History AdaptedOut / AnimeAndManga

** The post-League Battle Zone from ''Diamond, Pearl, and Platinum'' doesn't appear until ''Journeys'', when Ash and Goh visit Resort Area with its unusually strong Magikarp. The Battle Area and Fight Area still haven't been seen, and Stark Mountain is only mentioned by Buck in one episode.
** Galar Gym Leaders Milo, Kabu, Nessa, Gordie and Melony don't appear in the anime. The rival Bede doesn't appear either.

** ''[[Manga/MagicalGirlLyricalNanohaInnocent INNOCENT]]'' did this with the entire casts of ''[=ViVid=]'' and ''Force''. In ''[=ViVid=]'s'' case, it'd be difficult to have Vivio running around when her mother is currently 9 in this continuity. With ''Force'', it probably has more to do with the fact that the season as a whole is almost universally ''[[FanonDiscontinuity despised]]''. Everyone related to the Saint Church is also absent which means that Sein, Otto, and Deed never show up, even though all 9 other Numbers (including [[SparedByTheAdaptation Due]]) are present.
*** [[spoiler:Vivio and Einhart do show up later on via time travel.]]

** Game [[TheRival rivals]], Wally[[note]]though Drew has aesthetic similarities and is May's rival, [[DecompositeCharacter while]] Max covers the {{Kid Appeal|Character}}, the student-to-the-Player role, and being close to a Ralts (despite not catching it)[[/note]], and Hugh are completely absent. Silver is mostly absent, but makes a very brief cameo in a special and got an expy in Paul during the ''Diamond and Pearl'' saga.[[note]]For completeness, Brendan and Lucas [[DemotedToExtra also appear only in cameos in the movies]]; as does Ethan for those who don't count [[Anime/TheLegendOfThunder Jimmy]].[[/note]] Cheren didn't appear as a rival but appeared as his Gym Leader incarnation in ''VideoGame/PokemonBlack2AndWhite2''; this means he and Bianca are different ages and don't know each other at all in the anime. Bede, Klara and Avery don't appear in the anime either.

** History lists that Hurrem and Suleiman had six children together, with Abdullah being their fourth. He was born after Mihrimah, but before Selim, and is assumed to have been Mihrimah's (Irish) twin because their births occured in the same year. However, Abdullah died of disease at age 3 in 1525. The manga adapts Abdullah out entirely, leading to Selim being the third child Hurrem and Suleiman have.

* Masaki, along with the Akasaka ''Manga/WanganMidnight'' story arc he was featured in, was completely gutted out from TV anime.

** Galar Gym Leaders Milo, Kabu, Nessa, Gordie and Melony don't appear in the anime.

* In ''LightNovel/SwordArtOnlineAlternativeGunGaleOnline'', Karen "LLENN" Kohiruimaki is said to have a few siblings, with her oldest sister having a husband and a young daughter. While these characters are sometimes mentioned in the light novels, and Karen's sister and niece appear after her real life meeting with M in Volume 2, they are never even mentioned in the anime.

* In the anime adaptation of ''LightNovel/TrinityBlood'', many characters from the novels (such as some members from the Vatican and Rosenkreuz Orden) do not appear while some have their roles reduced though some of them do appear in the manga.

** 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 too easy to work around (i.e. if the plot has characters split up then all they'd have to do is call each other). Misty had the original PokéGear in one episode after her departure, Brock used the one from the remakes as a map throughout the ''Diamond & Pearl'' series, and Dawn had a Pokétch. It wasn't until ''Journeys'' that Ash received the [[VideoGame/PokemonSwordAndShield Rotom Phone]] when he's assigned to do research alongside Goh.

** 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.

** Game [[TheRival rivals]], Wally[[note]]though Drew has aesthetic similarities and is May's rival, [[DecompositeCharacter while]] Max covers the {{Kid Appeal|Character}}, the student-to-the-Player role, and being close to a Ralts (despite not catching it)[[/note]], and Hugh are completely absent. Silver is mostly absent, but makes a very brief cameo in a special and got an expy in Paul during the ''Diamond and Pearl'' saga.[[note]]For completeness, Brendan and Lucas [[DemotedToExtra also appear only in cameos in the movies]]; as does Ethan for those who don't count [[Anime/TheLegendOfThunder Jimmy]].[[/note]] Cheren didn't appear as a rival but appeared as his Gym Leader incarnation in ''VideoGame/PokemonBlack2AndWhite2''; this means he and Bianca are different ages and don't know each other at all in the anime.

* In the ''VisualNovel/{{Clannad}}'' VisualNovel, Kappei was actually an important (if late introduced) character with his own ending and everything, but so far has not appeared in any ''Clannad'' anime adaptation ever. This is lampshaded over a decade later in ''Anime/Kaginado'' where he ''does'' make an animated appearance.

* In the ''VisualNovel/{{Clannad}}'' VisualNovel, Kappei was actually an important (if late introduced) character with his own ending and everything, but so far has not appeared in any ''Clannad'' anime adaptation ever.

* The [[Anime/FullmetalAlchemist 2003 anime]] of ''Manga/FullmetalAlchemist'' cut out a lot of the cast who were introduced partway into the original manga (the Xingese characters, the Briggs soldiers, etc.) since the anime OvertookTheManga. Ling appeared in a cameo, but was otherwise excluded.

* ''LightNovel/AscendanceOfABookworm'': Some minor characters from the light novel are absent from the anime adaptation:

** Porygon's evolutions never appeared in the anime, due to it being associated with [[RealLifeWritesThePlot the infamous episode that caused seizures]], even though [[CommonKnowledge it was actually Pikachu's fault in the scene]]. Their lone appearances have been brief cameos in some of the later movies.

* 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. All of them were brought back in the 2014 anime.

* ''Anime/TekkenBloodline'' is a loose adaptation of ''Videogame/{{Tekken 3}}'', and features most of that game's cast (even if many are [[DemotedToExtra mere cameos]]), with a few exceptions. Eddy Gordo, Bryan Fury, Panda, Forest Law and Mokujin are all absent, though Eddy is at least mentioned in a news article. The same goes for Gon, though, as a GuestFighter in the first place, [[ExiledFromContinuity licensing issues likely made that impossible to begin with]]. Also, while she was merely an NPC in that game, Michelle Chang still appeared in her daughter Julia's ending, with her kidnapping being the reason Julia entered the tournament in the first place. Here, Michelle is only mentioned, and her disappearance is implied to be due to Ogre.

* ''Anime/TekkenBloodline'' is a loose adaptation of ''Videogame/{{Tekken 3}}'', and features most of that game's cast (even if many are [[DemotedToExtra mere cameos]]), with a few exceptions. Eddy Gordo, Bryan Fury, Panda, Forest Law and Mokujin are all absent, though Eddy is at least mentioned in a news article. The same goes for Gon, though, as a GuestCharacter in the first place, [[ExiledFromContinuity licensing issues likely made that impossible to begin with]].

* ''Manga/{{Splatoon}}'' removes almost all of the Great Octoweapons that appear in [[VideoGame/{{Splatoon}} the first game]]. The only one to appear in the manga adaptation is Octostomp.

** Mitsuki Oosawa manga: Holyn and Beowulf, prospect love interests for Ayra and Raquesis, disappear from the story -- while Ayra [[BelligerentSexualTension hooks up with Lex]] and [[LadyAndKnight Raquesis with Finn.]] (after having her BrotherSisterIncest deal with Eldigan cranked UpToEleven [[spoiler: until he dies]]) This was presumably done to avert DerailingLoveInterests - [[FridgeLogic which doesn't explain]] why Oosawa kept an expy of Eldigan's canon wife Grahnye around [[DieforOurShip and made her a total asshole]], while still capable of making a LoveTriangle between Ferry, Lewyn and Sylvia without derailing the loser (Sylvia, who instead is very sympathetic).

** The post-League Battle Zone from ''Diamond, Pearl, and Platinum'' doesn't appear until ''Journeys'', when Ash and Goh visit Resort Area with its unusually strong Magikarp. The Battle Area and Fight Area still haven't been seen, and Stark Mountain is only mentioned once by Buck.

** 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.

** Zinnia and Aarune from ''Omega Ruby/Alpha Sapphire'' don't appear either. Lisia on the other hand debuted in ''Journeys''.
** 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.

** For the longest time, Bill was the only PC programmer from the games that has appeared in the anime (and in only one episode at that). Nothing about him being in charge of the Pokemon Storage System is even mentioned since that doesn't appear in the anime either. No appearances have been made from [[VideoGame/PokemonRubyAndSapphire Lanette]], [[VideoGame/PokemonDiamondAndPearl Bebe]], [[VideoGame/PokemonBlackAndWhite Amanita]], or [[VideoGame/PokemonXAndY Cassius]]. [[VideoGame/PokemonSunAndMoon Molayne]] does make an appearance in the ''Sun and Moon'' anime, but again, his role as a PC programmer is not mentioned at all.
** Courtney and Matt, admins from Team Magma and Team Aqua respectively, do not appear in the anime at all.

** Professor Sycamore's recurring assistants Sina and Dexio didn't appear in the anime, though 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, but the Resort Area and its unusually strong Magikarp made an appearance in the ''Journeys'' anime.

* The [[Anime/AceAttorney 2016 anime adaptation]] of ''VisualNovel/PhoenixWrightAceAttorney'' uses this trope a lot:

** Zinnia and Aarune from ''Omega Ruby/Alpha Sapphire'' don't appear either. Lisia on the other hand will make her debut in ''Journeys''.

** While their existence is acknowledged, some Elite Four members from Hoenn[[note]]except Drake[[/note]] and Unova[[note]]except Caitlin [[/note]] are never shown. Will and Karen from ''Gold'' and ''Silver'' and Drasna from ''X'' and ''Y'' never appear as well.