she's [[MyBelovedSmother an overprotective woman]] who's terrified of even leaving her house. This leaves future fans who find these old fics wondering why the story they just stumbled upon has Bob's mom threatening to [[DidYouJustPunchOutCthulhu punch out an eldritch abomination]] instead of fainting at the sight of one.
23
24The earlier the fanwork was made in the life of the work that inspired it, the more likely it will be hit by this trope: after all, the beginning of a work is when the audience has the least understanding of the world they've been presented with, increasing the chance of early theories being jossed.
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26Also a specific form of CanonForeigner, OCStandIn, and potentially HilariousInHindsight. Some fans may invoke FanonDiscontinuity, especially if one specific character interpretation was popular with the community because that version was well-written or served as great [[{{Fanservice}} eye-candy.]] Often the result of an UnknownCharacter finally getting revealed.
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28This is only a trope applicable to fan works, as any licensed examples fall into the CanonDiscontinuity, CanonMarchesOn or WhatIf scenarios. Part of TimeMarchesOn. See also ResolvedNoodleIncident. Contrast AscendedFanon or IKnewIt, where the popular fanfic interpretation ends up being part of canon either because of its popularity with fans or because that was always the plan.
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30'''[[Administrivia/HowToWriteAnExample Examples Are Not General]]''': This page only covers specific fan works (of any type of medium), not general {{fanon}} that aged badly.
31
32'''Spoilers for the source material may be unmarked, as examples need to explain how the fan works are outdated. Read at your own risk.'''
33----
34!Examples: (Sorted by source material)
35[[index]]
36* ''OutdatedByCanon/DragonBallMultiverse''
37* ''OutdatedByCanon/MyLittlePonyFriendshipIsMagic''
38[[/index]]
39[[foldercontrol]]
40
41[[folder:Anime & Manga]]
42* In the ''Manga/{{Beastars}}'' fanfic ''Fanfic/{{Protector}}'', Pina is shown to have some degree of PTSD for being kidnapped at the end of the Murder Incident Solution Arc. [[spoiler:Chapter 182, released much after the fic was underway, reveals that Pina feels nothing of the sort, and has actually befriended his former kidnapper while he was in juvie.]]
43* ''Manga/ACertainScientificRailgun'': When Misaki Shokuhou was finally introduced after being hinted at, the fanfic ''Fanfic/MindsMemoriesAndMisfortune'' explored her encountering ''Literature/ACertainMagicalIndex'' protagonist Touma Kamijou because she learns that he's been in the company of her rival, ''Railgun'' protagonist Mikoto Misaka, and wanted to learn more about him. However later issues of the manga would reveal Misaki was already familiar with Touma and his abilities, and the ''Index'' novels would reveal that she met Touma a year before Mikoto ever did, and that Touma's present association with Mikoto was part of the reason why Misaki views Mikoto as a rival.
44* ''Anime/CodeGeass'': In ''Fanfic/OfMonstersAndMen'', Nunnally is blind and keeps her EyesAlwaysShut of her own free will. The anime later confirmed that she's only blind because her eyes can't open. Her vision itself is fine.
45* ''Franchise/DragonBall'':
46** The concept of another [[KillerRobot android]] was quite popular with some fanworks, with Android 21. In ''Fanfic/BringerOfDeath'', [[https://www.deviantart.com/bringerofdeathdbz/art/Concept-Android-21-331524473 Android 21]] is an energy-absorbing ''android'' Doctor Gero created ''just in case'' due to the story events, described as a giant man with it pronouns. ''Videogame/DragonBallFighterZ'' would introduce Android 21, a female bio-android made with the cells of every character lacking the energy absorption powers, including the EldritchAbomination Majin Buu. As such, she is a scientist that can shapeshift in a CuteMonsterGirl form with a love for sweets, and is directly based on the mother of Doctor Gero's son, being a WoobieDestroyerOfWorlds.
47** ''Webcomic/DragonBallZeroToyble'': Alongside taking elements of the movies and [[Anime/DragonBallZBardockTheFatherOfGoku The Father of Goku]] (Which as of this writing, is in [[BroadStrokes canon limbo]]), this ''doujinshi'' presents Raditz meeting Vegeta and Nappa after the destruction of Planet Vegeta and the death of his squad. [[Manga/JacoTheGalacticPatrolman Further material]] [[Anime/DragonBallSuperBroly released in the 2010s]] would show Raditz was a member of Vegeta's squad from day one, and they survived because Vegeta ignored Freeza's order. Nappa and Vegeta's reaction to Planet Vegeta's destruction likewise is outdated. In the doujinshi, they laughed about it very sadistically after hearing about it. In ''[[Anime/DragonBallSuperBroly Broly]]''? Nappa is visibly horrified while Vegeta is more indifferent about not being able to become the new king.
48* ''Manga/FullmetalAlchemist''
49** The 2004 fangame, ''VisualNovel/FullmetalAlchemistBluebirdsIllusion,'' has [[spoiler: Hoenhiem]] as the leader of the Homunculi. This was before it was revealed that [[spoiler: Hoenhiem and Father]] were two separate people. This game also has [[spoiler: Edward]] become Pride, since this was made long before it was revealed that [[spoiler: Selim Bradley was Pride]].
50* ''Anime/GirlsUndPanzer''
51** ''[[https://www.fanfiction.net/s/8835751/1/In-Strange-Waters In Strange Waters,]]'' which was written before the last two episodes of the anime aired, has the final match end differently, with Kuromorimine's flag tank being taken down after being exposed, instead of Miho defeating Maho in a tank duel. The fic also portrays Oarai's tank crews, apart from Anglerfish, as being significantly less competent than they became by the end of the anime.
52*** In said final match, we see Duck Team's [[TheAllegedCar Type 89]] get completely destroyed by Kuromorimine's arsenal in the final match, necessitating a replacement for the now tankless team. While the actual battle did feature the tank be taken down by KMM, the Type 89 was still repairable (much like the rest of the Oarai tanks) and was able to soldier on in to subsequent entries.
53** ''Fanfic/BoysUndSenshaDo''
54*** The fic seems to imply that the high school tankers' only way to continue tankery after high school is to enter the Self-Defense force and study under Shiho. Naturally, the film's showing university-level tankery teams and other tankery houses show that the Nishizumi school isn't the only choice.
55*** There's also Miho's decision to demote Momo from deputy commander after [[spoiler:her poor performance against Dalian while filling in for Miho during the latter's recovery]]. While reasonable, the decision eventually ends up being at odds with how in ''[[Anime/GirlsUndPanzerDasFinale Das Finale]]'', [[spoiler:Momo is made commander in an attempt to help her get into Yuzu and Anzu's university]].
56*** The fic has Miho fondly reminisce about her time in her middle school tankery team. ''Phase Erika'' shows that her time at the school was unpleasant, from feeling out of her depth in the tankery team to having to treat Maho as a commander first and a sister second.
57** ''Fanfic/AlwaysAdvancing''
58*** [[WrenchWench Nakajima]]'s first name was retconned from Satoko to Rera prior to ''Das Finale 3'' for unnamed reasons. As this fic was written around the time ''Das Finale 1'' and ''2'' was coming out, Nakajima's first name is still Satoko in the story.
59*** None of the [[Characters/GirlsUndPanzerDasFinale characters that make their first appearance in ''Das Finale'']] is acklowledged in this story. [[JustifiedTrope Justifiable]], as this is an AlternateUniverseFic where the timeline was reset before those characters interacted with the main characters, thus [[FridgeBrilliance would not have been able to recognize them]] even if AmnesiacResonance kicked in like many of the characters did.
60** ''[[https://www.fanfiction.net/s/13408199/1/Speedster-and-Spymaster-An-Unlikely-Love-Story Speedster and Spymaster: An Unlikely Love Story]]'' opens with Earl Grey, the former team commander of St. Gloriana, flying back to Japan from England where she was studying abroad after graduating STGGC. While spinoff mangas in this series are more often than not LooseCanon, this depiction is at odds with how ''Saga of Pravda'' sent her off by way of [[spoiler: having her go into an arranged marriage just before the events of the main series started, thus never going to a university of any sort]].
61* ''Franchise/LittleWitchAcademia'': ''[[https://www.fanfiction.net/s/9530815/1/Fireworks Fireworks]]'' was written back when the franchise only consisted of the [[Anime/LittleWitchAcademia2013 original short film]] and is one of the first fanfics ever made for the franchise, thus, it unsurprisingly contains several oddities, such as professors Ursula and Nelson being called Hidaka and Kaname respectively (as both were unnamed in the short film) and a different personality for Diana from canon, who is depicted in the fanfic as being far more silly and teasing towards Akko as opposed to the serious and aloof girl shown in the film's sequel, ''Anime/LittleWitchAcademiaTheEnchantedParade'' and the later [[Anime/LittleWitchAcademia2017 TV series]].
62* ''Manga/MyHeroAcademia'':
63** The name of the missing eldest Todoroki sibling was widely speculated, especially after theories emerged that he became the villain Dabi. ''Fanfic/KarmaInRetrograde'' ended up naming him Ryouta. The Pro Hero arc ended up settling on Toya.
64** One thing many fics tried addressing was Aizawa's past history of expelling students. Fics like ''FanFic/SleeperHitAU'', ''Fanfic/{{Coyote}}'' and ''[[https://www.fanfiction.net/s/13357189/1/The-Gatekeeper The Gatekeeper]]'' would {{deconstruct|edTrope}} the idea, either by [[WhatTheHellHero taking Aizawa to task for doing so]], or by examining the hypothetical ''fallout'' behind expelling so many students. Canon would reveal however that the "expulsion" was a glorified scare tactic. That while they would have expulsions on their records, any student Aizawa expelled he'd immediately re-enroll, with the idea it would convince them to improve themselves going forward. The entire class from the prior year is likewise revealed to still be attending UA as Class 2A now, and while some of them understandably don't like Aizawa, others like Mawata Fuwa are grateful to him for doing so.
65** In the ''WebAnimation/DeathBattle'' episode "Zuko VS Shoto Todoroki", the way the show's hosts, Wiz and Boomstick, describe the circumstances of Shoto's birth implies that Endeavor viewed his wife Rei as nothing more than a BreedingSlave on whom he exercised a MaritalRapeLicense. Although the purpose of their ArrangedMarriage was indeed [[SuperBreedingProgram to produce a child powerful enough to surpass All Might]], the idea that Rei was forced into having children against her will originated in {{Fanon}}, and later chapters of the manga would contradict this by revealing that Endeavor and Rei did truly love each other for much of their relationship, that Rei herself wanted to have many children so they could support each other, and that Endeavor only became abusive after Shoto, the youngest Todoroki child, was born.
66* ''Manga/{{Naruto}}'':
67** The Sasuke/Sakura {{doujinshi}} ''Hide and Seek'' has Sakura's mother looking very much like an older version of Sakura. The [[NonSerialMovie non-canonical]] movie ''Road to Ninja'' later revealed Mebuki's design (and Sakura actually gets her pink hair from ''her dad'').
68** ''Fanfic/ShirukaYo'' is the oldest ''Naruto'' fic on Website/FanFictionDotNet, dating back to 2001 (predating even the anime). It depicts Itachi having tried to strangle Sasuke during the Uchiha massacre. Not only is this off because it was later shown that Itachi didn't lay a finger on Sasuke, but it's also completely out-of-character for Itachi.
69** ''Fanfic/Team8'' started in 2006, so Itachi is intentionally written in the way he was first portrayed, as having killed his own clan merely for power (although Itachi's debut chapter in the fic came out after the manga chapter revealing the truth about him). This also ''might'' be a justified instance due to the AlternateUniverse nature of the fic.
70** Doujinshi like ''After the War'' which were made before the ending but were set in the aftermath of the Fourth Shinobi World War showed Tsunade still being the Hokage, when in {{Canon}} she stepped down immediately after it, passing the mantle to Kakashi.
71** ''[[https://www.fanfiction.net/s/4230784/1/Daddy-s-Little-Girl Daddy's Little Girl]]'' from 2008 is an example, and it also depicts Sasuke's daughter being named "Mikoto" after his mother rather than "Sarada."
72* ''Manga/OnePiece'':
73** ''Fanfic/CobysChoice'': One of the more humorous outcomes in the Marineford War is Ivankov accidently using his powers to turn [[spoiler:Admiral Kizaru]] [[GenderBender into a woman]], with the effects still present after the two year time-skip. Years later, the Egghead Island Arc in the manga would show Law being able to revert a similar transformation (this one caused by [[spoiler:Doc Q of the Blackbeard Pirates]] by using intense haki, which is likely that [[spoiler:Kizaru would be able to do]].
74** ''Fanfic/MarieDSuesseAndTheMysteryNewPirateAge'', while mostly faithful to canon at the time of its writing, was written before Trafalgar Law's character was explored in the Punk Hazard and Dressrosa arcs, so the writer mainly worked off of his relatively limited screentime in the Sabaody and Marineford arcs. As such, in the fic, Law's goal is to become Pirate King instead of [[spoiler:getting revenge on Doflamingo for murdering Corazon, Doflamingo's brother and the person who saved Law's life]].
75** ''Webcomic/ReturnToTheReverie'' attempted to give the Five Elders, who at the time of the writing were a bunch of unnamed {{Non Action Big Bad}}s, a case of AdaptationalBadass by having them be expert warriors with potent Haki and Devil Fruit powers as well as giving them names. Eventually they were given official names and decided to get their hands dirty, where it's shown that [[spoiler:they're [[PersonOfMassDestruction far more powerful than the comic shows them to be]], with at least one of them possessing Conqueror's Haki]].
76* ''Anime/PokemonTheSeries'':
77** ''Fanfic/TheStoryOfSilverKetchum'' was written between the releases of ''Red and Blue'' and ''Gold and Silver''. This leads to elements such as pre-evolutions and evolutions that don't exist, "Pikablu" (Marill) being an Electric/Normal type, and moves that aren't canonical.
78** ''Fanfic/SylviaTheSylveon'' was written after Sylveon was revealed as a new Fairy Type Eevee evolution but before its evolution method was known, meaning the author had to invent a means for Sylvia to evolve into a Sylveon; she had some scientists use an (unnamed) item. It later emerged that Sylveon's canonical evolution method requires an Eevee to have its affection raised to a high level while knowing a Fairy Type move. The author acknowledges this in her notes at the end of the story.
79* ''Anime/PuellaMagiMadokaMagica'':
80** ''FanFic/ResonanceDays'':
81*** One of the main characters is the newly-incarnated form of the witch Charlotte as a CuteMonsterGirl, whose original human form was never revealed (humanizations of her were ''very'' common in the fandom). This became outdated when ''The Rebellion Story'' introduced a canon human form Charlotte. Nagisa Momoe, who doesn't match up in the slightest with the version in ''Resonance Days'': the character is described as a tall, pink-haired girl who's somewhat older than Mami, while Nagisa is a short, white-haired TokenMiniMoe, and that's before you get into their personalities.
82*** The character of Reibey, an Incubator with a very distinct personality and design from Kyubey, was made when the spinoff ''Manga/PuellaMagiKazumiMagica'' was still ongoing, which featured a character named Juubey, shown to be quite different from Kyubey. This led to it being widely assumed in the fandom that there were lots of other Incubators running around, possibly being assigned to different cities or worlds. However, it was revealed very late in the manga's run that Juubey was ''not'' a normal Incubator, but rather an artificial being created by a magical girl from one of Kyubey's corpses, and Kyubey implicitly suggests that other Incubators having their own personalities is basically unheard-of. Other spinoffs have affirmed this, as even [[Manga/PuellaMagiTartMagica a story taking place in medieval France]] featured Kyubey, suggesting that his species operates on a HiveMind.
83*** [[Manga/PuellaMagiOrikoMagica Kirika's]] witch is named Margot, which was the common theory at the time, as the words "MARGOT GARDEN" appear in her barrier in the manga (the words apparently being an allusion to a Mary Cassatt painting, which the witch resembles). ''VideoGame/MagiaRecordPuellaMagiMadokaMagicaSideStory'' revealed it was actually Latria.
84** ''FanFic/StarsAbove'': As noted in the very last chapter, creators [=BHS=] and [=AshenDream=] knew that ''The Rebellion Story'', being already in the works, would outdate this. However, there were other things that they could not anticipate:
85*** The forms that the Demons took, based on the Nine Circles of Hell, were inspired from what their kind was called in Japanese (translated from "Majuu"). The original anime had yet to be dubbed when this story began, and when it was, they were dubbed Wraithes, a specific type of demon. And even in Japan, it still took a while longer after the fic was completed before Wraith Arc would get published to detail how they'd actually operate.
86*** With Kazumi Magica still ongoing at the time, Kazumi herself was declared dead in order not to conflict with any plans still in place for that. As it turned out, she was actually [[spoiler:a clone of someone named Michiru Kazusa, created using a Witch's heart along with Michiru's body]], dictating that she would still assume the name [[spoiler:Michiru]] in the story's past timeline.
87** ''[[https://www.fanfiction.net/s/10034329/1/Cheesecake Cheesecake]]'' was meant to deal with the girls' experiences in the Wraith-verse, two years before the ''Wraith Arc'' would be published in Japan and even longer before its chapters would be summarized on Puella Magi Wiki. It was reasonable then to assume that Nagisa would play a role in things, but in fact, she never appears canonically. (Then again, it was her Witch form, who even apologizes upon bearing her true form for deceiving her friends the whole time, that Mami introduced to the others in [[spoiler: Homura's reality]] during ''The Rebellion Story'', and she probably wouldn't have had to if [[spoiler: their real selves]] already knew her.)
88** ''Fanfic/AHistoryOfMagic'''s first chapter details what likely happened to Joan of Arc as a Puella Magi. Whatever the story uses is no longer true with the release of ''Manga/PuellaMagiTartMagica'', which reveals what ''actually'' happened to her.
89* ''Manga/{{Saki}}'':
90** While the version of Teru in ''Fanfic/SakiAfterStory'' clearly suffers from RonTheDeathEater (not only [[IHaveNoSon refusing to admit that Saki is her sister]], but [[NoHoldsBarredBeatdown beating up Saki]] [[DisproportionateRetribution after losing to her]]), it was written long before Chapter 128. In that chapter, which takes place just before the finals, Teru admits to Awai that Saki ''is'' her sister, and subsequent chapters imply that while the Miyanaga sisters still aren't on speaking terms, Teru doesn't hate Saki. In fact, Teru's character in the fic largely seems to be based off of her brief appearances in the first anime, which, in turn, was also aired when little was known about Teru.
91** In ''[[https://www.fanfiction.net/s/8668488/1/The-Saint-Is-Coming The Saint Is Coming,]]'' which was written in late 2012 (around the time the Side B semifinals were beginning), Rinkai gets humiliated in the finals, ending with only 10,000 points,[[note]]Since mahjong operates on a zero-sum scoring system, there are 400,000 points between the players- Kiyosumi has 200,000, Achiga has 130,000 and Shiraitodai has 60,000[[/note]] resulting in their coach being fired. Considering that Rinkai consistently held first place for almost the entire Side B semifinals, and as of this writing, is in first place in the finals, it's unlikely that they'll end up being humiliated so badly.
92** ''Fanfic/NecessaryToWin'' has Hisa come to Oarai in part because of her parents' divorce. In Chapter 241 of canon, it is revealed that Hisa has two moms, that she left the tournament where she'd competed against Mihoko because one of her mothers had been in an accident, and that the accident led to Hisa's mothers divorcing.
93* ''Manga/TigerAndBunny'': In ''Fanfic/{{Objective}}'', the last-resort of the heroes to stop a BrainwashedAndCrazy Kotetsu is to [[spoiler:have Kaede copy Bellisair's power and give a new Objective for Kotetsu]], which hits a snag when Sumo Thunder throws a car at Kotetsu and [[spoiler:Kaede]], leading to [[spoiler:Kotetsu to grab and rescue her, unintentionally making Kaede copy his power and forcing her to head back and copy Bellisair again before she could free her father from the brainwashing]]. Season 2 would reveal [[spoiler:that Kaede can only copy a NEXT power ''once'']].
94[[/folder]]
95
96[[folder:Comic Books]]
97* ''ComicBook/{{Superman}}'': Virtually any pre-2004 fanfiction featuring the original ComicBook/{{Supergirl}} (like ''Fanfic/HellsisterTrilogy'', ''Fanfic/KaraOfRokyn'', ''Fanfic/TheGoldenBoysLastTemptation'', ''Fanfic/TalesOfTheOtherverse''...) were alternate universe fics which presented the canon mainstream universe as a reality where Kara Zor-El did never and could never exist, assuming that DC would never bring the character back. ''ComicBook/TheSupergirlFromKrypton2004'' reintroduced Kara into the modern DCU, rendering completely unnecessary the use of parallel realities as an excuse for featuring the Superman's cousin.
98[[/folder]]
99
100[[folder:Crossovers]]
101* ''Fanfic/InfinityTrainBlossomingTrail'' (''WesternAnimation/InfinityTrain'', ''Anime/PokemonTheSeries'') has Professor Cerise oblivious to his daughter's dislike for Pokémon and how he focuses more on his research and on Ash and Goh. This was written before Episode 31 revealed that he actually was aware of his daughter's insecurities and encouraged her to try something new. In fact, Chloe would eventually begin a character arc about learning to love Pokémon her own way, to the point where Professor Cerise thinks she isn't focusing as much on him any more.
102* ''Fanfic/LordOfTheCastle'' (''WesternAnimation/Castlevania2017'', ''WesternAnimation/JusticeLeague''[[note]]Though it takes major inspiration from the [[{{Franchise/Castlevania}} both]] [[Creator/DCComics franchises]] as a whole, having villains from the former like [[OurWerewolvesAreDifferent Cornell]] and [[SinisterMinister Shaft]] and heroes from the latter like [[Characters/{{Hellblazer}} John Constantine]] and [[{{ComicBook/Mister Terrific}} Mister Terrific]].[[/note]]): Because this story was published at the release of Season 2, it became outdated in many ways following Seasons 3 and 4;
103** Alucard elects to sink Castlevania to the bottom of the ocean until {{ComicBook/Aquaman}} and his son are sent there by [[CainAndAbel Orm]] (as per [[Recap/JusticeLeagueS1E6And7TheEnemyBelow The Enemy Below]]), and him saving them is what introduces him to the Justice League. In the actual series, [[spoiler: Alucard keeps Castlevania where it was teleported by Sypha, above the Belmont Hold]].
104** Carmilla and the Styrian Council are all [[spoiler:[[SparedByTheAdaptation alive]] and united]], whereas in Season 4, [[spoiler: Carmilla and Lenore are both dead, and Striga and Morana [[ScrewThisImOuttaHere abandon her]]]].
105** One of the biggest, however, involves [[TheGrimReaper Death]] in his alignment, fate, and characterization.
106*** In the fanfic, [[spoiler: his characterization is based on his game counterpart, where he is Dracula's [[UndyingLoyalty loyal]] [[TheDragon right-hand man]]. While he does pledge his services to Alucard upon Dracula's death, his loyalty to the dhampyr's father is ultimately stronger. When Alucard is [[HumanityEnsues turned 100% human]] by Mr. Mxyzptlk, some of Dracula's servants (including the aforementioned Cornell and Shaft) escape from Hell with Death using LoopholeAbuse to keep them on Earth instead of sending them back, and works alongside them in an attempt to revive Dracula. Death currently remains at large and [[SparedByTheAdaptation very much alive]]. Personality-wise, he keeps the polite, soft-spoken demeanor of his game counterpart, and [[AffablyEvil even has fond memories of working alongside Dracula in raising a young Alucard]]]].
107*** Compared to that, [[spoiler: Death in the animation is the GreaterScopeVillain, and an OmnicidalManiac who feeds on death itself. While he does want to revive Dracula, it's not out of any kind of loyalty or admiration; he does so with the intent of deliberately [[CameBackWrong botching]] Dracula's resurrection to drive him insane and kill all life on Earth so he will never go hungry again. He is also killed by Trevor Belmont in the penultimate episode of the series. Finally, in contrast to the fanfic making Death a polite, soft-spoken antagonist, the last season has Death being SophisticatedAsHell, either talking in an upper-class voice or swearing like a sailor with a good amount of F-bombs and looks down on pretty much everybody else like gum stuck to his non-existent shoe]].
108* ''Fanfic/{{Paradoxus}}'' (''WesternAnimation/WinxClub'', ''VideoGame/WorldOfWarcraft''): It has been in the works well before the seventh season of ''WesternAnimation/WinxClub'' was even rumored and before the "Shadowlands" expansion of ''VideoGame/WorldOfWarcraft'' was released. As a result, there are quite the things ''Paradoxus'' doesn't include from its canonical sources.
109** On the ''Winx Club'' side:
110*** None of the fairy (and witch) transformations above the Bloomix exist in this fanon continuity. Partially in an attempt of preserving the coherence (the Dragon's Flame is the magic that created the universe, therefore it's ludicrous to think the transformation it spawns isn't the most powerful) since the sixth season also introduced the Mythix. Instead, the next transformation in ''Paradoxus'' is called Etherix and is the result of training the Bloomix to its peak, a feat that often takes years to achieve.
111*** The fairy animals and the time-traveling Memory Stones from season seven are not a thing. This leaves the characters of ''Paradoxus'' with only one magical way of getting to the past: asking the bronze dragonflights, which is not an option. That's why Trisha and Tecna invent scientific time travel.
112*** Icy's retconned backstory about having a sister and being the LastOfHerKind is not included. Instead, she's the older sister of Darcy and Stormy and her reason for pursuing the Dragon's Flame is first to honor her ancestors and then for vengeance against Bloom.
113*** Valtor's return in season eighth. Here he was KilledOffForReal as the third season hinted. He hasn't and will never come back to pester the Winx's daughters.
114** On the ''World of Warcraft'' side:
115*** The Realm of Death introduced in the "Shadowlands" expansion doesn't exist in this fanfic. Thus, no Eternal Ones, no Elune's sister, no Maw, and definitely no First Ones.
116*** Zoval, the Jailer, is not the entity behind all of Azeroth's misfortunes. Instead, the Burning Legion's invasion, the creation of the Scourge, and the Cataclysm are all the consequences of the characters' free will and ambitions. The Jailer did make a deal with Sylvanas Windrunner, but that's it.
117*** For that matter, Arthas Menethil is not a JerkassWithAHeartOfGold and, while still the UnwittingPawn (at the beginning) of the Lich King, his corruption was due to CharacterDevelopment and not because he was mind-controlled. His actions after fusing with Ner'zhul were very much his own. No one forced him to burn the Sun Well or to ravage his own kingdom.
118* ''[[https://www.fanfiction.net/s/13917838/1/SPBRR-Fusion SPBRR Fusion]]'' by Creator/NanTheKeybladeMaster has the ''Manga/FullmetalAlchemist'' characters leaving the Galactic Federation in disgust over their corruption with Promised Day being about Samus and her team fighting back against the corruption and [[https://www.fanfiction.net/s/14088996/1/Super-RWBY-3D-Land Super RWBY 3D Land]] has Samus revealing a Neo Galactic Federation was created to protect the galaxy.. A month after Fusion was released, [[https://old.reddit.com/r/Metroid/comments/p8kx25/a_mistranslation_from_fusion_has_finally_exploded/ It turns out that the Federation in the game was a rogue faction in the Galactic Federation's military and the main Federation itself still holds Samus in high regard]], which ''VideoGame/MetroidDread'' confirmed. Likewise, the ending depicts an X Parasite evolving into a new SA-X and heading to ZDR, only for ''VideoGame/MetroidDread'' to reveal that the brief glimpse of the SA-X in the trailer is all there is of it in the game, appearing as a recap of ''VideoGame/MetroidFusion''. Likewise, [[https://www.fanfiction.net/s/14129184/1/RWBY-and-the-Seven-Sirens RWBY and the Seven Sirens]] states that ''VideoGame/{{Cuphead}}'' happened first, followed by ''WesternAnimation/TheCupheadShow''. [[spoiler:The ending of the series finale of ''The Cuphead Show'' has it be the other way around.]]
119[[/folder]]
120
121[[folder:Film -- Animated]]
122* ''WesternAnimation/{{Frozen|2013}}'':
123** ''Fanfic/CafeLiegeois'' depicts Anna as a LethalChef, riffing off her CuteClumsyGirl personality. ''ComicBook/FrozenBreakingBoundaries'' shows that Anna can at least bake.
124** ''Fanfic/TheRoyalReunion'' named Agnarr and Iduna "Gaspar" and "Malin". At the time, their names were simply fan-speculation until later tie-in material confirmed them.
125** ''Fanfic/TheQueenOfHearts'' uses "Jonas" and "Matilda" for Agnarr and Iduna, as well as "Thomas" and "Primrose" for Fredric and Arianna of ''WesternAnimation/{{Tangled}}'' (whose names were revealed in ''WesternAnimation/TangledTheSeries'').
126** ''Fanfic/TheAlphabetStory'' revolves around Elsa's SecretRelationship with a woman and the {{gayngst}} caused by DeliberateValuesDissonance. Later semi-canonical books show that Arendelle is accepting of LGBTQ people and that same-gender marriage is legal. It also goes against the ending to ''Frozen II'' by depicting Elsa, not Anna, as the queen of Arendelle five years post-''Frozen''.
127* ''Franchise/{{Shrek}}'': ''[[https://www.fanfiction.net/s/4533795/1/Shrek-Goes-Fourth Shrek Goes Fourth]]'', then intended to be a sequel to ''WesternAnimation/ShrekTheThird'', originally named the ogre babies (who had NoNameGiven at the time) Alex, Luke and Emmie. After ''WesternAnimation/ShrekForeverAfter'' officially canonized their names as Fergus, Farkle and Felicia, the author would rewrite the fic a few years later to (among other changes) give the babies their canonical names.
128* ''WesternAnimation/TurningRed'': ''Fanfic/ThePandaChronicles'', published in 2022, set Tae Young as the fifth member of 4*Town. The 2023 tie-in manga ''Manga/FourTownFourReal'' confirms that it was actually Aaron T.
129[[/folder]]
130
131[[folder:Literature]]
132* One ''Literature/AccelWorld'' fanfic, which has since been deleted, had Haru encounter Kuroyukihime (aka Black Lotus)'s parent (the one who installed Brain Burst on her, which requires a close real-life relationship), and the person in question is male. It ultimately turns out that Kuroyukihime's canonical parent is White Cosmos, her older sister. It's also worth noting that Haru had correctly suspected that Kuroyukihime's parent was a girl as far back as Volume 2 of the light novel.
133* In a pretty silly and general example of this, ''Literature/TheEpicOfGilgamesh'' mentions an encounter with the giant Humbaba, but as chunks of the poem are lost, historians weren't very clear on the exact details. In 2015, fragmentary remains of a version of the poem ''were'' discovered, which filled out Humbaba's personality in greater detail--establishing him as more of a GoodIsNotNice NatureSpirit who is [[TheGoodKing beloved by all beings of the forest]], with Gilgamesh being treated as [[GreenAesop morally ambiguous at best]] in choosing to fight and kill him. This means that many depictions of Humbaba in fiction that depicted him as nothing more than a violent monster (for instance, ''TabletopGame/{{Pathfinder}}'''s Humbaba) are outdated.
134* ''Franchise/HarryPotter'':
135** Before ''Order of the Phoenix'' came out, almost everyone (particularly in the US) assumed that Ginny Weasley's given name was Virginia (for a notable example, see ''Fanfic/TheVerySecretDiary''). Rowling announced in an interview that Ginny's name is actually Ginevra, and this was later written into the final book, but many volumes of Virginia fanfic still lurk in the old corners of the fandom.
136** The first book mentions a "Blaise Zabini" in Slytherin, with no other information. The character became a popular OCStandIn, usually as a TokenGoodTeammate. Also, since it's a GenderBlenderName, American fans tended to create girl Blaises (usually with fiery red hair, owing to an OriginalCastPrecedent of sorts from her appearance as such in the popular [[Fanfic/TheDracoTrilogy Draco Trilogy]]) while Europeans had boys (often romantic Italians, given his Italian-sounding surname). ''Literature/HarryPotterAndTheHalfBloodPrince'' finally included a canon Blaise, who is male, black and a FantasticRacist like the other Slytherins. [[https://www.fanfiction.net/community/Cunning-Mysterious-and-Sexy-A-Blaise-Zabini-Fanfiction-Community/10138/ A selection of stories with Zabini written before his characterization was fleshed out appear here]], but here is an extract from one of these, ''His Secret'', which doesn't mix with his canon appearance.
137---> ''He had dark curly hair that he got from his father's side of the family but had been sorted into Slytherin because his mother's side has been there for generations.
138* The long gap between the release of the ninth and tenth ''Literature/HaruhiSuzumiya'' light novels naturally encouraged this, particularly since the ninth novel ended on a {{Cliffhanger}}:
139** For the first nine light novels, the only time anyone's parents are ever mentioned is Kyon making an offhand reference to his mother, who never appears herself. In addition, the long gap between the release of the ninth and tenth novels inspired quite a volume of fanfiction, one of which is ''Fanfic/MeetTheSuzumiyas'', in which Kyon winds up living with Haruhi, and has to deal with her parents: her father, Oruki, is an overprotective dad with a HairTriggerTemper, and her mother, Naru, is a {{Cloudcuckoolander}} and SupremeChef -- essentially, Haruhi's character traits are [[PatchworkKids split between her parents]] instead of [[InvertedTrope the reverse]]. This fanfic was quite popular and other authors came to use this interpretation of Haruhi's parents and even their names, and it might have ended there were it not for Haruhi's briefly mentioning her mother in the tenth book. From her description, she is a career woman who can't cook, meaning that Naru, at least, is totally inaccurate.
140** More significantly, novel nine has a scene in which Kyon receives a phone call from a girl he doesn't know, but she calls him "senpai" and talks as though she knows him, before hanging up in frustration. The fanfic ''Fanfic/KyonBigDamnHero'' wasted no time in giving her a name (Michikyuu Kanae) and making her a [[SailorEarth slider]] with a DarkAndTroubledPast who [[SixthRanger joins the SOS Brigade]] and interacts normally with the other characters. When book ten was actually released, it turned out that the girl is named Watahashi Yasumi and isn't a slider at all, or even a person. She is nothing more than a creation of Haruhi's subconscious.
141* ''Literature/TheHungerGames'': A number of fics for this fandom that date from before 2020 were rendered obsolete following the publication of ''Literature/TheBalladOfSongbirdsAndSnakes'', which revealed how the early Hunger Games worked and the identity of District 12's previously unnamed first victor.
142** The author of ''Fanfic/TheHungerGamesPrequelCollection'' had previously written a fic about the First Hunger Games (called simply ''The First Annual Hunger Games'') in which the Games were portrayed as though they were always the spectacle they eventually became. When it was revealed that many elements of the Games were not introduced until the Tenth Games or later, the author embarked on a new story about the First Hunger Games called ''Phoenix Rising'' which keeps the same characters but has a different plot to reflect what ''Ballad'' revealed about the early Games.
143** According to ''Fanfic/{{Quell}}'', Panem was ruled by a President Candlewick for the first thirty years of the Hunger Games, and District 12's first victor was Mandy Marlowe, the victor of the Third Hunger Games. ''Ballad'' revealed that Panem's president for at least the first ten Hunger Games was called Ravinstill, and District 12's first victor was Lucy Gray Baird, the victor of the Tenth Games.
144** In ''Fanfic/TheVictorsProject'', a District 12 tribute called Camden Donner is said to have won the Tenth Hunger Games. However, while ''Ballad'' (a prequel to the original trilogy) confirmed that District 12 did win the Tenth Games, the tribute concerned was a girl called Lucy Gray Baird.
145[[/folder]]
146
147[[folder:Live-Action Television]]
148* One ''Series/Numb3rs'' fanfic, [[https://www.fanfiction.net/s/2336627/1/Who-am-I Who Am I?]], had Don and Charlie's mother named Rose, as her name wasn't revealed as Margaret until the second season.
149* There are several ''Series/StrangerThings'' fanfics such as the [[https://archiveofourown.org/series/2534530 Stranger Things: Rebuilding]] series and the [[https://archiveofourown.org/series/1133375 The Life You Deserve Universe]] that depict Will Byers as being just as girl crazy as the other members of The Party and gaining a female love interest, most often pairing him with minor character Jennifer Hayes. Most of these fics were written before Season 4 would confirm that Will was gay and had romantic feelings for Mike.
150[[/folder]]
151
152[[folder:Video Games]]
153* ''Franchise/AssassinsCreed'': [[https://www.fanfiction.net/s/7128772/1/The_Hidden_One "The Hidden One"]], a one-shot short story about the life of Amunet, was written in 2011, six years before ''[[VideoGame/AssassinsCreedOrigins Origins]]'' was released. Just like her canonical counterpart, Amunet was a "Hidden One" and she was responsible for the death of UsefulNotes/{{Cleopatra}}; however, the circumstances for how she became an Assassin were completely different in ''Origins'' and its sequel comic. She was not her sister, Arsinoe IV, but instead she was a woman named Aya of Alexandria, who was married to Bayek of Siwa; they had a son named Khemu, who would be later killed by the proto-Templar Order of the Ancients. Also, she gave the queen a vial of poison to kill her. Additionally, Amunet and her husband are never called "Assassins" but instead "Hidden Ones" in-universe.
154* The ''VideoGame/DarkSouls'' mod ''VideoGame/DarkSoulsDaughtersOfAsh'' claims in its story that Gwyn never actually linked the Fire, but instead sacrificed his daughter Gwynevere to it. ''VideoGame/DarkSoulsIII'' contradicts this plot element both implicitly and explicitly. Implicitly, numerous item descriptions throughout the game hint that Gwynevere was alive long after the first game, and in fact became the queen of Lothric. Explicitly, the final boss, [[spoiler:the Soul of Cinder]], is said to be the embodiment of every person who ever linked the Fire, and it uses Gwyn's fighting style in its second phase, outright confirming that he sacrificed himself.
155* ''Franchise/{{Doom}}'': ''Fanfic/RemnantInferisDoom'' posited that [[VideoGame/Doom2016 the Doom Slayer]] was the son of [[VideoGame/{{Doom}} the original Doomguy]]. The canonical ''VideoGame/DoomEternal'' establishes that they're the same person.
156* ''VideoGame/FireEmblemThreeHouses'': ''Fanfic/TheSaviorKingTheMasterTacticianAndTheQueenOfLiberation'' gives names to Counts Hevring (Fredrick) and Varley (Maximus) and [[spoiler:the Agarthan impersonating Cornelia]] (Diado). These would be dated when the characters were named Waldemar, Grégoire, and Cleobulus respectively in ''VideoGame/FireEmblemWarriorsThreeHopes''.
157* ''VideoGame/FiveNightsAtFreddys''
158** Creator/MxBones' now infamous interpretation of the Purple Guy as a young man with a ponytail named "Vincent" was for a long time treated as '''the''' representation of the characters. This reached a controversial point where many fans were accused of romanticizing a character that was meant to be a [[WouldHurtAChild child killer]]. Then came ''VideoGame/FiveNightsAtFreddysSisterLocation'' which established the Purple Guy as a much older British man named William Afton who was a father of multiple children. Needless to say, "Vincent" faded into oblivion since then.
159** The webcomic ''Webcomic/{{Springaling}}'' began around the time the [[VideoGame/FiveNightsAtFreddys3 third]] and [[VideoGame/FiveNightsAtFreddys4 fourth]] games were released, resulting in the author having to make up information about the identities of several characters that had more details revealed about them in later installments.
160*** Springtrap's human self in this comic is essentially BOB from ''Series/TwinPeaks'', down to sharing his name, and he wore a Fredbear suit to lure kids. ''VideoGame/FiveNightsAtFreddysSisterLocation'' gives his name as William Afton, while ''VideoGame/FreddyFazbearsPizzeriaSimulator'' confirms that he used a golden Bonnie suit.
161*** The Crying Child lacks any connection to the murderer and is named Calvin. ''Sister Location'' reveals [[spoiler:he's one of William Afton's sons]] and later supplementary material heavily implies his name is Evan.
162*** In life, [[VideoGame/FiveNightsAtFreddys2 the Puppet]] was a teenaged boy named Ian. ''Pizzeria Simulator'' reveals that the Puppet is possessed by [[spoiler:a young girl named Charlie]].
163** ''VideoGame/MarioInAnimatronicHorror'' came out a few months before the release of ''VideoGame/FreddyFazbearsPizzeriaSimulator'', so the names chosen for the missing children were different than in canon[[note]]Gabriel, the soul possessing Freddy, is named "Tommy", Jeremy, the soul possessing Bonnie, is named "Buck", Susie, the soul possessing Chica, is named "Alex", and Fritz, the soul possessing Foxy, is "Kyel"[[/note]], the way how Henry dies is different from canon[[note]]Henry in ''FFPS'' dies in the fire that burns down the fake Freddy's location, while in ''MIAH'', Circus Baby kills him.[[/note]], and most egregiously, Michael Afton is not the one inside Springtrap in canon, but ''William''.
164** In ''WebOriginal/{{FNAFNG}}'', the Marionette is possessed by the mother of one of the missing children, an idea popularized by the fan song, "It's Been So Long" by Music/TheLivingTombstone. The idea was soon outdated by the time ''VideoGame/FreddyFazbearsPizzeriaSimulator'' was released, when it was revealed that not only was the soul possessing it a child, but also the Cassette Man's daughter. By that point however, the AU had already diverged far enough from the game's canon.
165* ''VideoGame/FridayNightFunkin'': The ''[[https://gamebanana.com/mods/186939 Rapper GF]]'' mod has Girlfriend portrayed as having a human skeleton similar to Boyfriend, since no one knew what Girlfriend's skeleton looked like at the time. However, this became inaccurate after the Week 7 update was released to Website/{{Newgrounds}}, where Girlfriend is shown to have a clearly demonic-looking skeleton, complete with devil horns on her forehead.
166* The ''VideoGame/HalfLife 1'' mod ''Echoes'' occasionally {{Flash Forward}}s to the future of the series' chronology, and one of said Flash Forwards is the climax of ''Epistle 3'', Marc Laidlaw's outline for the unmade ''VideoGame/HalfLife2: Episode 3'' where the G-Man abandons Gordon aboard the Borealis whilst "hiring" Alyx, leaving him to die on the ship on a crash course to the Combine homeworld. While the mod could probably still neatly fit into canon due to its ElsewhereFic nature, ''VideoGame/HalfLifeAlyx'' would provide a canonical version of Alyx's hiring, but long before the characters get to the Borealis.
167* ''Franchise/{{Halo}}''
168** [[http://halo.bungie.org/fanfic/?story=paladin.sindeath.html "The Law of Sin and Death"]], written two years before the release of the first game, is one of many examples of this in halo.bungie.org's fic archives. For one, Master Chief is nowhere to be found (his role is taken up by an OC); the ''Pillar of Autumn'' had civilians on board and is on the Halo for the long haul as far as anyone knows, and the Covenant seems to consist solely of Elites. Most notably, Cortana (or "the Sword") is depicted as a mysterious AI residing in Installation 04's systems who first appears to the main character as a seraph, and engages in frequent Biblical-flavoured back-and-forth with him. Towards the end, Cortana attempts to mentally merge with him, and is none too happy to be rejected. Cortana in the final game is...not like this.
169** [[http://halo.bungie.org/fanfic/?story=cox.beforethestorm.html "Before the Storm"]] (2001) posits that Master Chief is not only a battleroid (a type of combat cyborg from ''Marathon''), but possibly one of the battleroids responsible for the fall of the UESC, which was succeeded by "[=SolCore=]" (what the UNSC was called in early pre-release material). And whereas in canon, everyone's glad to have Master Chief around, ''this'' crew is wary of even having his stasis pod on board and dreads the day he must be "reactivated".
170---> Kaplansky looked at Bertram's expressionless face, and back to the mirror-like mask of the cyborg. Contained behind that mask was all the destructive knowledge of mankind. Everything they had fought so hard to forget.
171* ''VideoGame/KanColle'': For ''Franchise/{{Halo}}'' crossover fic ''Fanfic/ForEarthAndHerColonies'':
172** The fic had a number of (at the time) original shipgirls that were introduced into Kantai Collection proper after the fic was completed. The canon personalities of [[TeamMom Saratoga]] and [[LadyOfWar Warspite]] wound up being very different from the [[FourStarBadass Saratoga]] and [[SeenItAll Warspite]] depicted in the story.
173** In a more general sense, the fic depicted American aircraft carriers using black-powder muskets of the American Revolution or Civil War eras to launch their aircraft. The American carriers introduced into Kantai Collection proper have all used interwar or World War II-era to launch their planes, namely the M1928 Thompson or the M1903 Springfield rifles.
174* ''Franchise/KingdomHearts'': A popular Sora/Riku artist has several doujinshi where Riku is a LongHairedPrettyBoy, since he has long hair after joining Sora in ''VideoGame/KingdomHeartsII''. This was before his ImportantHaircut in ''VideoGame/KingdomHearts3DDreamDropDistance''.
175* ''VideoGame/MetalGear'': ''Webcomic/TheLastDaysOfFoxhound'', a webcomic focusing on the QuirkyMinibossSquad from ''Videogame/MetalGearSolid'', started a year before ''VideoGame/MetalGearSolid3SnakeEater'' and was finished less than two weeks before ''VideoGame/MetalGearSolid4GunsOfThePatriots'' came out; in the words of the author, ''Guns Of The Patriots'' came out just in time to contradict [[IKnewIt most]] of his ideas. A few examples include Big Boss being a ghost since his death in Zanzibar, him handling Liquid's education himself and his "sons" being born in 1977. Canonically, Big Boss survived Zanzibar but was imprisoned by the Patriots, he wanted nothing to do with his "sons" and his clones were born in 1972. To the author's credit, people being unable to say the name of [[AncientConspiracy The Patriots]] due to a nanomachine mental block and Liquid's [[ArtisticLicenseBiology tenuous grasp on genetics]] ''are'' canonical.
176* ''Franchise/{{Metroid}}'':
177** Due to the original ''VideoGame/MetroidIIReturnOfSamus'' being monochrome, fans disagreed prior to its VideoGameRemake ''VideoGame/MetroidSamusReturns'' as to whether the "dangerous liquid" keeping Samus from progressing until all the Metroids in the area are dead is magma or some type of poison/acid. The FanRemake ''VideoGame/AnotherMetroid2Remake'' went with the former, but ''Samus Returns'' depicts the liquid as toxic and purple.
178** Written between ''Super Metroid'' and ''Metroid Prime'', the DarkFic ''Fanfic/RiseFromDarkness'' depicts a ''very'' dark, emotionless version of Samus who works as a ProfessionalKiller. Future canon depicts her as stoic but clearly heroic, and her "Bounty Hunting" is more mercenary work than contract-killing.
179* ''VideoGame/PoppyPlaytime'': The web series ''WebAnimation/PoppyPlaytimeLogic'' has an episode titled "HUGGY WUGGY'S SAD ORIGIN STORY..." in which Huggy Wuggy is referred to as Expierment-1006. Chapter 2 of the game revealed that Experiment-1006 is actually a different character, and Huggy's designation is Experiment-1170 instead.
180* ''Franchise/ShinMegamiTensei'':
181** ''FanFic/{{Continuance}}'', a ''VideoGame/Persona4'' fanfic, was first published in 2011, before ''VideoGame/Persona4Arena'' was released. As such, not only is the protagonist called Souji Seta, his name from the manga, but his visit to Inaba for Golden Week is relatively unremarkable, and he doesn't participate in the Midnight Tournament.
182** Averted by retcon in ''Fanfic/QueenOfHearts'', in which the author went back and changed the ''VideoGame/Persona5'' protagonist's name to Ren Amamiya after he received a canonical name.
183** In ''Fanfic/TheAFRUniverse'', [[VideoGame/Persona5 Futaba Sakura's]] orange hair is treated as natural and comes from her biological father. An official artbook was later released that reveals Futaba dyed her hair orange on a whim.
184* ''Franchise/{{Splatoon}}'' fanfic ''Fanfic/FirstAidKitsAndDeepSecrets''. It was written prior to [[VideoGame/Splatoon2 the sequel]]'s release, and thus it's outdated on many accords. For example, Inklings know how to identify Octolings, which was something shared by many other fics at the times. In canon, over a century of the species not interacting means that most Inklings during the time period of the first two games saw their sister race as little more than vaguely "exotic" Inklings... at least, in Inkadia.[[note]]The [[VideoGame/Splatoon3 third game]] would reveal that there was no Great Turf War in the neighboring Splatlands region, and thus the two species never stopped interacting over there.[[/note]]
185* ''VideoGame/StardewValley'':
186** In the original game, the valley's summit becomes accessible once the player achieves HundredPercentCompletion and the GameMod, ''VideoGame/StardewValleyExpanded'' made the summit accessible much earlier. Patch 1.6 of the original game added a cutscene in which Mr. Qi will punish the player if they access the summit before achieving it.
187** In {{Fanon}}, Haley gets a lot of AdaptationalAngstUpgrade because of her parents' absence, with ''Stardew Valley Expanded'' adding a cutscene event in which she expresses sadness and frustration over it. And mods like "[[https://www.nexusmods.com/stardewvalley/mods/17674 Haley Event Expansion]]" go as far as showing it being outright traumatic for her. Patch 1.6 of the game added a new line of dialogue for her, in which she mentions that her parents told her and her sister, Emily, that they could join them on their trip anytime. Still, she declined, saying that "no one wants to spend their vacations with their parents."
188** In the mod ''VideoGame/RidgesideVillage'', during the Luau festival, Richard mentions that it's a very old tradition of the town, as "it was present before him and will continue after he's gone." The official {{prequel}} comic book ''ComicBook/StardewValleyBeforeTheFarmer'' revealed that the first Luau took place on the year before the Farmer arrived to the valley.
189* ''VideoGame/StarTrekOnline'': Due mainly to real-world money problems, ''STO'' suffered "The Great Content Drought" from roughly 2011 to 2013, resulting in much fanfic of the game going in a very different direction from what ultimately happened after the ''Legacy of Romulus'' expansion. A big one was ''Fanfic/TheWarOfTheMasters'', a sprawling SharedUniverse that developed on the official forum, which (besides introducing a completely original StoryArc about a group of Federation colonies switching sides to the Klingons) posited a significantly more extensive Undine infiltration of the Federation than ultimately became game-canon. In particular, Fleet Admiral Jorel Quinn is a MoleInCharge in the Masterverse (based on a fairly popular fan theory at the time), whereas in the 2014 mission "Surface Tension" he's confirmed to be an ordinary Trill. [[spoiler:It's his adjutant Commander E'genn who's the Undine.]] A SoftReboot of the Masterverse began around 2018 to bring its storyline closer to the game canon, but [[DeadFic petered out]] after a partial adaptation of the ''Victory Is Life'' storyline.
190* In the Japanese ''VideoGame/UmaMusume'' fanfic ''[[https://syosetu.org/novel/271427/ Ogon no Bokun X Eiein no Nibante = Hoshi no Koutei (Boku)]]'', the [[Main/OriginalCharacter OC]] protagonist [[{{Main/Reincarnation}} reincarnates]] into a [[FanCreatedOffspring fictional foal]] of [[https://en.wikipedia.org/wiki/Verxina Verxina]] before ultimately reincarnating once again in to the ''Umamusume'' universe... With Verxina as her[[note]]As a horse, the protagonist was a stallion, not a mare[[/note]] mother once again. Any chances of Verxina appearing as a parental figure to even her RL foals have been wiped out as of Season 3, specifically its 7th episode, of [[Anime/UmaMusume the anime]] as Verxina is properly introduced as an elder sister/fellow student to Cheval Grand.
191[[/folder]]
192
193[[folder:Visual Novels]]
194* ''VisualNovel/AngelsWithScalyWings'': One of the police officers, Naomi, is mentioned a couple times in the game, but does not make an onscreen appearance. There is a mod for the game called "A Solitary Mind" where you can date Naomi. Here, she is blue, quadrupedal, and has wings and lots of fins. Come the prequel comic, ''Angels with Broken Hearts'', and it is revealed that she is actually lavender, bipedal, wingless, and the only fin to be seen is at the base of her tail.
195* The ''VisualNovel/KatawaShoujo'' fanfic ''Fanfic/FromShizunesPerspective'', portrayed [[IncompatibleOrientation Shizune as a lesbian (or at least bisexual), while Misha was heterosexual]] with unrequited feelings for Misha -- in canon, the opposite is true. Interestingly enough, while the fic's Shizune is more or less fine with it, canonical Misha is not, and is troubled by Hisao getting together with Shizune.
196[[/folder]]
197
198[[folder:Web Animation]]
199* ''WebAnimation/{{RWBY}}'':
200** ''Fanfic/BelladonnaLilies'': Adam, though cold and cynical, is far kinder than how he'd be revealed to be in Volume 3.
201** Momoxtoshiro has written several fanfics, including ''Fanfic/TheChampionAndTheSinger'' and ''Fanfic/{{Camellias}}'', that depict Weiss' father as far nicer and more loving than he is in canon.
202** ''WebVideo/FixingRWBY'' created its own backstory for Roman Torchwick [[spoiler:tying him to Brunswick Farm and the Apathy]] and how he met Neo. This was before Rooster Teeth released ''Literature/RWBYRomanHoliday'', which is the origin story of both Roman and Neo's partnership.
203** ''Fanfic/TheGentleArtOfMakingEnemies'', a fic written and completed before Volume 2 came out, depicts Cinder as a WellIntentionedExtremist rather than the self-serving power-hungry monster she is in canon.
204** The 2014 oneshot ''Fanfic/IvoryBones'' revolves around Weiss' abusive home life. It depicts her father as more hands-on abusive, while in canon Jacques' abuse is primarily emotional. Weiss also lacks her older sister Winter or her younger brother Whitley. On a more subtle note, it's implied that Blake has a DarkAndTroubledPast involving her parents. In canon, Blake's parents are just fine, and her issues mainly start after she [[TheRunAway ran off]] to join the White Fang.
205** ''Fanfic/TheMakingsOfTeamCRME'': Up to about Chapter 9 of Volume 6, there was nothing in these stories that would contradict the show. Once that came out, cracks started to form when Emerald explicitly stated she didn't have anyone who loved her. In ''Fanfic/AnEmeraldUnearthed'', she knew her father and mother before going onto the streets. Also in that chapter, it revealed that Mercury's Semblance was stolen by his father. While nothing else in ''Fanfic/TheBlackHearts'' is contradictory, the fact that this is never mentioned would be odd considering the importance of such an event. There is also the fact that Volume 7 revealed that Watts was presumed dead by Atlas, meaning he couldn't work in a hospital during ''Fanfic/{{CRME}}''. Once Volume 8 finally gave Cinder's backstory, it was completely different from the one described in ''Fanfic/MyNameIsCinder''.
206** In ''Fanfic/MyHuntsmanAcademia'', the author said that Salem would be an EldritchAbomination whose visage has driven men to madness (specifically mentioning Tyrian Callows) and that the Grimm are her eyes and ears. That she is something from beyond time and space, something incomprehensible. This was outdated by Volume 6 of canonical ''WebAnimation/{{RWBY}}'', which reveals her backstory to be [[WasOnceAMan far different]]. The author has confirmed that it doesn't matter, though, as he's sticking with his interpretation for consistency's sake.
207** ''Fanfic/ReactWatchBelieveYikes'' started alongside Volume 1, so lots of it clashed with the show would present, such as Ruby and Yang being orphans with Yang being adopted (their shared father is alive, and so is Yang's mother), or Ruby only having a pet rock (her dog enters the show at some point). And given it is the cast riffing on ''WebAnimation/RedVsBlue'', takes a long while to make the girls realize main character Church has the same voice as their father.
208** ''Fanfic/{{Recovery}}'' is a take on Volume 4 written that started a few days before the first episode. It contains various differences, such as a lack of Whitley in early chapters (due to the fact he wasn't referenced in the previous volumes) and Yang's prosthetic requiring surgery.
209** ''Fanfic/RelicOfTheFuture'': The whole premise of the story deals with the canon story coming to a conclusion, only for one of the protagonists to go back in time because the ending was so bleak he wanted to try for a better one. As such there are a ''lot'' of assumptions made about how the show might continue after Volume 5, the latest season when the fic premiered, which proved pretty quickly to be off-base when Volume 6 started airing a few months later. Some of the new info is {{retcon}}ned into later chapters, but as the show continued further it became impossible to reconcile the setup of the fic as compatible with canon.
210** ''Fanfic/RWBYDestinyOfRemnant'': Raven may be aloof and pragmatic to a fault, but she's still depicted in a more positive light than her canonical counterpart, who was revealed to be selfish and cowardly.
211** ''Fanfic/ServiceWithASmile'':
212*** Adam Taurus is an AdaptationalNiceGuy, which was an intentional change, but it was done before Adam went ''[[{{Yandere}} completely psycho]]'' in Volume 6. The author admits he probably wouldn't have bothered making him nice if he had known. Adam is also able to take off his mask and blend in, while in canon he has a brand over his left eye.
213*** Adam tells Blake that no one in the White Fang really noticed when she disappeared; she wasn't particularly high-ranking, and those who remembered her just assumed she died on a mission. Canon soon revealed that not only was she a high-ranking member of Adam's White Fang, but she was the daughter of the original founder. ''Everyone'' noticed when she disappeared.
214** Being a fic run mostly on comedy, ''Fanfic/WeissReacts'' naturally has this, especially with the Schnee family (Winter being more... mild-mannered than canonical, Papa Schnee being a nice father, and ''Grandpa'' Schnee being the villainous one when it's actually inverted in canon).
215** ''Fanfic/WhiteNoise'' was written before Volume 4 revealed that Weiss' father was abusive. Its version of Jacques is much kinder than in canon.
216** ''Fanfic/WhiteSheepRWBY'' has Salem surprised that she's able to have children. However, Volume 6 would reveal that she did have kids thousands of years prior. The author would retroactively incorporate this into later chapters.
217* ''[[WebAnimation/Supermarioglitchy4sSuperMario64Bloopers SMG4]]'': The fanfic ''FanFic/SaikoRocks'' has Saiko depicted as living in a two-story house in close proximity to a quicksand pit which plays a significant role in the story. "[=SMG4=]: She's Back!" would show her canonical living conditions as being an apartment.
218[[/folder]]
219
220[[folder:Webcomics]]
221* The first issue of ''Webcomic/{{Sonichu}}'' was written during the third generation of the ''Franchise/{{Pokemon}}'' games, meaning Rosechu ended up having the pointed tail of a male Raichu rather than the blunted one female Raichu had in Gen 4 and onwards. This led to a joking TransAudienceInterpretation among the comic's detractors.
222[[/folder]]
223
224[[folder:Western Animation]]
225* ''WesternAnimation/AdventureTime'': For a large chunk of the show's original run, Marceline's mother was such a MissingMom that the only in-series proof she ever existed was a single mention in the first season, leading to much speculation as to who she was and what happened to her. Several fanart interpretations, like jackie-lyn's "[[https://www.deviantart.com/jackie-lyn/art/Marceline-s-Mommy-272101204 Marceline's Mommy]]" and [=TiaBlackRaven=]'s "[[https://www.deviantart.com/tiablackraven/art/AT-Marceline-s-mum-386383322 AT Marceline's mum]]", made her [[StrongFamilyResemblance look like much like her daughter]], with pale skin, long black hair, a taste for gothic fashion, and/or the same pointy ears, often making her some flavor of paranormal entity as well. When Marceline's mom finally did show up in Season 7's "Everything Stays" during the ''Stakes'' miniseries, she turned out to look nothing like these portrayals, with her being a normal human with brown skin, short hair, and a mundane outfit.
226* ''WesternAnimation/AvatarTheLastAirbender'':
227** The fan-comic ''Webcomic/AlternateHistory'' depicts the Fire Lord as a male-only position. Azula needs to produce a male heir but keeps having daughters. It was later revealed that the position of "Fire Lord" is unisex.
228** In the final chapter of ''[[https://www.fanfiction.net/s/6003673/0 The Children of War]]'', Ursa discovers that she is secretly the descendant of Avatar Roku, and is warned to not let the Fire Nation Royal court know. In ''ComicBook/AvatarTheLastAirbenderTheSearch'' Ursa is fully aware of her heritage, as is the Fire Nation government, as it is the reason Ozai marries her.
229* ''WesternAnimation/TheFairlyOddParents'':
230** The "Fairly Future Series" by [[https://www.fanfiction.net/u/655790/KwazyKandyPie KwazyKandyPie]], written in 2004, depicts Cosmo and Wanda as having a daughter named Venus. "Fairly Odd Baby" would later give them a son named Poof.
231*** The third and final entry in the series, ''[[https://www.fanfiction.net/s/2121147/1/FairlyFutureSeries2-Secrets-Secrets Secrets, Secrets]]'', depicts Wanda as a princess with a mother, father and brother. Canon would later reveal that she has a father who runs the Fairyland garbage collection like it was the Mafia, as well as a twin sister, but no mother.
232** In the fanfiction ''[[https://www.fanfiction.net/s/3617052/1/Love-Marriage-and-Ulterior-Motives Love, Marriage, and Ulterior Motives]]'', Timmy says that Da Rules forbid him for wishing up a child for Cosmo and Wanda, while ''[[https://www.fanfiction.net/s/3801912/1/Coming-Full-Circle Coming Full Circle]]'' (by the same author) has Wanda explain that she and Cosmo never had children because she is unable to bear children. Come "Fairly Odd Baby", Timmy DOES wish up a child for Cosmo and Wanda without being forbidden to do so by Da Rules, and it's revealed that MALE fairies carry and give birth.
233* ''WesternAnimation/GravityFalls'':
234** For most of the show's run, there were multiple fanworks under the collective "[[https://mysterytrio.tumblr.com/ The Mystery Trio]]" banner, going off the theory that the Author of the Journals was Grunkle Stan's twin brother Stanley, and they alongside Fiddleford [=McGucket=] studied the various supernatural occurrences in Gravity Falls. [[spoiler:While Stan's having a long-lost twin brother who was the Author turned out to be IKnewIt, as well as Fiddleford being an assistant to him, the Season 2 episode "A Tale of Two Stans" would reveal that Grunkle Stan wasn't part of the research team. Not only that, but Grunkle Stan wasn't Stanford, but Stanley; he faked his death and took on his brother's identity.]]
235** ''Fanfic/TheReturnToGravityFalls'' takes place three years after the end of the show. However, the author also began writing it a mere month after the show's second season began. He attempted to avert this trope by being deliberately vague about what might have happened after the events of Gideon Rises, but quite a few of the specifics he did have were jossed, such as [[spoiler:Stan still being the owner of the Mystery Shack post-series and the aforementioned Mystery Trio theory]]. Any minor details that didn't greatly affect any of the fic's own plots would [[OrwellianRetcon be rewritten as the fic went on]], before the writer decided it wasn't worth the hassle and proclaimed that (for the most part) only the events up to "Not What He Seems" happened in this story's timeline.
236* ''WesternAnimation/HazbinHotel'': The four year gap between the [[Recap/HazbinHotelS1E0ThatsEntertainment Pilot]] and the show made this inevitable. A prominent example is the Youtuber Paranoid DJ, who produced songs from the point of view of various characters. Notably, he made both Lucifer and Pentious [[CardCarryingVillain Card-Carrying Villains]]. The former [[spoiler: is established in the very first scene as having sympathetic motivations,]] while the latter [[spoiler: has a HeelFaceTurn in episode 2.]]
237* The ''WesternAnimation/InfinityTrain'' fanfic appropriately titled ''Fanfic/InfinityTrainFanfic'' was written based solely on the 2016 pilot and ended months before the series debuted, so this was bound to happen (though it also gets [[IKnewIt a surprising amount right]]):
238** The train in this fic was created to literally travel outside the bounds of creation to explore infinity. Meanwhile, the show's train is revealed at the end of the first season to be [[spoiler:an EpiphanicPrison that has improving the mental health and behavior of its passengers as its only goal]].
239** The fic depicts numbers as being grafted on any part of the body. In canon, the train always defaults to a passenger's hand, with WordOfGod stating it goes to the next available patch of skin if the person is an amputee.
240* ''WesternAnimation/TheLoudHouse'':
241** The fanfic ''Fanfic/WhatIsAPersonWorth'' has Mr. Santiago (Bobby and Ronnie Anne's father) as a character. The fic began before episodes like "Shell Shock" and "The Loudest Mission: Relative Chaos" made it clear that he is no longer around in the show itself. In the final chapter, the author tried to correct this error by having the character die in a car crash, going with the assumption that he was dead in the show. And then this in turn became outdated when the [[WesternAnimation/TheCasagrandes spin-off]] confirmed that Mr. Santiago is in fact alive and well in the show, but just living and working in Peru, and divorced from their mother. The fic also gives his name as Marcus, when the show establishes it to be Arturo.
242** The fic "The Loudest Mission: Relative Chaos" has the Santiago's still living in Royal Woods rather than move to another city like they did in the aforementioned episode.
243** A similar situation can be found in ''Fanfic/RequiemForALoud'', in which Bobby and Ronnie Anne's mother has passed away two years before the story, and their father is now their sole parent. This part of the story was written before it became clear that in the show itself, Mrs. Santiago is alive and raising the two kids alone while her husband is away.
244** The ''Fanfic/ALoudToStay'' uses the popular fan theory of Lincoln being adopted. Over a year later, the episode "Not A Loud" aired and debunked this theory.
245** In the fanfic ''Fanfic/{{Syngenesophobia}}'', the author has stated in a note in chapter 39 that several aspects of this fic have not aged well with later official episodes of the show.
246*** The story shows Lincoln, Lynn, and Luan going to the same school (a K-8 school), when later seasons prove that they go to separate schools (elementary, middle and high school).
247*** Benny no longer speaks to Luan for her role in beating up Lincoln. In the actual show, Benny becomes Luan's boyfriend at the end of "Stage Plight".
248*** One of the girls' punishments is being forced to visit Aunt Ruth every weekend, but combined with EarlyInstallmentWeirdness, the later episode "Ruthless People" shows Lana being the only one who enjoys visiting Ruth.
249*** The story claims Lucy was born with blonde hair. In canon, while she has been depicted as blonde before in "Back in Black," she's been later established as having had black hair at a younger age, and it's unknown what her natural hair color is.
250** ''Fanfic/LucysSecret'': The story states that none of Lucy's friends are in her class. It was written before the show revealed that her friend group actually is all in her class.
251* ''WesternAnimation/MiraculousLadybug'':
252** ''Fanfic/BeeNevolent'' was written and completed before the second season, and thus its take on the Bee Miraculous is quite different from canon. In the fic, the bee kwami is named Hanii, she has brown eyes and a motherly personality, and she gives the power to heal a single person/object; canon would later reveal that the bee kwami's name is Pollen, she has blue eyes and a more subservient personality, and she gives the power to paralyze a single person.
253** ''Fanfic/MovingOn'': As the fanfic was written before their official debut on the show, the Dragon and Snake Miraculouses grant PlayingWithFire and MindControlMusic powers, respectively, rather than ElementalShapeshifter and SaveScumming powers.
254** ''Fanfic/PowersOfInvisibility'' was written before season 2 aired, and said season ended up contradicting several things:
255*** Juleka in the fic is an only child who has incredibly neglectful parents who are content to leave their underage daughter alone while they live halfway across the world from her. "Captain Hardrock" revealed that Juleka actually has an incredibly loving (if anti-authoritarian) mother and an older brother.
256*** The Turtle Miraculous is given the power to restore someone who's been affected by an akuma's powers. Canon would later reveal that it actually grants BarrierWarrior abilities.
257* The release of ''WesternAnimation/OctonautsAboveAndBeyond'', which features non-anthropomorphic deer and tigers, caused this trope to happen to the fanfic ''Fanfic/JuniorOfficers'', which features anthropomorphic deer[[note]]Deborah, Margaret, David, Stacy, Gertrude, Humphrey, Mildred, and Pamela[[/note]] and tigers[[note]]Triton[[/note]].
258* The ''WesternAnimation/OKKOLetsBeHeroes'' [[https://archiveofourown.org/series/1050659 fanfic series]] simply known as the ''Perfect AU'' was subject to this multiple times. Before said fanfic series gained its name, it referred to Perfect KO as Kaio, since his name had not yet been confirmed in the show and the author considered it to be a good compromise - the author later went back and corrected this. His portrayal is also slightly different from the show's in general. Later on, this came up again due to the show having not yet clarified the connection between Laserblast, Shadowy Figure and Professor Venomous; in the fic, Shadowy Figure is Laserblast's SuperpoweredEvilSide (and Laserblast lacked the energy-draining ability he has in canon; Shadowy is his non-laser "power") who pulled a SplitPersonalityTakeover when the donut shop exploded, and Laserblast did, in a sense, die in that explosion (since only Shadowy remains). Venomous, meanwhile, is an entirely separate person. In the show, Laserblast was physically unaffected by the explosion, and merely chose to become a villain around that time, Professor Venomous is Laserblast after his FaceHeelTurn, and Shadowy Figure is his alter ego he sometimes turns into, who eventually tries to permanently seize control of his body much later. Additionally, in the fic Carol actually more-or-less ''knows'' what happened to Laserblast.
259* ''WesternAnimation/TheOwlHouse'': A key part of ''Fanfic/OutsidersTheOwlHouse'', which began publication during Season 1 of canon, is that Edric and Emira get disowned by their parents for being gay. By Season 2, however, it would be made clear that the Boiling Isles are a NonHeteronormativeSociety, where such a thing wouldn't even be notable, much less lead to such drama.
260* ''WesternAnimation/SamuraiJack'': The webcomic ''Webcomic/GrimTalesFromDownBelow'', a crossover series between many cartoons, had the original character Chi -- the daughter of Aku. Born from him thanks to VoluntaryShapeshifting, she's a CuteMonsterGirl with lesbian undertones (due to AuthorAppeal) that can be described as Aku as a cute girl, bringing [[EvenEvilHasLovedOnes the best out of him]]. In 2017, ''Samurai Jack'' returned for one more season, featuring Ashi, the actual daughter of Aku: a DarkActionGirl born as a member of the Daughters of Aku, a team of assassins who served an Aku-worshiping cult and Jack's eventual LoveInterest. While she ''is'' revealed to be Aku's literal daughter, ''she is not'' a DaddysLittleVillain, as he wasn't even aware she existed and both see each other as enemies. [[ArsonMurderAndJaywalking Also Aku didn't give birth to anyone.]]
261* The ''WesternAnimation/SheRaAndThePrincessesOfPower'' fanfic ''Fanfic/CatRa'' has its LotusEaterMachine chapters depict Beast Island as the origin of Catra and her kind, being an untamed wilderness that was later ravaged by the Horde, which was a popular theory prior to season four. While those chapters were written after that season released, the author had not yet watched it, meaning they weren't privy to the reveal that Beast Island is a man-made island made mostly of discarded, ancient technology and host to very little natural life.
262* ''WesternAnimation/StarVsTheForcesOfEvil'':
263** Much of ''Fanfic/QueensOfMewni'' had been created before Seasons 3 and 4 aired, and before ''Literature/TheMagicBookOfSpells'' was published, so the author decided to make it a full blown AU. Most notably, there are ''way'' more queens than canon, Crescenta became a DecompositeCharacter (her character design became Solena the Smitten and her name was attached to a new character), [[spoiler: Comet is Moon's ''adoptive'' mother (biological aunt) and served as Moon's regent, and Star is a legitimate descendant of the Butterfly family instead of being from an impostor line.]]
264* ''WesternAnimation/StevenUniverse'':
265** ''Fanfic/MagnaClades'': The fic was made during the middle of the show's first season. It features significant divergences from canon, like the Gems being from an alternate universe named Mineralis and having males of their kind.
266** ''Fanfic/NewFeelings'': Much like ''Magna Clades'' above, the fanfic was written during the show's first season. It also features the Gems having males and females when they're a feminine-presenting OneGenderRace in canon.
267** ''Fanfic/CrystalGemAcademy'' portrays "Pink Diamond" as simply being the title of Rose Quartz. Later events in the show's canon make it clear that [[spoiler:it's the other way around, with "Rose Quartz" being an alias that Pink Diamond used]].
268** In ''[[https://archiveofourown.org/works/8285479 That Which Surrounds]]'', there is no acknowledgement of [[spoiler:Rose being Pink Diamond]]. More blatantly, when Steven dies, Rose reforms -- a far cry from the canonical "SHE'S GONE!" scene, which confirmed that [[spoiler:even when separated from Steven, his mother's gem is still ''his'' and only manifests a HardLight version of Steven rather than her]].
269** The humorous fan blog ''Texts Between Gems'' encountered this in various ways; most notably, its initial depiction of Yellow Diamond turned out to be ''very'' different from her canonical counterpart... and since the blog was already essentially CrackFic (and made many jokes involving gems referring to each other as being family members despite them [[BizarreAlienReproduction technically not having relatives]]), it explained her blatantly out of character behavior away by [[https://textsbetweengems.tumblr.com/post/136844870182/the-truth-finally-comes-out revealing]] that those texts were actually from her ''very non-canonical'' twin sister "Mellow Diamond."
270* The ''WesternAnimation/VoltronLegendaryDefender'' fanfic series ''Fanfic/VoltronDuality'' gave Pidge and Matt's mother the name Karen, before WordOfGod revealed that her name was Colleen.
271[[/folder]]
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