History Main / AdaptationalExplanation

* ''Series/OnePiece2023'' does this for the map of the Grand Line. In [[Manga/OnePiece the manga]], the map, as well as the conflict against Buggy to get it, is a case of EarlyInstallmentWeirdness, as not only would it later be established that Buggy is already be familiar with the region, the idea that there's a complete and useful map of the Grand Line is completely laughable. In this show, the value of the map is instead implied to come in the form of giving the topography of Reverse Mountain, the treacherous route that the Grand Line is entered from.

** The film implies that Queen Aislinn had a loveless marriage to King Freyne, which led to a troubled relationship with their soon Einon, but never goes deeper into it. The novelization reveals Freyne was a dragonslayer (also explaining how Draco knows of him) who claimed her as a bride of conquest since he only coveted her beauty and slaughtered Aislinn's dragon-loving people. The union left Aislinn unable to love Einon, making it easy for Freyne to corrupt the prince and make Einon a tyrant like himself or worse.

* ''Theatre/PinocchioTheMusical'' gives an explanation to Pinocchio's ability to be alive even though he's a wooden puppet: he was a very ancient pine tree that was struck by lightning and fell down, and was given a second chance of life by the Blue Fairy (who is an AntropomorphicPersonification of the moon in this adaptation).

** Interestingly, the live-action adaptation itself has this trope occur, too. Here, the Beast's library contains a magical PortalBook that allows the reader to travel to any location just by thinking about it. The Beast explains that the Enchantress left it as a "cruel trick"--even though he could technically leave at any time, he would still look like a hideous monster and be shunned wherever he goes. That's all well and good...until Belle discovers that Maurice is ill and the Beast decides to allow her to leave the castle to go to him, which is proof that he loves her. Unfortunately, the presence of the Portal Book leaves audiences wondering why Belle simply didn't use it to warp to Maurice instantly, then travel back to the castle with him. That question is answered in another adaptation: ''The Beast's Tale'', the [[AllThereInTheManual official manga]]. It's explained that only the Beast can make the book's magic work, meaning he would have to travel with Belle directly into her village to rescue Maurice, which would likely lead to all three being attacked or even killed.
** Similarly, the film explains specifically why the servants were also cursed alongside their master. The original movie never went into any detail about this, making it seem as if she simply did this for no reason. The movie outright clarifies that the servants think they were cursed specifically for failing to curtail their master's behavior when he was a child, allowing his cruel father to mold him into a monster.
** The original movie has no explanation for why Belle's mother is nowhere to be seen. This movie explains that she died of the plague.
* ''Film/Cinderella2015'' gives an explanation for why Lady Tremaine hates Cinderella. It's because she lost her two husbands and is simply trying to support her two daughters.

* ''Literature/Fahrenheit451'': In the movie, Montag explains to Clarisse that firemen wear a helmet with the number "451" because Fahrenheit 451 is the temperature at which book paper catches fire. This is never explained in the book and is instead said in the book's {{tagline}}.

** In the books, students at Hogwarts tend to be referred to according to their houses ("a first-year Gryffindor" or "a third-year Ravenclaw" and so forth), even though the books are meant to be told from Harry's perspective, and Harry isn't in a position to be keeping track of which house each and every student belongs to. In the films, the Hogwarts robes are given [[ColorCodedForYourConvenience color-coded scarves and neckties corresponding to the four houses]], meaning anyone can tell which one a student belongs to just by looking at them.
** ''Film/HarryPotterAndTheChamberOfSecrets'' explains why Harry couldn't use Parseltongue to communicate with the basilisk when he fought it in the chamber. In the book, he never even tried for no adequately explored reason, but in the film, Riddle immediately dissuades him from doing so by telling him that the basilisk will only obey the Heir of Slytherin. The book does explain that according to legend, "the Heir of Slytherin alone" can control the monster, but that was probably because no-one but the heir was expected to be able to speak Parseltongue.
** ''Film/HarryPotterAndThePrisonerOfAzkaban'': In the book, Harry casting the Patronus he'd initially attributed to his father was the result of a random EurekaMoment on his part. The film adds in other cases of future characters influencing past events (Hermione throwing the rocks into Hagrid's hut and howling to distract Lupin in his werewolf form), so that there was a solid basis for his realization there.

* ''Anime/AceAttorney'': This happens in "Reunion, and Turnabout" (the second case of ''Justice for All''). In the case, Phoenix's friend, Maya, who is a spirit medium, is accused of murdering her client while being possessed by a spirit she was supposed to channel. Turns out [[spoiler:the girl she was supposed to channel, Mimi Miney, was actually alive and killed the client to keep it a secret, while Maya's [[EvilAunt aunt Morgan]], whose help was necessary to pull this off, wanted Maya framed to get the position of the master of their clan.]] This, however, leads to FridgeLogic: [[spoiler:While Mimi had much to lose if it was found out she was alive, it wasn't as much as a sentence for murder, and if she didn't know what kind of person Morgan was, how did she know she wouldn't turn her over to the police the moment she asked her for help with the murder?]] The anime version of events explains this: [[spoiler:She didn't. Mimi's plan was to bribe Morgan into faking the channeling and it was ''Morgan'' who made Mimi into an accomplice by threatening to reveal the fact that Mimi was alive. Since Morgan knew that Mimi was desperate to keep it a secret, she knew Mimi would comply]].

* In ''Literature/{{Dracula}}, while it is implied Dracula massacred the crew of the Demeter, there is enough evidence to suggest he was innocent and one of the crew did it instead. ''Film/TheLastVoyageOfTheDemeter'' removes any ambiguity by showing Dracula attacking the ship's livestock and crew.

* ''Franchise/{{Discworld}}'': The short story "Troll Bridge" ends with Cohen holding a piece of paper containing three addresses, despite the fact that -- as established in ''Literature/{{Sourcery}}'' and ''Literature/TheLastHero'' -- he can't read. The Snowgum Films adaptation reveals in its closing theme that his SapientSteed ''can'', and tells him where to go.

* Jim Sangster's ''Literature/DoctorWhoNovelisations'' style [[https://escapetodanger.net/tag/dimensions-in-time/ adaptation]] of "[[Recap/DoctorWho30thASDimensionsInTime Dimensions of Time]]" comes up with explanations for most aspects of something that was pretty close to a RandomEventsPlot, including why the Rani chooses Albert Square for her scheme, which plays on the nature of ''Series/EastEnders'':

* In ''Manga/JojosBizarreAdventureStardustCrusaders'', it's never explained how the imposter Captain Tennile was able to KillAndReplace the real captain without his crew noticing. In ''[[https://archiveofourown.org/works/34709092/chapters/92755081#workskin from porcelain to ivory to steel]]'', the imposter is actually the real Captain Tennile's EvilTwin, killing his own brother while the ship was out at sea.

* ''Film/Fahrenheit451'': In the movie, Montag explains to Clarisse that firemen wear a helmet with the number "451" because Fahrenheit 451 is the temperature at which book paper catches fire. This is never explained in the book and is instead said in the book's tagline.

** Chief among them is how come [[WesternAnimation/ThePowerpuffGirls1998 Blossom, Bubbles, and Buttercup]] have glass windows to their bedroom in some episodes but do not in others. Due to the 3D environment that makes up CN Cities' Bumpers; one such Bumper showed the girls flying home through their windows: which are revealed to be on a swivel joint similar to a revolving door that the girls fly through.

* ''Series/TheLastOfUs'': The original game doesn't explain why the infected react violently to the uninfected to the point of killing them, a contradiction for a parasite whose literal life goal is [[YouWillBeAssimilated to spread to new hosts]]. The TV series has the infected become violent only when they find ''opposition'' to the spread; if someone undergoes a HeroicBSOD and allow themselves to be infected, the infected will gently oblige it.

* ''Series/TheLastOfUs'': The original game doesn't explain why the infected react violently to the uninfected to the point of killing them, a contradiction for a parasite whose literal life goal is [[YouWillBeAssimilated to spread to new host]]. The TV series shows that the infected become violent when they find ''opposition'' to the spread; if someone undergoes a HeroicBSOD and just let themselves be infected, the infected will gently oblige it.

* ''Series/TheLastOfUs'': The original game doesn't explain why the infected react violently to the uninfected to the point of killing them, an apparent contradiction for an parasite whose literal life goal is to spread to new hosts. The TV series shows that the infected become violent when they find ''opposition'' to the spread; if someone is to undergo a HeroicBSOD and just let themselves be infected, the infected will gently oblige it.

* ''WebAnimation/TurnaboutJackpot explains why the Jurist System, a major part of ''[[VisualNovel/ApolloJusticeAceAttorney Apollo Justice]]'''s climax, isn't around for ''[[VisualNovel/PhoenixWrightAceAttorneyDualDestinies Dual Destinies]]''. Basically, the rampant corruption that defines "the Dark Age of the Law" is so entrenched among the higher-ups of the legal system that they feared the wider implementation of the Jurist System, thus they buried its future under a pile of red tape.

** It's never explainded why the marines that stuffed Gordon in the trash compactor in "Residue Processing" never checked to MakeSureHesDead. Here, examining the control room of the compactor reveals one marine as a Headcrab zombie and the other reduced to LudicrousGibs, implying that Headcrabs teleported into the room and attacked them, with one marine accidentally blowing himself up with a grenade in panic.

** In ''VideoGame/KingdomHeartsII'', Gaston does not appear in Beast's Castle despite being the BigBad of ''WesternAnimation/BeautyAndTheBeast''. [[https://www.fanfiction.net/s/13713585/131/Super-RWBY-Gaiden In Chapter 131 of Super RWBY Gaiden]], after [[WesternAnimation/Pete]] fishes Gaston out of the [[WesternAnimation/Hercules River Styx]], Gaston explains to Maleficent that he was on the verge of killing the Beast but was done in by a guy in a black cloak. A flashback shows that Xaladin had arrived and blown away the angry mob, blocked Gaston's blunderbuss shot with his spears (after the former said Xaladin was pretty good with the wind) and then threw a spear through Gaston's chest, killing the hunter instantly.

* In ''VideoGame/PaperMario64'', it's never explained what the [[GiantSpaceFleaFromNowhere Big Lantern Ghost]] is doing in Shy Guy's Toy Box. In [[https://www.fanfiction.net/s/12700364/1/Paper-RWBY Paper RWBY]], he's working for General Guy, going by his dialogue: