History Main / AdaptationExplanationExtrication

* The 2011 adaptation of ''Manga/HunterXHunter'' cuts out Kite's appearance and any mentions of him in the story (safe for his [[FreezeFrameBonus blink-and-you’ll-miss-it silhouette in the first episode’s narration]]) and his backstory with Gon is shortened, showing that he saved Gon from a foxbear attack. In the manga and 1999 anime, Kite became a father figure to Gon, is the one who revealed the truth about Ging, and is the reason why Gon wants to be a hunter to find Ging, which Gon repeatedly mentions in the story. Gon and Killua joining Kite and his team for 1 month exploring the Kakin Fauna is even removed so Gon's seemingly powerful attachment to Kite and [[spoiler:rage over his death]] looks like it came out of nowhere in the [[{{Creator/Madhouse}} Madhouse]] anime.

* ''WesternAnimation/JusticeLeagueTheFlashpointParadox'' ends just like the original ''Comicbook/{{Flashpoint}}'' comic, with [[spoiler:Franchise/TheFlash rebooting history into the ComicBook/{{New 52}} timeline.]] However, the movie omits ''how this is possible'', since in the original comic, this was caused by [[spoiler: Pandora tricking the Flash into merging Franchise/TheDCU with the Creator/{{Vertigo|Comics}} and Creator/{{Wildstorm}} universes]]. Both [[spoiler: Pandora and the merger sequence]] ended up AdaptedOut, so there's no explanation given as to why [[spoiler: Flash and Batman suddenly have new costumes at the end of the film, besides the implied possibility of ForWantOfANail]].

* ''Anime/RWBYIceQueendom'': Jaune's original character arc is cut from this spin-off, as a result, certain things about him and Team JNPR are included, but the context has been lost. It's a plot-point that his Aura is exceptionally untrained for a Huntsman student, he is shown to have great doubts about abilities that are sub-par compared to other students, and his team-mates are close enough to him to rescue him from the Nightmare Grimm. However, the arc that establishes why he's so untrained and how he bonds with his team is cut. Although he is given a replacement character growth arc in the anime, these things are never explained.

* ''Anime/RWBYIceQueendom'': By having a good amount of episodes of the original RWBY's Season 1 being AdaptedOut in "A Nightmare Comes", there are some things that simply come off as confusing since any context is not given:
** Jaune's aura is noted to be exceptionally weak for a Huntsman, and he is shown having severe doubts in himself which is brought on by the Nightmare Grimm. However, by the series skipping over important notes such as the fact Jaune both cheated his way into Beacon (and therefore was not at a level to enter) and that he hadn't even discovered how to use his aura until Pyrrha helped him, it can leave viewers confused as to why Jaune is at such a disadvantage compared to his peers.
** Likewise, the moment of JNPR coming to save Jaune from his Nightmare Grimm coming soon after the teams had been formed leaves it a question as to whether they were close enough to even save their leader considering how quickly events unfolded, in contrast with the original show, which showed the team bonding and Jaune confessing his secrets to the others as a sign of his personal growth.
** Lastly, Penny's attack on Roman and the White Fang comes off as odd due to the episode skipping out the scenes of Roman hurting Ruby which then caused Penny's rampage to begin with.

** How did Kaiba get a helicopter in the anime? In the manga, Kaiba is not on the run from Pegasus's goons and simply has his pilot fly him to the island. The pilot turns out to be working for Pegasus and attacks him, forcing Kaiba to hijack the helicopter and fly it himself.
** Where did Ryo Bakura get his Millennium Ring back at the beginning of the Millennium World arc in the anime? In the manga, he found it in Yugi's room at the end of Battle City.

** In the manga it's mentioned that Trisha died of an illness going around. In the [[Anime/FullmetalAlchemist 2003 anime]], her illness isn't discussed, besides it being mentioned that it was likely a long-term illness.

* ''LightNovel/ShakuganNoShana'':

* The anime of ''LightNovel/SwordArtOnline'' is a largely faithful adaptation of the light novels, with one exception: Kirito's InnerMonologue is removed almost completely. While there are a few important plot points that become confusing due to this omission, mostly we just lose a few jokes. Internally, he makes constant game references, reveals that he wears mostly black due to a simple fanboyish belief that black is cool, continues using Liz's sword [[NamedWeapons Dark Repulsor]] simply because he thinks the name ''dark repulsor'' means the sword is fated to defeat the final boss, and that he memorized a number of placating lines for if he ever found himself in an AccidentalPervert situation (and promptly forgot them when it actually happened).

* The ''LightNovel/SwordArtOnlineAlternativeGunGaleOnline'' anime doesn't mention that Karen "LLENN" Kohiruimaki's family is very well-off. As such a few things, such as how Karen can afford to try out so many games before settling on GGO, [[FriendsRentControl the size of her apartment]] (it's explicitly said to be a luxury apartment), and why she flies first-class to and from her home in Hokkaido, make a bit less sense than they would otherwise.

* In the first light novel, ''LightNovel/{{Toradora}}'' has a bit of a digression into a tall tale from Yasuko about how she's a "mini-[[PsychicPowers esper]]" and can [[PsychicTeleportation teleport]] three times in her life; she says she's used up two of them, and [[ItOnlyWorksOnce Ryuuji can have the third time]]. He almost thinks he did, getting to Taiga in time to catch her from a bad fall. In the anime, well, he just catches her, and the "wait, what now?" moment of paranormality (which is never referenced again) is ignored.

* When ''WesternAnimation/IronMan'' did an adaptation of the iconic "Armor Wars" story arc, they left in the sequence where Iron Man attacks Stingray, which leads to a MyGodWhatHaveIDone moment. In the comics, the fight was significant because Iron Man had assaulted a friend and fellow [[Comicbook/TheAvengers Avenger]], but in the show, Stingray had never appeared before the "Armor Wars" story, and there was no indication that the two men even knew each other. Thus, it's not necessarily clear to the audience why Tony views it as crossing the MoralEventHorizon unless they're familiar with the comics.

* ''Manga/ShamanKing'': The 2021 anime skips the chapter that introduces the mortuary tablets, but unlike the 2001 anime, it doesn't incorporate it's introduction into the anime, so their presence and usage are never explained.

* The 2011 adaptation of ''Manga/HunterXHunter'' cuts out Kite's appearance and any mentions of him in the story and his backstory with Gon is shortened, showing that he saved Gon from a foxbear attack. In the manga and 1999 anime, Kite became a father figure to Gon, is the one who revealed the truth about Ging, and is the reason why Gon wants to be a hunter to find Ging, which Gon repeatedly mentions in the story. Gon and Killua joining Kite and his team for 1 month exploring the Kakin Fauna is even removed so Gon's seemingly powerful attachment to Kite and [[spoiler:rage over his death]] looks like it came out of nowhere in the [[{{Creator/Madhouse}} Madhouse]] anime.

* The 2011 adaptation of ''Manga/HunterXHunter'' cuts out Kite's appearance and any mentions of him in the story and his backstory with Gon is shortened, showing that he saved Gon from a foxbear attack. In the manga, Kite became a father figure to Gon, is the one who revealed the truth about Ging, and is the reason why Gon wants to be a hunter to find Ging, which Gon repeatedly mentions in the story. Gon and Killua joining Kite and his team for 1 month exploring the Kakin Fauna is even removed so Gon's seemingly powerful attachment to Kite and [[spoiler:rage over his death]] looks like it came out of nowhere in the [[{{Creator/Madhouse}} Madhouse]] anime.

* The ''Manga/{{Negima}}: Another World'' {{OVA}}s don't even bother to explain the whole [[OvernightAgeUp age-changing pills]] deal, confusing viewers who see Chisame and Chachamaru are now lolis... just because.

* The 2011 adaptation of ''Manga/HunterXHunter'' cuts out Kite's appearance and any mentions of him in the story and his backstory with Gon is shortened, showing that he saved Gon from a foxbear attack. In the manga, Kite became a father figure to Gon, is the one who revealed the truth about Ging, and is the reason why Gon wants to be a hunter to find Ging, which Gon repeatedly mentions in the story. Gon and Killua joining Kite and his team for 1 month exploring the Kakin Fauna is even removed so Gon's seemingly powerful attachment to Kite and [[spoiler:rage over his death]] looks like it came out of nowhere in the anime.

* ''Manga/ShamanKing'': The 2021 anime skips the chapter that introduces the mortuary tables, but unlike the 2001 anime, it doesn't incorporate it's introduction into the anime, so their presence and usage are never explained.

** In ''Manga/JojosBizarreAdventureDiamondIsUnbreakable'', Okuyasu's father was a servant of [[GreaterScopeVillain DIO]]'s, complete with a [[BrainwashedAndCrazy flesh bud implanted into his head]]; when [[Manga/JojosBizarreAdventureStardustCrusaders DIO was killed in 1988]], the flesh bud [[BalefulPolymorph mutated him into a hideous frog-like creature]]. The LiveActionAdaptation tries to be its own self-contained story and avoids referencing the other story arcs, so the only explanation we're given for Nijimura's transformation is his older son Keicho suggesting that it was LaserGuidedKarma for his being a [[DomesticAbuse terrible]] [[AbusiveParents person]].

** One of the main complaints about ''Shakugan no Shana Final'' was the LoadsAndLoadsOfCharacters that appeared out of nowhere. Many of these characters should have appeared or at least been mentioned in seasons 1 and 2, but the short stories they debuted in were never adapted to the anime.

** In the 2003 anime, Ishvalans have dark skin and red eyes, but their hair is brown or black. In the manga, Ishvalans have white hair on top of having dark skin and red eyes. Scar is the one young Ishvalan who keeps his white hair. As a child he had black hair but it lightened for reasons unspecified. It was grey even was ''before'' the Ishvalan massacre, so it's unlikely to be [[PrematurelyGreyHaired due to stress]].

* ''WesternAnimation/XMen:'' Cyclops and Havok being immune to each-other's powers. While it was evident the writers were laying the groundwork for a reveal down the line of them discovering they were long lost brothers, they never got around to putting it in the series.

* In ''Animation/TheMysteryOfTheThirdPlanet'', like in the [[Literature/TheVoyageOfAlice book it is based on]], the pirates are after the formula of the absolute fuel. In the book, it’s explained that the absolute fuel is a fuel that makes spaceships a hundred times faster; the Third Captain brings it from another galaxy after becoming the first Milky Way resident to travel there, and he only shares its formula with the Second Captain before both are captured by the pirates. However, in the movie, it’s all omitted (and the Third Captain is AdaptedOut completely), so it’s left unclear what the absolute fuel even is and why only the Second Captain knows its formula.

* In ''Animation/TheMysteryOfTheThirdPlanet'', like in the [[Literature/TheVoyageOfAlice book it is based on]], the pirates are after the formula of the absolute fuel. In the book, it’s explained that the absolute fuel is a fuel that makes spaceships a hundred times faster; the Third Captain brings it from another galaxy after becoming the first Milky Way resident to travel there, and he only shares it with the Second Captain before both are captured by the pirates. However, in the movie, it’s all omitted (and the Third Captain is AdaptedOut completely), so it’s left unclear what the absolute fuel even is and why only the Second Captain knows it.

** In ''Web of Shadows'', the six small Rahaga and the villains clearly have a history with each other, but this goes unexplained. Roodaka bursts from anger upon hearing that the Rahaga showed up and her getting them abducted them is a huge turning point in the point. Roodaka's partner Sidorak wants them caged, not killed. All other story material, including the film's novelization explains their shared past (the Rahaga used to serve the same organisation as Roodaka and Sidorak but rebelled when their masters turned evil, Roodaka then mutated them into small freaks but they escaped) and even bonus material included on the DVD somewhat references it, but the movie doesn't elaborate. The reason they wanted them alive, to make them reveal where they hid the Mask of Light, isn't brought up either in the final film.

* When [[SickEpisode The twenty-third chapter]] of ''Manga/AsteroidInLove'' is adopted into the latter half of the seventh episode of the AnimatedAdaptation, the reason why Ao got sick in the first place is removed. In the manga, after her mother [[spoiler:discusses with Ao about Ao's father's job transfer,]] Ao [[spoiler:falls into a HeroicBSOD and]] sat in the bath for ''three'' hours, and gets sick from it. In the adaptation, her mother discusses with Ao on an unspecified matter, and on the next day finds her calling in sick. The thing about the bath is only raised as an off-hand comment. There is a purpose to it--to increase the impact of the following episode's WhamLine.

* ''Anime/TheIdolmaster'': Some events in the anime series make a lot more sense if you've played through the game and unlocked the backstories for the idols.
* ''Manga/JojosBizarreAdventure'':

** In ''Manga/JojosBizarreAdventureDiamondIsUnbreakable'', Okuyasu's father was a servant of [[GreaterScopeVillain DIO]]'s, complete with a [[BrainwashedAndCrazy flesh bud implanted into his head]]; when [[Manga/JoJosBizarreAdventureStardustCrusaders DIO was killed in 1988]], the flesh bud [[BalefulPolymorph mutated him into a hideous frog-like creature]]. The LiveActionAdaptation tries to be its own self-contained story and avoids referencing the other story arcs, so the only explanation we're given for Nijimura's transformation is his older son Keicho suggesting that it was LaserGuidedKarma for his being a [[DomesticAbuse terrible]] [[AbusiveParents person]].

* ''VideoGame/SplinterCell: Double Agent'' contains a variant example. The[[UsefulNotes/Playstation3 PS3]], PC, and UsefulNotes/Xbox360 versions had an entire sub-plot surrounding a budding romance between Sam and Enrica. This subplot was missing from the [[PragmaticAdaptation considerably different]] version released to [[UsefulNotes/PlayStation2 PS2]], UsefulNotes/NintendoGamecube, and original UsefulNotes/XBox, [[spoiler: leading to an AdaptationInducedPlotHole when Sam abruptly becomes so protective of Enrica and no other JBA members when ordered to kill them in the final mission.]]

* ''Anime/HowlsMovingCastle:''
** In both the film and the book, Sophie decides to stay at her hat shop as the eldest child. In the book, it's because she's WrongGenreSavvy about YoungestChildWins. In the movie, she simply says she's staying because she's the eldest--leaving the audience to assume something involving inheritance or a misguided sense of responsibility, possibly.
** At the end of both, [[spoiler:when she has to return Howl's heart,]] she wants to know if Calcifer will still be alright. He says he will. In the book, it's explicitly because [[spoiler:Sophie can imbue things with magical powers just by talking to them, so she gave Calcifer a life of his own outside of Howl's heart.]] In the movie, it's {{Hand Wave}}d with Calcifer simply thinking Sophie is special somehow.
** In the movie, there is a peculiar and extremely intelligent dog that follows Sophie around. The dog was extremely significant in the book, but all of its plot relevance was shuffled into a minor book character, and it was left in the movie as just a weird dog.
** The book has a very clear explanation for Howl's mysterious background and odd personality quirks, [[spoiler:He's from Wales in the 1980s.]] In the movie, this is totally ignored.

[[folder:Fanfiction]]

* ''Recap/DiaryOfAnAnalog'': The plot point of the Crests attributed to the 1999 [=DigiDestined=] being given up to free the Sovereigns in 2000 just after the Diablomon conflict never comes up in its original form, especially considering the 1999 kids are re-established here as having outgrown the need for the Crests to Digivolve beyond Champion as what happened in the FinalBattle of ''Anime/DigimonAdventure''. As a result, unlike canon ''Anime/DigimonAdventure02'', the 1999 [=DigiDestined=] have full access to any form of theirs above Champion, to the point that the entire premise is literally T.K. and Patamon trying to achieve Mega Level on their own in-order to become more independent of Matt and Gabumon.

* ''VideoGame/LEGOJurassicWorld'': The section adapting ''Jurassic Park III'' includes the arrival of TheCavalry at the end, but leaves out everything that explains who called them in and how they knew where to go.