History AdaptedOut / AnimeAndManga

** Koga's daughter (and Gym Leader successor) Janine,the only sequel Gym Leader, from ''VideoGame/PokemonGoldAndSilver'' never makes an appearance. The part of the game she's in requires visiting Kanto to get the region's badges; while Ash ''did'' return to Kanto to face off against the ''Hoenn'' Frontier Brains, he didn't visit the Gyms due to the fact that he'd already gotten the badges. Koga does get a [[CanonForeigner sister named Aya]], who pretty much fills the same role as Janine.

** The Team Rocket Executives - Proton, Ariana, Petrel, and Archer - have never appeared, either in their original designs or remake designs, despite Team Rocket being such an important aspect of the anime. Unlike Red in the games, Ash has not caused Team Rocket to disband[[note]]While Giovanni is usually the Viridian gym leader, whose defeat at the gym causes said disbanding, he conveniently leaves so [[TerribleTrio Jessie, James, and Meowth]] fight Ash in his place, and Team Rocket's continued presence is believed to be a symptom of the trio's EnsembleDarkhorse status making them part of the [[StrictlyFormula series formula]][[/note]] and thus neither [[VideoGame/PokemonGoldAndSilver Neo Team Rocket]] nor [[VideoGame/PokemonUltraSunAndUltraMoon Team Rainbow Rocket]] came to be.

** Zinnia, Lisia, and Aarune from ''Omega Ruby/Alpha Sapphire'' don't appear either.

* The anime for ''Manga/MissKobayashisDragonMaid'' completely cut out all of the cameos by other Creator/CoolKyouShinsha characters (with the exception of Frau Rabbit).

** A shocking moment in VideoGame/PokemonBlack2AndWhite2 is when the Purrloin stolen by Team Plasma is now a Liepard, loyal to the Shadow Triad. They do give it back to Hugh, but it takes some time for his sister to bond with it. This plot point is completely absent in the ''[=B2W2=]'' arc, with it having stayed as Purrloin by the time it reunites with Hugh's sister.

** A minor plot point is removed in the ''XY'' arc, where the activation of the Ultimate Weapon in-game is decided by a red and blue button in Lysandre Labs, which only turns out to be a SadisticChoice. There's no mention of the button anywhere in the arc.

** Orre only gets a vague reference from the Trick Master. This means that none of the ''VideoGame/PokemonColosseum'' or ''VideoGame/PokemonXDGaleOfDarkness'' characters cameo in the manga.

* ''Anime/PokemonGenerations'':

* ''VideoGame/DragonQuestV'' movie adaptation ''Anime/DragonQuestYourStory'' leaves Madchen -one of the Hero's twin children- out. Optional party member Tuppence is not included, either; his role in the party is effectively replaced with a friendly slime named Goo.

* In two manga adaptations of the ''VideoGame/FireEmblemGenealogyOfTheHolyWar'' games, different characters have been cut out:

** ''Anime/FullMetalAlchemistBrotherhood'', in comparaison, has its first half rushed out; meaning that the train miniarc and Bald are excluded.

** The Team Rocket Executives - Proton, Ariana, Petrel, and Archer - have never appeared, either in their original designs or remake designs, despite Team Rocket being such an important aspect of the anime. Unlike Red in the games, Ash has not caused Team Rocket to disband[[note]]While Giovanni is usually the Viridian gym leader, whose defeat at the gym causes said disbanding, he conveniently leaves so [[TerribleTrio Jessie, James, and Meowth]] fight Ash in his place, and Team Rocket's continued presence is believed to be a symptom of the trio's EnsembleDarkhorse status making them part of the [[StrictlyFormula series formula]][[/note]] and thus Neo Team Rocket or [[VideoGame/PokemonUltraSunAndUltraMoon Team Rainbow Rocket]] never came to be.

* ''VideoGame/DragonQuestV'' movie adaptation ''Anime/DragonQuestYourStory'' leaves Madchen -one of the Hero's twin children- out. Optional party member Tuppence is not included, either; his role in the party is effectively replaced with a friendly slime named Goo.

** Leaf,[[note]]From ''[[VideoGame/PokemonRedAndBlue Fire Red and Leaf Green]]'',[[/note]] Hilda and Hilbert,[[note]]from ''VideoGame/PokemonBlackAndWhite'',[[/note]] Nate and Rosa,[[note]]from ''VideoGame/PokemonBlack2AndWhite2'',[[/note]] Calem,[[note]]from ''VideoGame/PokemonXAndY''[[/note]] Elio and Selene[[note]]from ''VideoGame/PokemonSunAndMoon'' and ''VideoGame/PokemonUltraSunAndUltraMoon''[[/note]], and Victor and Gloria[[note]]from ''VideoGame/PokemonSwordAndShield''[[/note] do not show up at all despite being {{Player Character}}s from some of the games. Justifiable since Ash being the main protagonist of the series makes them kind of redundant as major characters or protagonists; some seasons of the anime have him wear clothes similar to those of many of the above characters.

** Leaf,[[note]]From ''[[VideoGame/PokemonRedAndBlue Fire Red and Leaf Green]]'',[[/note]] Hilda and Hilbert,[[note]]from ''VideoGame/PokemonBlackAndWhite'',[[/note]] Nate and Rosa,[[note]]from ''VideoGame/PokemonBlack2AndWhite2'',[[/note]] Calem,[[note]]from ''VideoGame/PokemonXAndY''[[/note]] and Elio and Selene[[note]]from ''VideoGame/PokemonSunAndMoon'' and ''VideoGame/PokemonUltraSunAndUltraMoon''[[/note]] do not show up at all despite being {{Player Character}}s from some of the games. [[note]]Justifiable since Ash being the main protagonist of the series makes them kinda not there as major characters or protagonists, some seasons of the anime have him wear clothes similar to those of many of the above characters.[[/note]]

** Characters from spinoff games rarely appear in the anime. The only ones who do are from ''VideoGame/PokemonSnap''[[note]]Todd actually ''did'' debut in the anime before ''Snap'''s release[[/note]] and the ''VideoGame/PokemonRanger'' series. The ''VideoGame/PokemonColosseum'', ''VideoGame/PokemonXDGaleOfDarkness'', ''VideoGame/PokemonTrozei'', and ''VideoGame/PokemonGo'' characters don't appear. This does not include the one-off ''VideoGame/PokemonMysteryDungeon'' specials.

** Game elements like Technical and Hidden Machines are never used in the anime, many Pokemon often already learn the moves on their own or are taught them with no mention of these machines.

** Cynthia's sister and grandfather are minor characters who doesn't have a sprite of their own, however they still appears in the games. In the anime, however, only Cynthia and her grandmother appeared.

** Zinnia, Lisia, and Aarune from ''Omega Ruby/Alpha Sapphire'' haven't made an appearance either.
** The Team Rocket Executives - Proton, Ariana, Petrel, and Archer - have never appeared, either in their original designs or remake designs, despite Team Rocket being such an important aspect of the anime. Unlike Red in the games, Ash has not caused Team Rocket to disband[[note]]While Giovanni is usually the Viridian gym leader, whose defeat at the gym causes said disbanding, he conveniently leaves so [[TerribleTrio Jessie, James, and Meowth]] fight Ash in his place, and Team Rocket's continued presence is believed to be a symptom of the trio's EnsembleDarkhorse status making them part of the StrictlyFormula[[/note]] and thus Neo Team Rocket or [[VideoGame/PokemonUltraSunAndUltraMoon Team Rainbow Rocket]] never came to be.
** The games feature various cellphone-like items, such as the C-Gear, which are [[DemotedToExtra usually ignored]] in the anime. WordOfGod is that that they would make the plots easy to work around (ie, if the plot has character split up then all they'd have to do is call each other). Misty had the original Poké Gear in one episode after her departure, Brock used the one from the remakes as a map throughout the ''Diamond & Pearl'' series, and Dawn had the Poketch. It wasn't until ''Journeys'' that Ash received the [[VideoGame/PokemonSwordAndShield Rotom Phone]] when he's assigned to do research alongside Goh.

** The Distortion World is the catalyst of ''Platinum'''s plot, but never appeared in the anime. ''Anime/PokemonGiratinaAndTheSkyWarrior'' instead used a [[SuspiciouslySimilarSubstitute very similar]] (yet noticeably different) area called the "Reverse World".

** Professor Sycamore's recurring assistants Sina and Dexio didn't appear in the anime, however one of Team Rocket's [[PaperThinDisguise Paper-Thin Disguises]] is inspired by their ''Sun & Moon'' clothing.

** The Survival and Fight Areas in ''Diamond and Pearl'' never showed up in the anime, however the Resort Area and its unusually strong Magikarp made an appearance in the ''Journeys'' anime.

** Red in the games has a mother who appears in two different pairs of games (the Kanto and Johto ones) and has an off-screen father. Red in ''Adventures'' however either suffers from a mean case of InvisibleParents or outright ParentalAbandonment. He is one of the only, if not the only, Pokedex holder with no known relatives.

* ''Anime/{{Pokemon}}'':

** Orre is never referenced. This means that none of the ''VideoGame/PokemonColosseum'' or ''VideoGame/PokemonXDGaleOfDarkness'' characters cameo in the manga.

* The various animated ''Franchise/LupinIII'' productions tend to very loosely (if ''at all'') adapt the [[Manga/LupinIII original manga]], so a ton of characters were left out. For instance, the manga chapter that was adapted into episode 12 of [[Anime/LupinIIIGreenJacket the first anime]] featured Fujiko and her sister Michi, while the TV version just had Fujiko. Recurring villain Pycal also had a wife who appeared as the antagonist of one chapter, but the anime adaptation gave her role to a new male villain named Volvo.

* The {{OVA}} of ''Manga/JojosBizarreAdventureStardustCrusaders'' cut out a bunch of Dio's acolytes, including Gray Fly, Steely Dan, Mannish Boy, Terence T. D'Arby, Captain Tenille, Devo the Cursed, and Pet Shop.

* ''Manga/YuGiOh'': The anime version removed Otogi’s dad in favor of making Otogi [[AdaptationPersonalityChange more different.]]

* ''VideoGame/DragonQuestV'' movie adaptation ''Anime/DragonQuestYourStory'' leaves Madchen -one of the Hero's twin children- out.

** Leaf,[[note]]From ''[[VideoGame/PokemonRedAndBlue Fire Red and Leaf Green]]'',[[/note]] Hilda and Hilbert,[[note]]from ''VideoGame/PokemonBlackAndWhite'',[[/note]] Nate and Rosa,[[note]]from ''VideoGame/PokemonBlack2AndWhite2'',[[/note]] Calem,[[note]]from ''VideoGame/PokemonXAndY''[[/note]] and Elio and Selene[[note]]from ''VideoGame/PokemonSunAndMoon'' and ''VideoGame/PokemonUltraSunAndUltraMoon''[[/note]] do not show up at all despite being {{Player Character}}s from some of the games. [[note]]Justifiable since Ash being the main protagonist of the series makes them kinda not there as major characters or protagonists.[[/note]]

** Sinnoh and Johto's Frontier Brains other than Palmer and Caitlin[[note]]albeit in her Unova Elite Four incarnation[[/note]] do not appear.

** AZ and the Ultimate Weapon do not play a role in the anime's version of Team Flare's plot.

** Game elements like Technical and Hidden Machines are never used in the anime.

** The Team Rocket Executives - Proton, Ariana, Petrel, and Archer - have never appeared, either in their original designs or remake designs, despite Team Rocket being such an important aspect of the anime. Unlike Red in the games, Ash has not caused Team Rocket to disband and thus Neo Team Rocket or [[VideoGame/PokemonUltraSunAndUltraMoon Team Rainbow Rocket]] never came to be.

* The various animated ''Franchise/{{Lupin III}}'' productions tend to very loosely (if ''at all'') adapt the [[Manga/{{Lupin III}} original manga]], so a ton of characters were left out. For instance, the manga chapter that was adapted into episode 12 of [[Anime/LupinIIIGreenJacket the first anime]] featured Fujiko and her sister Michi, while the TV version just had Fujiko. Recurring villain Pycal also had a wife who appeared as the antagonist of one chapter, but the anime adaptation gave her role to a new male villain named Volvo.

* Shizuna Minamoto is absent from Creator/StudioShaft's anime adaptation of ''Manga/MahouSenseiNegima'' and Mr. Takahata pretty much takes over her parts in addition to his own. Kotaro Inugami joins the cast in the manga as Negi's best friend; however, he makes no appearance in either anime series.

* ''Anime/OnegaiSamiaDon'' is an AnimatedAdaptation of the book Literature/FiveChildrenAndIt, but the eldest daughter Althea isn't included in the series and CanonForeigner Anne Hopkins takes her in-story spot.

* Keiichi didn't show up in the ''Manga/{{X1999}}'' anime. The three main characters of CLAMP School Detectives didn't appear in the anime as well (probably due to copyright reasons since ''Manga/CLAMPSchoolDetectives'' is animated by a different studio), but the chairman of CLAMP School looked similar to Nokoru Inomoyama except he has a PornStache.

** The games feature various cellphone-like items, such as the C-Gear, which are [[DemotedToExtra usually ignored]] in the anime. WordOfGod is that that they would make the plots easy to work around (ie, if the plot has character split up then all they'd have to do is call each other). Misty had the original Poké Gear in one episode after her departure, Brock used the one from the remakes as a map throughout the ''Diamond & Pearl'' series, and Dawn had the Poketch. It wasn't until 2019 that Ash received the [[VideoGame/PokemonSwordAndShield Rotom Phone]] when he's assigned to do research alongside Go in the new series.

* The featureless player character from ''VideoGame/KantaiCollection'', The Admiral, was not made into a leading character or someone with known features in [[Anime/KantaiCollection the Anime]]; he is an unseen figure instead, mentioned offhand by others, taking a different approach from other [[AnimatedAdaptation Anime Adaptations]] of popular works like ''Anime/TheIdolmaster'' and ''Anime/SuperSonico'', where The Producer and The Manager were given features and sufficient characterization.

** Freida, the LonelyRichKid Myne eventually befriends, is established to have parents, two older brothers, at least one aunt and at least one uncle. They don't appear in the anime mostly because Freida and her grandfather, around whom she spends a lot of time anyway, are the two only members of the family with any real relevance to the overreaching plot.

* The short-lived manga adaptation of ''Anime/DemashitaPowerpuffGirlsZ'' omitted pretty much every major Powerpuff Girls villain except for Mojo Jojo and Princess.

** The novel has a period during which Myne is left with a babysitter named Greda between the period where she's too sick to leave home and the period during which she helps Otto, the city gate's main paperwork handler. The period during which Myne is left with Greda was cut from the anime. This results in a change in the anime version of the scene in which Myne makes baskets despite the fact nobody in her family taught her, as in its novel version, her cover story is that Greda taught her.