If an adaptation of a series is popular, it will [[LostInImitation leave its stamp on subsequent adaptations]]. More strangely, a popular adaptation may leave its stamp on the series it was adapted ''from'', if that series is still ongoing.

For the more general application of changes to the work, see {{Retcon}}.

The CanonImmigrant is often a walking example of Ret Canon. See also: AdaptationDisplacement and CanonDiscontinuity.
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!!Examples:

[[foldercontrol]]

[[folder:Anime & Manga]]
* ''Franchise/DragonBall'': Creator/AkiraToriyama was so impressed with the TV special featuring Goku's father Bardock that he subsequently [[CanonImmigrant incorporated the character into the manga]] for a two-panel flashback to the ending of the special, earning both him and the special canon status. This makes Bardock the only anime-original character to be featured in the manga. Taken even further with ''Anime/DragonBallKai''a recut of the ''Anime/DragonBallZ'' anime with 99% of the filler taken out, in which ''Bardock's death at the hands of Freeza is used as the introductory scene''.
* Shortly after the ''Franchise/{{Negima}}'' alternate universe adaptation introduced Armor Nodoka's ability to split her Diarium Ejus up to read multiple minds, the Nodoka of the manga gained this ability as well (though her version actually shrinks the books based on how many splits she's used).
* A character was brought [[BackfromtheDead Back from the Dead]] in Manga/GaRei because of Anime/GaReiZero. A lot of later flashbacks also borrowed from the anime.
* Excalibur's song in ''Manga/SoulEater'' was something invented for the second episode about him in the anime, which was not based on anything in the manga. The next time he appeared in the manga, Excalibur started singing the song.
[[/folder]]

[[folder:Comic Books]]
* In Franchise/TheDCU:
** Franchise/{{Batman}}'s BattleButler Alfred was originally drawn as a stout and clean-shaven man, but in 1944 he was dispatched to a health resort from which he would return thin and mustached so that he would resemble William Austin's portrayal in the 1943 serial. Also, he originally died in the comics but the 60's Creator/AdamWest [[Series/{{Batman}} series]] got him revived. The change was spoofed in a 1994 "Zero Hour" story that ostensibly took place after Alfred had left Bruce Wayne while they were tracking down Bruce's kidnapped girlfriend and Tim Drake's father in England [[TenMinuteRetirement (though he came back about a year later)]]; Batman and Robin are confronted by a short, fat, non-mustached, Cockney-accented double of Alfred reminiscent of the early 1940s portrayal, and immediately remark that Alfred doesn't look like himself. Alfred then reminds them of his resort vacation, which (in the new continuity) he has just returned from, and explains that the resort was not a health spa at all, but a school for private detectives (the "new" Alfred wants to follow in his employers' footsteps). The short, fat Alfred eventually disappears long before the real Alfred returns.
** [[NewerThanTheyThink It may seem hard to believe]], but Comicbook/{{Catwoman}} didn't wear a black costume until the 60's ''Series/{{Batman}}'' and ''Film/BatmanReturns''. Prior to (and long after) that, she usually wore purple in the comics. It wasn't until Darwyn Cooke's revamp in 2002 that she officially adopted a black SpyCatsuit in the comics.
** Batman's GrapplingHookPistol also [[http://goodcomics.comicbookresources.com/2012/11/30/comic-book-legends-revealed-395/ originated]] in the first Creator/TimBurton ''Film/{{Batman}}'' movie.
** The Batman storyline "The Destroyer" ended with Gotham sporting a redesigned look that resembled the city's retro art deco depiction in the Tim Burton movies.
** It was Creator/MarlonBrando's idea to have Jor-El wearing a recognizable 'S' logo in the 1978 ''Film/{{Superman}}'' film, making it a preexisting Kryptonian emblem rather than merely a personal symbol of Superman. This change filtered into the comics awareness, explicitly finalized in the 2003 title ''ComicBook/SupermanBirthright''.
** The childhood of Clark Kent was changed once in response to the Movie with his powers developing gradually and no career as Superboy, and more recently it has changed again to become closer to the portrayal in ''Series/{{Smallville}}'', including restoring SelfDemonstrating/LexLuthor as a Smallville resident and [[WeUsedToBeFriends friend]] of Clark (which, ironically, is what they had changed him ''from'' Post-Crisis).
*** His career as Superboy was a retcon in itself. The original telling of Superman's origin in ''Action Comics'' #1 had him raised in an orphanage, and his super powers developing slowly during adolescence.
*** Smallville itself first appeared in the earliest Superboy comics, but they never specified exactly where in the country it was located until after the Movie had put it in Kansas.
** Indeed, the whole cold, antiseptic look of the PostCrisis Krypton was taken from the movie. Ironically, ''Superman: Birthright'' undid this change, moving it back toward the [[TheSilverAgeOfComicBooks Silver Age]] version.
*** Post-''Infinite'' Crisis, Krypton is even ''more'' like the movie version than it was post-Crisis. Superman's fortress is now the same crystalline structure seen in the films (and in ''Series/{{Smallville}}''), complete with Jor-El hologram.
** Also, after the movie, many artists drew Superman resembling Creator/ChristopherReeve.
*** With John Byrne being the first, because he couldn't follow the style of Curt Swan.
** The Hall of Justice from the ''SuperFriends'' cartoon was made canon in the comics after ''InfiniteCrisis''.
** In both the Golden and Silver Age, Franchise/WonderWoman had the magic lasso -- which could compel total obedience from anyone caught in it. As one might imagine, she had it used on her pretty regularly. As this was regarded as a little squicky for television, the lasso's ability to compel was reduced to being able to force its captive to tell the truth. This is now so canon, [[Wiki/{{Wikipedia}} The Other Wiki]] doesn't even mention the original ability.
*** More recently, Wondie has started spinning around to change her clothes, a [[TransformationSequence magical transformation]] used in the 1970's [[Series/WonderWoman TV show]], but not in the comics until twenty years later, when PromotedFanboy Phil Jimenez was writing & drawing the book.
** After 2001's ''WesternAnimation/JusticeLeague'' cartoon featured a Hawkgirl as a member, writer Joe Kelly chose to add the DC Universe's then-current Hawkgirl to the contemporary JLA (even though this was a different character, connected to the ''[[TheGoldenAgeOfComicBooks Golden Age]]'' Hawkgirl rather than the [[TheSilverAgeOfComicBooks Silver Age]] version from which the cartoon's heroine was adapted).
*** ''Justice League'' also introduced the idea that John Stewart (''Franchise/GreenLantern'') was a Marine, an idea that's since filtered into the comics.
**** John Stewart also returned to being an active Green Lantern and joined the League during Kelly's ''JLA'' run and started wearing the same costume he wore on ''WesternAnimation/JusticeLeague'' (sans gloves) and the same haircut the animated Stewart had in the first two seasons.
***** While John Stewart has yet to sport the "bald with goatee" look from the ''Unlimited'' seasons, [[MirrorUniverse Power Ring]] does sport a similar one, thanks in part to the events of ''Comicbook/JLAAvengers'' destroying and rebuilding the Crime Syndicate's universe, giving him a RaceLift that changed him from a blonde Kyle Rayner counterpart into a counterpart for Stewart. Also after joining the post-''Comicbook/InfiniteCrisis'' incarnation of the League, John joked about Comicbook/BlackLightning's current bald look, then said he'd looked look good bald with a goatee.
** The ''WesternAnimation/TeenTitans'' cartoon debuted in the same month as a relaunch of the ''ComicBook/TeenTitans'' series. Both took inspiration from the classic 80s Marv Wolfman/George Perez "New Teen Titans" series, but it was also pretty obvious that DC was making their properties look similar across the board.
*** The cartoon team was composed of {{Robin}}, Starfire, Comicbook/{{Cyborg}}, Comicbook/{{Raven}}, and Beast Boy. The comics team was composed of former ''ComicBook/YoungJustice'' members Robin, ComicBook/{{Superboy}}, WonderGirl, and Kid Flash, with the 80s Titans Starfire, Cyborg, Raven and Beast Boy returning. The comics team thus superficially resembled the cartoon team - only with the former Young Justice members, most notably Comicbook/{{Robin}}, being {{Legacy Character}}s of the 80s Titans. At least some of the older Titans were not even teenagers by this point, having aged into their 20s. Notably, comics Raven, in spirit form before the relaunch, was given a new teenage body just for the series, and Gar Logan's codename, then Changeling, reverted to Beast Boy (despite being more like Beast ''Man'').
*** Many of the characters in the cartoon saw their comic versions' costumes get redone to match (or at least more resemble) their animated counterparts. Even Starfire (whose ultra-{{stripperiffic}} [[ChainmailBikini bikini-like "armor"]] isn't going anywhere anytime soon) has her boots changed to resemble series Star.
*** The romantic subtext between Raven and Beast Boy in the cartoon made it into the comics in a bona fide {{squee}} moment. The author claims he didn't do this because of the show, though.
*** Bumblebee's [[{{Sizeshifter}} shrinking abilities]] were also introduced in the show, before being made canon in the comics after ''Comicbook/InfiniteCrisis''. Prior to that, she simply had a suit of PoweredArmor that resembled that of a bee.
*** A '90s Titan named Joto was revamped as "Hotspot" in the toon [[note]]due to "Joto" having a derogatory meaning for homosexuals in Spanish, though it means "heat" in Swahili[[/note]], and received flamethrower powers as opposed to simply using heat generation. After ''Infinite Crisis'', the comic Joto inexplicably took on the flaming head look of his animated self, the "Hotspot" codename, and began using fire as an ability.
** Ever since ''WesternAnimation/BatmanTheAnimatedSeries'' redefined Mr. Freeze as a tragic figure, consumed for the lost love of his stricken wife, the original comic version was changed to resemble that. Originally, he was just a villain with a gimmicky weapon with no back story, a version that appeared in ''WesternAnimation/TheBatman''.
*** Based on the popularity of the animated series version of the ClockKing (Temple Fugate), a new Clock King with the same name and dress was introduced to Franchise/TheDCU (though instead of AwesomenessByAnalysis powers, this version has actual precognitive abilities as well as a sadistic streak).
*** The series also went with the ComicBook/{{Batgirl}} moniker to make Barbara Gordon begin using that identity as a student rather than a librarian as it originally was, and given this change in age, she got a flirting relationship with Robin (Dick Grayson, now {{Nightwing}} in comics). Now flashbacks tend to show Barbara getting her Batgirl identity at her teens, and having an on-off relationship with Nightwing (who, before that, was mostly interested on his Titans teammate Starfire, so ShipToShipCombat abounds).
*** The series also introduced the idea of Bruce Wayne being childhood friends with {{Zatanna}}, which was later made canon in the comics by Creator/PaulDini after ''InfiniteCrisis''. Prior to this, Batman had been portrayed as being ''much'' older than Zatanna. Only the later series ''WesternAnimation/YoungJustice'' has kept Zatanna younger, making her a peer of Robin.
** Superman flies because the Fleischer cartoons found it easier to animate flight than jumping. Simultaneously, [[Radio/TheAdventuresOfSuperman the radio show]] started depicting Superman flying so that they could fit plot exposition into scenes while he traveled place to place. However, the radio show avoided calling it flight. Most of his other powers came from the radio or cartoon shows, too. Initially, he was just as the opening sequence described him: faster than a speeding bullet, more powerful than a locomotive, and able to leap tall buildings InASingleBound. Heat vision, super breath, and more were largely later additions.
*** ''Action Comics'' (DC) itself also gradually drifted toward flight due to artist mistakes. As artists depicted Superman performing more and more impossible maneuvers in midair, AC writers explained it away as his ability to change trajectory in midair. When Fleischer, who had followed the comics and radio show, asked point-blank if Superman could fly, AC gave up and said he could. It didn't become official though until a 1942 Superman novel written by the head writer of the radio show, where it explicitly stated Superman flew across the Atlantic Ocean to stop a Nazi rocket missile. By 1943, Superman could fly 8 times the speed of light.
** Superman's childhood home Smallville was apparently just as [[WhereTheHellIsSpringfield vaguely located]] as Metropolis, until the 1978 movie set it in Kansas.
** Though General Zod already existed in the comics before and after ''Film/SupermanII'', his backstory became such a mess that eventually DC decided to make a "definitive" reboot of the character based on his most iconic version: that of the aforementioned film.
** Kryptonite was first introduced on [[Radio/TheAdventuresOfSuperman the Superman radio show]] in 1943, before being incorporated into the comic book.
*** Before the radio show, there was a proposed story called "[[http://k-metal.nu/splash.php The K-Metal from Krypton]]". It involves Superman dealing with an element called "K-Metal", a precursor to Kryptonite. But [[ExecutiveMeddling this was scrapped]] since it would change the StatusQuoIsGod drastically (which included [[SecretKeeper Lois discovering Clark is Superman]]).
** When TheFlash got a [[Series/TheFlash TV series]], a couple of small changes were made in the comic: Wally got a dog and a new costume with a symmetric belt like the one on the show. This was only fair since the TV Flash, while based primarily on Barry Allen, also borrowed elements from Wally (such as his post-Crisis need for huge amounts of food).
*** During ''Flash: Rebirth'' Wally gained yet another new costume that was even more inspired by the live-action suit. It had the pointed, Batman-like nose and the darker color scheme, in addition to the aforementioned belt. The costume also added a logo similar to the one on Wally sported in ''WesternAnimation/JusticeLeague''.
** {{Katana}} had always been more of a lower-tier, ensemble character, but her big role in ''WesternAnimation/BewareTheBatman'' led to DC giving the character her own solo book, as well as a spot in the ''Franchise/{{Justice League|OfAmerica}}''.
** The ''Comicbook/BrightestDay'' and ''Comicbook/{{New 52}}'' versions of ComicBook/{{Firestorm}} were inspired by the character's portrayal in ''WesternAnimation/BatmanTheBraveAndTheBold''. While the Jason Rusch/Ronnie Raymond combo had shown up in the comics before, it was the TV show that established Jason as a ChildProdigy. Prior to that, he was mostly an average student who relied on Professor Stein to provide Firestorm's science knowledge.
** Comicbook/{{Static}} was given both of his costumes from the ''Comicbook/StaticShock'' cartoon; the original in the ''Rebirth of the Cool'' limited series, and the second after joining Franchise/TheDCU around the time of ''Comicbook/FinalCrisis''. Note that Static's [[http://upload.wikimedia.org/wikipedia/en/7/7f/Static2.jpg original outfit]] looks ''nothing'' like either of the suits from [[http://static.tvtropes.org/pmwiki/pub/images/static_shock.jpg the cartoon]].
** Despite ''WesternAnimation/SupermanTheAnimatedSeries'''s version of Comicbook/{{Supergirl}} being Kara In-Ze, a loose adaptation of Kara Zor-El, the then-current Supergirl in the comics, Linda Danvers was given the "white shirt, hot pants" Supergirl costume used in the series.
** ''[[WesternAnimation/BatmanTheAnimatedSeries The New Batman Adventures]]'', the sequel show to ''WesternAnimation/BatmanTheAnimatedSeries'' featured revamped designs for every character, in order to streamline the show's look to make it easier to animate on the smaller budget, as well as to make it more compatible stylistically with ''WesternAnimation/SupermanTheAnimatedSeries''. Most of the new designs were poorly received (especially the Joker's), but one in particular that most people seem to like is Scarecrow's. It didn't look much like an actual Scarecrow (more like a western preacher), but it was pretty creepy (which is good considering fear is the Scarecrow's whole shtick). The staff liked the outcome, particularly since they'd fiddled around with different designs before and found them ineffective. Since TNBA, many versions of Scarecrow incorporate that version's distinctive hanged man's noose.
*** Two more from ''[[WesternAnimation/BatmanTheAnimatedSeries The New Batman Adventures]]''. Between the end of "[[Comicbook/BatmanNoMansLand No Man's Land]]" and the end of the events of "[[Comicbook/GrantMorrisonsBatman The Return of Bruce Wayne]]", Batman had returned to using the original/"[[ComicBook/BatmanYearOne Year One]]" costume, which was what the costume he wore in ''[=TNBA=]'' (and ''WesternAnimation/JusticeLeague'') was based on. Likewise, after the "One Year Later" TimeSkip after ''Comicbook/InfiniteCrisis'', Tim Drake donned a tweaked version of the costume he wore during ''TNBA''.
** When Comicbook/{{Vixen}} rejoined the Justice League after ''InfiniteCrisis'', she was given her look from ''JusticeLeagueUnlimited''.
** As of the Comicbook/{{New 52}}...
*** Amanda Waller is a lot slimmer, ala her appearance in ''Film/GreenLantern'' and ''{{Smallville}}''.
*** Commissioner Gordon had reddish-brown hair in the present day, ala his appearance in ''Film/TheDarkKnightSaga'' and Zsasz grew a beard like his appearance in ''Film/BatmanBegins''.
*** Bane initally had a look reminiscent of the one he had in ''VideoGame/BatmanArkhamAsylum'' and ''[[VideoGame/BatmanArkhamCity Arkham City]]'', though it's since been tweaked to include a vest and cargo pants similar to his ''Film/TheDarkKnightRises'' incarnation.
*** Etta Candy got a RaceLift ala her counterpart in the [[Series/WonderWoman2011Pilot failed]] ''Series/{{Wonder Woman|2011Pilot}}'' [[Series/WonderWoman2011Pilot pilot]] and is now African-American.
*** Additionally, both Miss Martian and Sportsmaster have since been seen wearing their costumes from ''WesternAnimation/YoungJustice''. [[note]]Although Miss Martian's cameo was later edited out of Teen Titans in the trade paperback version, due to some higher-up ExecutiveMeddling. The "stealth costume Miss Martian" has now been replaced by an unidentified blonde heroine.[[/note]]
*** Coincidence or not, some have also noted that Comicbook/HarleyQuinn's ''Comicbook/{{New 52}}'' design resembles the iteration of the character seen in the ''Theatre/BatmanLive'' stage show and ''VideoGame/BatmanArkhamCity''.
*** The Tumbler from ''Film/TheDarkKnightSaga'' has been made canon in ''[[Creator/DCComics Detective Comics]]''.
*** VandalSavage's facial scars from ''WesternAnimation/YoungJustice'' have been incorporated into his modern design.
*** [[Series/{{Arrow}} Tommy Merlyn as Oliver Queen's best friend before he became Green Arrow]].
*** Catwoman's new origin is closely based on the ''Film/BatmanReturns'' version.
*** Wally West is now half-African American, taking a nod from ''Series/TheFlash2014'', where Iris West and her family are black. Iris herself is still white in the comics, since her New 52 counterpart debuted before the show began production.
* In the Franchise/MarvelUniverse:
** Following the success of the [[Film/XMen1 2000 movie]], the Comicbook/{{X-Men}} switched to dark leather costumes which more closely resembled those of the movie. Toad's markedly different appearance and advanced powers (a mostly regular-looking guy with a prehensile tongue and amazing acrobatic skills as opposed to a deformed hunchback who just jumps around a bit) was also copied.
** As a minor example, Rogue used to have a white SkunkStripe, across her head from front to back. Ever since the movies, only her front bangs have been white (even in ''ComicBook/XMenForever'', where her original hair style, at least at first, should have been retained).
*** The writers can't even decide whether Rogue's hair is naturally like that, or, [[AllThereInTheManual as mentioned in an '80s letter column]] bleached by her for effect...
*** The leather costumes only lasted until 2004, when they returned to more traditional superhero costumes.
*** Rogue also lost her curls in favor of straight long hair similar to Creator/AnnaPaquin's.
*** Rogue's real name, Anna Marie, was also taken from the movies, where she was NamedByTheAdaptation.
** Greg Rucka and other artists showed {{Wolverine}}'s claws coming from between his fingers as opposed to the backs of his knuckles. Also, like the Superman example, some artists have drawn Wolverine looking like HughJackman.
** Mystique also gained a scaled, reptilian appearance to better reflect her movie counterpart. This too was eventually undone.
** SelfDemonstrating/{{Magneto}}'s plastic prison from the movies was used in ''Comicbook/UltimateXMen''.
** It may shock people to learn that the idea of the Xavier Institute as an actual school was also something that came from the movies. Originally, the school aspect was more of a cover story than anything, and the only actual "students" were the X-Men themselves. Then the [[Film/XMen1 first movie]] came out and introduced the idea of the Institute as a real school with numerous mutant students, and Creator/GrantMorrison subsequently made the idea canon in the comics.
** Due to the popularity of ''Film/XMenFirstClass'', Marvel launched ''First X-Men'', a prequel series about an early incarnation of the team led by Magneto and a not-yet-disabled Professor Xavier.
** Gambit's role in ''Film/XMenOriginsWolverine'' led to the ''Weapon X: First Class'' mini-series, which established that as a teen, Gambit was present at the Weapon X facility the night {{Wolverine}} made his fateful escape.
** In the original comics, Iceman was a founding member of the team and about the same age as Comicbook/{{Cyclops}} and the other X-Men. The movie made him a teenage trainee who was significantly younger than the real X-Men, and this eventually carried over into ''Comicbook/UltimateXMen'', ''WesternAnimation/XMenEvolution'', and ''WesternAnimation/WolverineAndTheXMen''.
** Circa 2005, Franchise/SpiderMan gained biological webshooting powers like those portrayed in his [[Film/SpiderMan eponymous 2002 movie]]. Continuing the trend, in 2007, the "Back in Black" storyline, wherein Spidey starts wearing the black costume again, echoes ''Film/SpiderMan3'', which is a retelling of the original black costume storyline.
** In the original Black Costume saga, the symbiote did not affect Peter's personality, at all. It just made him tired because it would take his body out crime fighting while he slept. The addition of it making him more violent and mean came from [[WesternAnimation/{{Spider-ManTheAnimatedSeries}} the '90s cartoon]].
** According to WordOfGod, the second [[Comicbook/SuperiorSpiderMan Superior Spider-Man]] costume was [[http://i1.cdnds.net/13/14/618x932/comics-superior-spider-man-14-teaser-artwork.jpg directly inspired]] by the unused design Alex Ross [[http://www.alexrossart.com/galleries/spiderman/full/spiderman4.jpg created for the first movie]].
** The supervillain Bullseye originally wore a costume with a mask that had a bullseye design on it. In [[Film/{{Daredevil}} the 2003 movie]], Bullseye dressed like a biker and had a bullseye scar directly on his forehead. Sometime later [[Comicbook/{{Daredevil}} the comic book]] version received the scar as well, when an enraged Daredevil carved a bullseye into the forehead of his nemesis.
** The Bullseye seen in ''[[ComicBook/ThePunisherMAX Punisher Max]]'' had even more of the movie's influence. He not only had the scar, but also ran around in [[CivvieSpandex street clothes]] [[NotWearingTights as opposed to a costume]].
** The {{Ultimate|Marvel}} version of ComicBook/{{Elektra}} wears a black costume similar to that of her [[Film/{{Elektra}} movie]] counterpart.
** The famous phrase "with great power ComesGreatResponsibility" was shortened from a longer form and attributed to Uncle Ben by {{Retcon}}. (It was originally spoken by the narrator.)
** The Negative Zone, a longstanding element of ComicBook/FantasticFour stories, was brought into the Ultimate universe under a new name: the N-Zone. Since then, characters have occasionally used this term for the Negative Zone in the regular continuity.
** Creator/MattFraction made the Thing Rings from ''WesternAnimation/FredAndBarneyMeetTheThing'' canon in ''Comicbook/{{FF}}''. Though in this case, they're used by Darla Deering rather than [[Comicbook/FantasticFour Ben Grimm]].
** Comicbook/CaptainAmerica's sidekick, Comicbook/TheFalcon, briefly wore the same armored costume he wore in the short-lived ''WesternAnimation/TheAvengersUnitedTheyStand'' animated series. However, when he rejoined the Avengers a few years later, he ditched the threads.
** Speaking of Cap, the popularity of the Franchise/MarvelCinematicUniverse films has led to his comic counterpart sporting an outfit that looks greatly inspired by his appearances in ''Film/CaptainAmericaTheFirstAvenger'' and ''Film/TheAvengers''[[note]]Of course, the costumes seen in the aforementioned films were directly inspired by Cap's outfits in the Ultimate Universe[[/note]] as part of the Marvel NOW! relaunch. Said costume does away with the flared gloves and buccaneer boots, replacing them with more utilitarian gloves and combat boots. The familiar chainmail of his old costume is replaced with a more modern-looking armor design, as well. Finally, a blue helmet with painted-on wings takes the place of his winged mask.
** The idea of [[Comicbook/WarMachine James Rhodes]] and Pepper Potts as contemporary supporting characters was something introduced in ''Film/{{Iron Man|1}}''. Up until that point, the characters had little interaction or relation in the comics. This also carried over into ''WesternAnimation/IronManArmoredAdventures'' and ''WesternAnimation/AvengersEarthsMightiestHeroes''.
** The comic version of ComicBook/{{SHIELD}} has since adopted the Avengers Initiative from the Franchise/MarvelCinematicUniverse. The second volume of ''Comicbook/SecretAvengers'' sees S.H.I.E.L.D. using the Initiative to recruit its own team of superheroes, similar to the origin of the Avengers in the [[Film/TheAvengers live-action film]].
** Comicbook/{{Hawkeye}} now wears a black leather costume similar to the one he wears in the Franchise/MarvelCinematicUniverse. The movie costume is itself inspired by the one seen in ''TheUltimates'', though the current mainstream outfit adds in some purple coloring.
** The [[NormanOsborn Iron Patriot]] armor has returned to the Marvel Universe due to its use in ''Film/IronMan3''. It was used by Tony Stark in ''TheUltimates'' and, like in ''Iron Man 3'', by [[Comicbook/WarMachine James Rhodes]] in ''Comicbook/SecretAvengers''.
** Comicbook/{{Blade}}'s original powers were being immune to vampire bites, aging slowly and nothing else. He later picked up enhanced senses but didn't really become super in any sense of the word until his [[Film/{{Blade}} film]] came out.
** [[Comicbook/IncredibleHulk The Hulk]]'s reintroduction into the Avengers was also motivated by the films. In the original comics, he quit after one issue, but the MarvelNOW relaunch has since seen him return to the team as a main character.
*** The Hulk's iconic "YouWouldntLikeMeWhenImAngry" {{Catchphrase}} originated in the [[Series/TheIncredibleHulk 70's live-action show]].
** From the classic ''Comicbook/AgeOfApocalypse'', we've got the classic Sunfire later sporting his [=AoA=] counterpart's look, ironically as a horseman of Apocalypse. Earlier than that, Shadowcat briefly employed a claw device similar to the one used by her [=AoA=] self.
** The movie version of the Chitauri ([[InNameOnly who were almost nothing like]] the Chitauri from ''TheUltimates'') immigrated to the mainstream Marvel Universe as enemies of Comicbook/{{Nova}}.
*** The true face of the original Ultimate Universe Chitauri wasn't revealed[[note]]As DarkerAndEdgier versions of the mainstream universe's Skrulls, they usually appear shapeshifted and nobody knew what they really looked like for ages. Also, ''being'' Skrull {{Expies}} is why all adaptations' Chitauri, even before the movie, are your basic AlienInvasion and not shapeshifters; Creator/MarvelAnimation tends to just use Skrulls when it wants Skrulls.[[/note]] until ''[[CataclysmTheUltimatesLastStand Hunger]]''--when it was shown they look exactly like their movie counterparts.
** In the lead-up to the ''Film/GuardiansOfTheGalaxy'' movie, Marvel had [[GuardiansOfTheGalaxy Star-Lord]] adopt the BadassLongcoat worn by Chris Pratt in the film.
** ''Series/AgentsOfSHIELD'' came up with the idea of giving Donnie Gill ([[ComicbookMoviesDontUseCodenames "Blizzard"]]) actual [[AnIcePerson cryonic abilities]], rather than having them come from [[ClothesMakeTheSuperman his costume]] or PoweredArmor. This change carried over into the comics, where Blizzard was revealed to be an [[TheInhumans Inhuman]] during ''Comicbook/{{Infinity}}'' and ''Comicbook/{{Inhumanity}}''. Due to production time, the change actually happened in the comics ''before'' Donnie even debuted on TV.
** In the lead-up to [[Film/CaptainAmericaTheWinterSoldier the second Captain America film]], the [[BuckyBarnes Winter Soldier]] began wearing his face mask and goggles from the movie in the {{flashback}} series ''Winter Soldier: The Bitter March''.
*** The movie introduced a drug that Bruce Banner had designed to control Hulk-Outs. Though it proved ineffective on Banner, NickFury discovered that it could be easily used to create a FauxDeath effect on normal people. This drug (with the same origin!) later appeared in ''[[Comicbook/TheInvaders All-New Invaders]]''.
** After becoming the new CaptainAmerica, [[TheFalcon Sam Wilson]] was redesigned and given a new costume that incorporates his red goggles from his outfit in ''Film/CaptainAmericaTheWinterSoldier''.
** The Spider-Cycle from the ''WesternAnimation/UltimateSpiderMan'' cartoon appeared in an ImagineSpot in issue #200 of the ''Comicbook/UltimateSpiderMan'' comic.
* Other:
** The original ''Comicbook/{{Teenage Mutant Ninja Turtles|Mirage}}'' comics were remarkably resistant to this, but an exception showed up with Casey Jones. Casey was originally introduced as a fairly loopy vigilante whose motivations mainly seemed to be watching ''way'' too much TV. However, in the [[WesternAnimation/TeenageMutantNinjaTurtles2003 2003 cartoon]] he was given a YouKilledMyFather backstory involving the Purple Dragons gang and their leader Hun; Hun was [[CanonImmigrant imported]] into the Mirage comics late in the run of ''Tales of the TMNT'', and Casey's background was updated accordingly.
** Since the release of the video game adaptation of ''VideoGame/TheDarkness'', the [[ComicBook/TheDarkness comic]] adapted a couple traits from the game, notably [[spoiler:the titular Darkness' ability to take control of its host whenever it wants]].
** As the Comicbook/ScottPilgrim film (''Film/ScottPilgrimVsTheWorld'') had been in development since the release of Volume 1 (of 6), elements from the script (and interactions with screenwriters Creator/EdgarWright and Michael Bacall) were incorporated by creator Bryan Lee O'Malley into subsequent volumes, per his own confessions. Much of Volume 6 was written during and directly after filming of the movie adaptation, meaning Jason Schwartzmann's portrayal of Gideon had been filmed while O'Malley's conception of the character was in flux, thus influencing the character's depiction in the graphic novel. Furthermore, some shots originating in the film's climax (the elevator with a downward arrow indicating its direction; the overhead angle of Scott [[spoiler:dead]] on the floor) were directly incorporated into Volume 6. O'Malley has also stated that certain gags (such as the lines "It was just a [bisexual] phase," "You had a sexy phase!?") originated in the film's screenplay and were adapted into the graphic novels with permission, and that certain scenes were inspired by trips O'Malley took around Toronto with Wright and Bacall (such as the Honest Ed's sequence from Volume 3, which apparently came from Wright and Bacall's genuine shock and confusion once they entered the store, and horror upon seeing a particularly grotesque wall-mounted deer-head clock).
* A minor one from Franchise/ArchieComics. In ''Comicbook/SabrinaTheTeenageWitch'', Aunt Hilda & Zelda were an old crone & a chubby green-haired woman, respectively. Around the time of [[Series/SabrinaTheTeenageWitch the TV show]], they were changed into attractive middle-aged women.
** A major change was Salem. He was originally a normal, non-talking orange cat until the TV show. Now he's a black cat who used to be a human.
* The ''Comicbook/{{Spawn}}'' comics changed the title character's origin so that he was killed by Jessica Priest rather than Chapel from ''{{Youngblood}}''. This concept originated in [[Film/{{Spawn}} the movie]], and was made canon after RobLiefeld left ImageComics ([[ChannelHop and took Chapel with him]]).
[[/folder]]

[[folder:Film]]
* ''Film/GIJoeTheRiseOfCobra'' [[RaceLift recast]] Ripcord (formerly a redheaded white guy) as black. Since then, Ripcord has been introduced in two new continuities - the [[GIJoeIDW IDW comicbooks]] and the ''WesternAnimation/GIJoeRenegades'' cartoon - and in both of them he's a young black man.
* In order to manage the LoadsAndLoadsOfCharacters in Arthurian legend, John Boorman's ''Film/{{Excalibur}}'' merged the characters of Morgause of Orkney and Morgana le Fay into one CompositeCharacter, keeping the latter's name and powers of sorcery, but giving her the former's role of mothering Mordred after an incestuous affair with Arthur. Though he may not have been the ''first'' to make this change, his film popularized the incestuous angle between Morgana and Arthur in many adaptations to come.
[[/folder]]

[[folder:Literature]]
* One of the main plot elements of the many adaptations of ''Literature/TheStrangeCaseOfDrJekyllAndMrHyde''--namely the two female characters, Jekyll's innocent fiancee and Hyde's slutty barmaid girlfriend--is not present in the original novel at all. This plot thread was created for the wildly successful 19th century stage adaptation of the novel, and has since become part of almost all subsequent adaptations.
* Creator/JKRowling mentioned in an interview that after she saw the first ''Film/HarryPotter'', her own mental image of Snape changed to resemble Creator/AlanRickman, which would then affect the way he's described in the later books. This applied to the chapter illustrations in the American versions as well. ''Prisoner of Azkaban'' and ''Order of the Phoenix'' had portraits of Snape as balding and with a goatee, but ''Half-Blood Prince'' showed him with long black hair and no facial hair, just like in the movies.
* Similarly, both Colin Dexter (''Series/InspectorMorse'') and Ruth Rendell (''InspectorWexford'') have said their mental images of their detectives were dramatically affected by the TV adaptations.
** Reprints of the novels changed Morse's car from a Lancia to the Jaguar he drove in the TV show.
* Thomas Harris has been quoted as saying this is exactly why he never watched the movie adaptation of his novel ''Literature/TheSilenceOfTheLambs''; not because he disapproved of it, but because he didn't want Creator/AnthonyHopkins' portrayal of Hannibal Lecter shading the character's portrayal in the sequels.
* This is also Creator/TerryPratchett's official reason for not reading ''Literature/{{Discworld}}'' FanFiction, along with the legal ramifications that can come with an unintentional (or coincidental) Ret Canon.
* In the same vein, Creator/JohnLeCarre stopped writing the novels built around George Smiley and the Circus in the early 1980s since, after several wildly popular TV adaptations, he kept seeing Alec Guinness when he wrote the character.
* In the early ''Literature/{{Sharpe}}'' novels, Sharpe is a Londoner. Following the TV series, later books reveal he fled to Yorkshire as a teenager, where he presumably picked up Creator/SeanBean's accent.
* After ''Film/DrNo'' was released and made ridiculous amounts of money for all involved, Creator/IanFleming gave Literature/JamesBond Scottish ancestry (rather ironic, considering he considered Creator/SeanConnery a bad choice for the role at first).
* In Craig Thomas' novel ''Firefox'', the titular fighter craft was originally nothing more than a [=MiG=]-25 Foxbat augmented with state of the art technology. After Creator/ClintEastwood's 1982 [[Film/{{Firefox}} movie adaptation]] came out with its iconic [[CoolPlane superfighter design]], subsequent republishing of the novel would use the movie version of the Firefox to depict the craft. In addition, Thomas changed the description of the plane in the sequel novel ''Firefox Down'' to match the new appearance.
** The Firefox (both the plane and movie plot) is actually an Expy of the 'MiG-242' from an episode of Gerry Anderson's puppet series 'Joe 90'.
* The original novel of ''HouseOfCards'' ends with [[spoiler:Francis Urquhart's death]]. This was changed in the TV adaptation, enabling sequels. The two sequels to the novel (both adapted for TV later) are based on the TV ending.
* Creator/ArthurCClarke's ''Film/TwoThousandOneASpaceOdyssey'' originally had the mission going to Saturn. It was changed in the films as they couldn't get the rings right, and that change crept into all subsequent adaptations. (This is a bit of a sidewise example, though. The movie is not an adaptation of the novel, nor vice versa-- they were developed in parallel.)
* At the end of the novel ''Literature/JurassicPark'', Ian Malcolm dies. He survives in [[Film/JurassicPark the movie]], and in the sequel to the book he is the protagonist. On the flip side, several characters who survived in the book but were killed in the movie adaptation are mentioned in ''Literature/TheLostWorld1995'' book sequel as having died from assorted natural causes some time after escaping the island. The only major exception to this is Hammond, who stayed dead in the books and alive in the movies.
** Robert Muldoon is about the only character who survived in the book and died in the movie without being killed off. He doesn't make an appearance (or is even mentioned aside from namedropping of all the survivors) in the sequel, though.
* Other than the basic premise of "[[RogerRabbitEffect cartoon characters are real and live side-by-side with humans]]" and four important characters (Eddie Valiant, Roger and Jessica Rabbit, and Baby Herman), there are almost no similarities between the book ''Literature/WhoCensoredRogerRabbit'' and the movie ''Film/WhoFramedRogerRabbit''. However, the author liked the movie much more than he'd liked his own novel, and when he wrote a sequel, ''Who Plugged Roger Rabbit?'', he followed up the movie's continuity, not the book's (which was even {{handwave}}d away as being AllJustADream).
* Martin Caidin's ''Marooned'' featured a Project Mercury mission. Later editions matched up with the movie and featured a Apollo-style spacecraft.
* The original "Literature/SnowWhiteAndTheSevenDwarfs" fairy tale does not have her being awakened by a kiss; that was an addition by [[Disney/SnowWhiteAndTheSevenDwarfs Disney]]. Instead, the apple was dislodged from Snow White's throat when the prince's servants dropped the glass coffin. It's rare to see a "Snow White" adaption that doesn't include it now, even ones that attempt to go back to Creator/TheBrothersGrimm story.
* While Creator/RoaldDahl ultimately [[DisownedAdaptation disowned]] [[Film/WillyWonkaAndTheChocolateFactory the first movie adaptation]] of ''Literature/CharlieAndTheChocolateFactory'' (which he wrote the original script for, but it was substantially rewritten by David Seltzer), he did work the phrase "Strike that, reverse it" into Willy Wonka's dialogue in the book's sequel ''Literature/CharlieAndTheGreatGlassElevator''. The phrase becomes a recurring one in the [[Theatre/CharlieAndTheChocolateFactory 2013 stage musical adaptation]] of ''Factory'' in a sort of merging of this trope and InternalHomage.
[[/folder]]

[[folder:Live-Action TV]]
* ''Series/MightyMorphinPowerRangers'' originally had Zordon existing in a limbo dimension, with the tube he spoke out of being only his form of communication. ''Film/MightyMorphinPowerRangers'' had Zordon being physically in the tube in a pocket dimension and capable of being killed by rupturing that tube. In ''Series/PowerRangersTurbo'' (about two years after the first movie) Zordon was magically brought to the physical tube in a pocket dimension, allowing him to return to his homeworld and exist in a state similar to the movie, and in fact became a major plot element of ''Series/PowerRangersInSpace'' where Zordon is captured.
** Speaking of homeworld, ''Power Rangers: The Movie'' had Lord Zedd acknowledge that Zordon's home planet is Eltar, something that was never mentioned in the show. Since then, Eltar was mentioned in a few post-MMPR seasons.
* As of Series IV of ''Series/RedDwarf'', Lister's backstory with Kochanski was retconned to one closer to what appeared in the novel ''Red Dwarf: Infinity Welcomes Careful Drivers'' than had been detailed in the first two series. Originally he'd been hopelessly in love with her, but never had the nerve to ask her out ("In your entire life, your conversations with her totalled 123 words. You had a better relationship with your rubber plant"); in the books they dated for a while, then she got back with "Tim, or Tom, or it may have been Tony" from Catering. The breakup first gets mentioned on screen in the Season IV episode "DNA", and Tim is referenced in Season VII's "Ouroboros" and Season VIII's "Krytie TV".
** One episode of that series was adapted from a section of a novel, rather than the other way around: the episode "White Hole" is based on the "Garbage World" section of the novel "Better Than Life".
* ''{{Smallville}}'' introduced an {{Expy}} of the GreenArrow foe Merlyn known as Vordigan the Dark Archer. When Merlyn was brought into ''Series/{{Arrow}}'', [[AdaptationNameChange Malcolm Merlyn became his real name]] (his real name in the comics is Arthur King), while his {{codename}} was changed to the Dark Archer.
[[/folder]]

[[folder:Music]]
* After [=UB40=] hit the top of the charts with a reworked reggae version of Neil Diamond's "Red Red Wine", Diamond began performing ''their'' version of the song in concert.
** [=UB40=]'s version was based on Tony Tribe's 1971 reggae reworking of the song, but evidently that hadn't been popular enough to justify Diamond changing his arrangement.
* Music/JohnnyCash's version of Music/NineInchNails' ''Hurt''. Trent Reznor himself even said:
-->It feels like I've just lost a girlfriend, because that song isn't mine anymore.
* Music/BobDylan in concert tends to perform Music/JimiHendrix's cover of his song "All Along the Watchtower".
* Music/BillyJoel likes Music/GarthBrooks' version of ''Shameless'' so much that he lets Garth come out and sing it when he gives a concert.
* Noel Gallagher of Music/{{Oasis}} went through a phase of doing Music/RyanAdams' cover of "Wonderwall", most notably on his solo and acoustic tours.
* Music/SuicidalTendencies brought in significant funk influences from their side project, Infectious Grooves.
* Robert Smith, singer and guitarist for Music/TheCure, enjoyed Music/DinosaurJr's cover of "Just Like Heaven" so much that it has drastically influenced the way that The Cure play the song in concerts.
* Humorous example: After "Weird Al" Yankovic parodied {{Madonna}}'s "Like a Virgin" music video with his own "Like a Surgeon", Madonna appeared in a second video dressed as a surgeon.
[[/folder]]

[[folder:Tabletop Games]]
* ''TabletopGame/{{Warhammer 40000}}'' didn't even ''have'' two-handed Thunder Hammers before ''VideoGame/DawnOfWar'' gave one to its Force Commander.
** Technically the Thunder Hammer is not a two-handed weapon, you just can't get a bonus attack unless you have a pair (or in 6th edition, a Thunder Hammer and a Powerfist/Lightnig Claw), which no official model has. However, it was not availeable for a power armoured character until the 5th edition Space Marine codex, which came out after Dawn of War.
** Tau Railrifle was first introduced in the ''Fire Warrior'' game, and was given rules as a White Dwarf supplement before being added to the next codex.
[[/folder]]

[[folder:Theatre]]
* Revivals of a musical with a successful movie version will often try to find places to add songs written for the movie back into the show. E.g. ''Theatre/{{Cabaret}}'', ''Theatre/TheSoundOfMusic'', ''Film/{{Grease}}''.
* Revivals of ''Theatre/AnythingGoes'' invariably include "It's De-Lovely," "Friendship" and other Music/ColePorter songs originally written for other shows.
* The licensed version of ''Film/TheWizardOfOz'' as a stage musical still has those damn ruby slippers, while the originals were silver.
[[/folder]]

[[folder:Theme Parks]]
* After the ''Franchise/PiratesOfTheCaribbean'' movies became popular, references to the characters were added to the original [[Ride/DisneyThemeParks Disney World]] ride, along with several animatronic appearances of Captain Jack Sparrow. The latter are particularly jarring, as all of the original characters are cartoony caricatures of human beings, but Jack is a perfect likeness of Creator/JohnnyDepp's character (although Depp himself may be sufficiently cartoony to justify this).
** More jarring is the sound. Jack Sparrow and redone sound clips mentioning him sound very clear, while any audio still from the original version of the attraction is far scratchier.
[[/folder]]

[[folder:Video Games]]
* ''Franchise/MortalKombat'''s Kano was originally American raised in Japan, but after the [[Film/MortalKombat first film]], Trevor Goddard's Australian interpretation was sufficiently well received for him to become an Aussie in the games. Just to complete the mess, Goddard was actually a Londoner who spent his entire life acting as an Australian in order to fill a gap in the Hollywood market. Sadly, Goddard passed away from a bad drug overdose in 2003 and Kano was officially made Austrailian from then on, in his honor.
** Other elements of the movie which made the cut for the games are the importance of winning ten tournaments, Kitana as Liu Kang's {{Love Interest|s}}, and Johnny Cage and Goro's rivalry.
** As of ''[[VideoGame/MortalKombat9 MK9]]'', the ShipTease between Johnny and Sonya (assumed to be canon on most fans' part anyway) became canon, albeit in the form of BelligerentSexualTension (at first, anyway; Sonya mellows out a bit towards Johnny over time). In ''VideoGame/MortalKombatX'', we learn that [[spoiler:they eventually have a daughter together, named Cassie]].
** Also, [[PhysicalGod Raiden]] in later games seems to be heavily influenced by Christopher Lambert's portrayal in the movies, specifically his long white hair, his [[DeadpanSnarker dry sense of humor]], and the fact that he is forbidden from directly interfering in the tournament.
* The Franchise/{{Kirby}} platformer ''VideoGame/KirbySqueakSquad'' redesigned Dedede's palace to resemble the one from the [[Anime/KirbyRightBackAtYa anime adaptation]]. The room where Kirby fought Dedede even contained the monster summoning device from the series.
** Similarly, ''Kirby: Nightmare in Dream Land'', the [[VideoGameRemake GBA remake]] of ''VideoGame/KirbysAdventure'' features the Fountain of Dreams from ''VideoGame/SuperSmashBros Melee'', complete with its remixed stage music.
** ''[[VideoGame/KirbySuperStar Super Star Ultra]]'' and ''[[VideoGame/KirbyMassAttack Mass Attack]]'' started giving attention to Sword and Blade as Meta Knight's followers, most likely because they were in the anime (where Axe, Mace, Trident, and Javelin were nowhere to be seen). Also, in ''Super Star Ultra'', the Halberd was redesigned to resemble its ''Brawl'' appearance.
** Kirby's CatchPhrase "poyo!" and Dedede's VerbalTic "zoi" are both originally from the anime, as is Meta Knight's habit of wrapping his cape around himself.
** Escargo(o)n, Customer Service, and Macho-San/[[DubNameChange Max Flexer]] appear in different extra mini-games in ''Kirby Mass Attack''.
* On the subject of ''Smash Bros.'', that game influenced how [[VideoGame/FZero Captain Falcon]] was portrayed; all of his appearances after the ''SSB'' games now have him with all of his ''Smash Bros.'' moves intact. It overlaps with AscendedMeme as well. In ''F-Zero GX'', the song that played during the credits reel when you completed Story Mode [[http://www.youtube.com/watch?v=f1XW1Y1Tu5A#t=1m5s mentioned the]] [[MegatonPunch Falcon Punch]], hinting that it was one of his canon abilities (his other ''SSB'' moves are left up in the air). In ''[[TheAnimeOfTheGame Falcon Densetsu]]''[=/=]''[[Creator/FourKidsEntertainment GP Legend]]'', Falcon [[http://www.youtube.com/watch?v=FFtw7qW7Vcw gets to finally]] [[MemeticMutation show his moves]] during the GrandFinale [[spoiler:[[DyingMomentOfAwesome and goes out in a blaze of glory]]]].
* ''Franchise/{{Pokemon}}''. ''Red'' and ''Blue'' versions didn't take the TV show into account. Later versions do. It shows.
** ''Pokemon Yellow'' is ''Red'' and ''Blue'' altered to match the anime. Pikachu is the starter, Jessie and James appear regularly, the Pokemon designs reflect their TV appearances (rather than the OffModel, [[NightmareFuel/{{Pokemon}} Nightmare Fuel]]-inducing original sprites), and the main Team Rocket mons are uncatchable (because Ash would never [[JustForPun catch 'em]]). Surprisingly, one of the uncatchable mons is Weedle, which Ash attempted to catch in the anime.
*** Brock mentions his wanting to be a breeder in the games as well. The nurse sprite was altered to match Nurse Joy.
*** Misty obtains Togepi in [[Anime/{{Pokemon}} the anime]]. Misty has a Togetic in the games. Togepi evolves in the anime.
** In the canon games, come ''VideoGame/PokemonGoldAndSilver'' Misty has some minor {{Tsundere}} and HotBlooded qualities that she lacked in the original.
* ''VideoGame/SilentHillHomecoming'' takes many of its visual cues from [[Film/SilentHill the film adaptation]] (which the fans HATE). This is one of the reasons why it's considered the scrappy of the franchise.
* ''Franchise/SonicTheHedgehog'':
** Sonic's love of chili dogs featured in [=DiC=]'s animated adaptations didn't come from any of the games, but it eventually made its way into ''VideoGame/SonicUnleashed'', which features numerous food items Sonic can obtain, including chili dogs, described as his favorite. Also used in ''VideoGame/SonicChronicles''.
** Made awesome in the intro to ''[[VideoGame/SonicStorybookSeries Sonic and the Black Knight]]''.
** Also, Shadow taking off his rings for an energy boost came from ''Anime/SonicX'', but has since appeared in ''[[VideoGame/SonicTheHedgehog2006 Sonic 2006]]''.
** In addition to that, ''Sonic Chronicles'' features the [=SWATbots=] from the old ''Sonic'' cartoon as enemies.
** Dr. Eggman used to only be called Robotnik outside of Japan, and vice versa. Now his full name worldwide is Dr. Ivo "Eggman" Robotnik.
** The idea of Knuckles the Echidna being a treasure hunter comes from the [=OVAs=].
** In the games, Dr. Eggman, while having his robotic minions, didn't have any close sidekicks; compare this to ''any'' of the animated series, where his counterpart has ''some'' sort of underling (Scratch, Grounder and Coconuts in ''WesternAnimation/AdventuresOfSonicTheHedgehog''; Snively and Cluck in ''WesternAnimation/SonicTheHedgehog''; Sleet and Dingo in ''WesternAnimation/SonicUnderground''; Bocoe, Decoe and Bokkun in ''Anime/SonicX''). This was rectified in ''VideoGame/SonicUnleashed'', which gave him SA-55 "Orbot" as a snarky direct underling, and then furthered in ''VideoGame/SonicColors'' with "Cubot", giving Orbot somebody else to play off of for humor.
* The idea of pairing Luigi and Daisy might be the only plot element from the 1993 ''Film/SuperMarioBros'' movie that was actually adapted into the video games (Though [[RepetitiveName "Mario Mario"]] and "Luigi Mario" has popped up in Nintendo of America made media, despite WordOfGod saying they lack surnames). In her debut in ''VideoGame/SuperMarioLand'', Daisy was simply a Peach {{expy}} for that game and it wasn't until the later ''VideoGame/MarioParty'' and Sports games that the idea of having her as Luigi's love interest came about.
** Additionally, Luigi's cowardice originally was introduced in the cartoon spinoff ''Series/TheSuperMarioBrosSuperShow''.
* Many elements from the various media adaptations of the ''Franchise/StreetFighter'' franchise ended up being used in the backstories of later games. Most notably, ''Anime/StreetFighterIITheAnimatedMovie'' greatly influenced the plot of the ''Street Fighter Alpha'' prequel series, from M. Bison's more muscular design to the origin story of Ryu's red bandanna. Masahiko Nakahira's manga adaptation of the first ''Alpha'' game featured a storyline involving Ryu being possessed by the Satsui no Hadou, the same power used by Akuma; this concept would be reused for Ryu's storyline in' ''Alpha 2''.
** While the real reason may be simple convenience for the artists of the scene, Guile's intro in ''VideoGame/StreetFighterIV'' shows him holding Charlie's dog tags, on which the name "Charlie Nash" is written ('Charlie' is his name in western territories, while 'Nash' is his name in Japan). While the true use of this probably is to avert having to redraw the scene for Japanese audiences, the name 'Charlie Nash' is a common {{Fanon}} name as well as the name given to Charlie in UDON's [[Comicbook/{{Streetfighter}} comic book series]] (which is how it fits into this trope).
** Maki from ''FinalFight 2'' originally sported a different outfit, but was redesigned for the ''Sakura Ganbaru!'' manga series. Elements of Maki's manga design (namely her footwear and the use of a tonfa as her personal weapon) were incorporated into her new design for ''[[VideoGame/CapcomVsSNK2MarkOfTheMillennium Capcom Vs. SNK 2]]'', and later the ''VideoGame/StreetFighterAlpha'' series of games.
* The ''Literature/WorldsOfPower'' series of children's books based on [=NES=] games ended up affecting two games' sequels.
** "Kal Torlin", which was the name of the land where ''VideoGame/{{Shadowgate}}'' took place, was first used in ''Before Shadowgate'' and ended up used in ''Shadowgate 64''.
** Eve, the young woman Jason falls in love with in the novelization of ''Blaster Master'', ends up being his wife in the sequel ''Blaster Master: Blasting Again'' for the PlayStation. The author of the book was surprised to find out that his character had become canon.
* Creator/SquareEnix cannot decide as to whether [[VideoGame/FinalFantasyVII Cloud]] stabbed Sephiroth and chucked him into a mako reactor in a HeroicBSOD RoaringRampageOfRevenge, or if Sephiroth just jumped in himself to spite Cloud and because he had foreknowledge of the power of TheLifestream. This plot event is slightly different in the three games and one OVA it's featured in
** There are [[RashomonStyle varying focal points]] for each entry of the Compilation's "version" of the Nibelheim incident (for example, ''VideoGame/CrisisCore'' is from Zack's POV, whereas ''Last Order'' is more multifaceted, incorporating Cloud and the Turks into the equation), as well as the original game's rendition itself (due to Cloud's screwy memories and mental state at that point). According to WordOfGod, UnreliableNarrator[=/=]UnreliableExpositor applies here.
* UpdatedRerelease ''Franchise/FireEmblem: [[VideoGame/FireEmblemAkaneia New Mystery of the Emblem]]'' several details that were simply WordOfGod, such as Ogma being a former gladiator, and made them part of the characters' official backstories through its support conversations. There's also a DownloadableContent map which centers around a duel between Ogma and [[SpellMyNameWithAnS Navarre]] similar to the second episode of the short-lived anime.
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/TransformersAnimated'' has a group called the [[PraetorianGuard Cybertron Elite Guard]] serving as the commanding military and security force for the Autobots. Then, the [=BotCon=] 2009 theme was about a similar group (with the same winged Autobot insignias) set in [[TransformersWingsOfHonor G1 continuity]] called the ''Cybertronian'' Elite Guard. The Elite Guard are also in ''Prime,'' with Smokescreen having once been a member.
* In another Transformers example, the ''WesternAnimation/BeastWars'' toyline originally portrayed the events as taking place on present day Earth and Optimus Primal and Megatron being merely new forms of [[Franchise/TransformersGeneration1 Optimus Prime and the original Megatron]]. When the animated series premiered with the events taking place on prehistoric Earth via time travel and Primal and Beast Megatron being made {{legacy character}}s, the toyline was changed to match up with the cartoon.
** ''WesternAnimation/TransformersPrime'' shows heavy influence from the ''Film/{{Transformers}} series'' including the general appearance of Optimus Prime, Bumblebee and Megatron, as well as Bumblebee's muteness (although he now speaks in generic beeps and tones instead of talking using clips from his radio). Many fans have described the aesthetics of the robots as a mix of Movie-style and Animated-style.
** The ''War for Cybertron'' game was effectively a G1 prequel, stated to be in the same universe as the ''Prime'' series [[WordOfSaintPaul by the toy company]] despite the existence of Dark Energon being the only thing the two stories had in common. However, the sequel, ''Fall of Cybertron,'' is upping the similarities to Prime with Cliffjumper's head design changing from a G1-inspired design to a clearly Prime-inspired on as well as [[spoiler:Bumblebee having his voice box destroyed by Megatron, muting him in the same way as in the Films and Prime.]] ''Prime'' has also had a few nods to the games. Both versions have left their marks on each other to the point that they've sorta converged.
** Prime also follows in the footsteps of ''Exodus'' lately, incorporating bits from across franchise history. [[Anime/TransformersCybertron Four key macguffins that go into an "Omega Lock"]]?
** ''WesternAnimation/BeastWars'' introduced the concept of a robot soul called a Spark, all subsequent material have included this as a major component of the Transformer culture. This was even retroactively applied to all G1 characters, with the original Optimus Prime and Megatron having particularly powerful sparks able to upgrade the forms of Optimus Primal and Beast Wars Megatron.
*** An earlier concept of this was hinted at in Generation One, when two episodes referred to a "laser core." Once, the 'cons wanted to make sure Prime's was extinguished rather than assuming he was dead due to the damage he'd taken earlier; another time, Megs ordered Devastator to extiquish the Autobots' laser cores forever. This was very spark-esque (something in your chest that, if "extinguished," means you're [[KilledOffForReal dead-dead]] and not [[DisneyDeath cartoon dead]], and checking for this is the only way to be sure) and ''may'' have been in the back of the ''WesternAnimation/BeastWars'' writers' minds. However, there's no clear indication that they were aware of it when they conceived of the 'Spark' concept, and it ''was'' mentioned on those two occasions only.
** They also introduced Protoforms, though what they are can vary from the equivalent young, infant, or even prenatal Cybertronians, to simply a Cybertronians' basic form. (The movie toy packaging [[YouKeepUsingThatWord stands alone]] in using "Protoform" to mean "Cybertronian who hasn't scanned an Earth mode yet," which would make the ''entire'' casts of ''The War Within'' or ''War for Cybertron'' protoforms.) Not every series included them, but a lot did.
** IDW Publishing's Transformers series begins life as an updated retelling of G1, but bits of other versions begin to sneak in. These days, ''not'' using things like the units of time (cycle, megacycle, etc.) and what we know of Transformer biology (sparks, etc.) that ''WesternAnimation/BeastWars'' originated is unheard of. Also, by now, we've met Lockdown (Animated-original) and Grindcore (Movie comics original), quite a few characters from the Japan-only G1 sequels, and Omega Supreme uses his name as a BadassBoast (Animated Omega was the first to do that.)
*** To make a long story short, once any Transformers property introduces a character or concept, it becomes fair game for both new series and new versions of older series. In TheMultiverse, one Demolishor or Barricade or Omega Lock existing means that every universe ''probably'' has one that you just haven't met... yet.
[[/folder]]
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