History AdaptationPersonalityChange / Pokemon

* Erika is very much an {{Ojou}} in all of her incarnations, but her anime version seems more casual, and she lacks her SleepyHead traits from the games. She also has more of a temper as she bans Ash from battling her just because he dislikes perfume. Her portrayal in ''Anime/PokemonIChooseYou'' is a TruerToTheText portrayal of her game characterization.

* Erika is very much an {{Ojou}} in all of her incarnations, but her anime version seems more casual, and she lacks her SleepyHead traits from the games. She also has more of a temper as she bans Ash from battling her just because he dislikes perfume.

* Skyla goes from a NiceGirl to a {{Jerkass}}.

* Tim Goodman, one of the protagonists of ''VideoGame/DetectivePikachu'', is looking for his father, a famous detective who [[DisappearedDad went missing]], but is otherwise an [[TheEveryman average]] [[JustAKid 17 year old kid]]. His depiction in ''Film/PokemonDetectivePikachu'' gives him an AdaptationalAngstUpgrade (in the form of trying and failing to be a Pokemon Trainer), [[AgeLift and ages him to 21]], which makes him a bit uneasy with working with a [[TalkingAnimal talking Pikachu]].

** James is a bit more snappy and stands up for himself more.

* WordOfGod is that Elesa is supposed to come off as an EmotionalessGirl. This can be seen in all her official art and game sprites. She's only shown to be NotSoStoic when she breaks character after being defeated. Despite being a TruerToTheText trailer based directly on the games, ''Anime/PokemonBlack2AndWhite2IntroductionMovie'' shows Elesa excited and smiling while being challenged by Nate.

* Sabrina in the games is pacifistic and a CreepyGood who is not apparently malicious. In the anime she has an evil SplitPersonality but her "true" self at the end of her arc seems more in-line with her game self.

* Sabrina is portrayed as more open and nice than her more stoic CreepyGood game counterpart.

* Ash in the AlternateContinuity film ''Anime/PokemonIChooseYou'' has slight differences from his mainstream incarnation. He's more of a "normal" everyday kid instead of a StockShonenHero. He's bighearted but doesn't go around helping people every other day. Ash has some AdaptationalJerkass and AdaptationalIntelligence elements as well, being more brash and easily agitated than his main counterpart while also being slightly less of an IdiotHero. He also doesn't display [[MenDontCry shame towards crying]] like Ash used to in the Original Series.

* Whitney. Unlike her crybaby incarnation from the games, she didn't even shed a tear when she lost to Ash.

* While not as energetic as her anime counterpart, ''Adventures'' doesn't portray Elesa as an EmotionalessGirl like in the games. She's much more cheerful.

* Sophocles in the games is an introverted boy. In the anime he is much more sociable and even a bit cocksure and snarky.

* Sophocles in the games is an introverted boy. In the anime he is much more sociable.
* Olivia is much goofier than in the games.

* Erika is very much an {{Ojou}} in all of her incarnations, but her anime version seems more casual, and she lacks her SleepyHead traits from the games. She also has more of a temper as she bans Ash from battling her because he dislikes perfume.

* Whitney. She didn't even shed a tear when she lost to Ash.

* Some of the normally neutral, or even heroic, Gym Leaders and Elite Four characters were made into villains and anti-villians; especially in the first and second generation arcs. For example, Lance in the games is a ReasonableAuthorityFigure who is somewhat hotheaded at worst, but Lance in ''Adventures'' is a misanthropic WellIntentionedExtremist who is basically [[VideoGame/PokemonBlackAndWhite N]] if he were a genocidal maniac.

* Ash and Brock are both more [[DirtyKid blatantly perverts]], and even Misty is a CovertPervert (in a scene that was {{Bowdlerized}} in translation) due to the adaptation being HotterAndSexier. (This was before Ash gained notoriety as a ChasteHero, when he was still known to [[EarlyInstallmentWeirdness show interest in girls at a few points]]).

* Jasmine goes from a ShrinkingViolet in the games to a confident badass in the anime, at least when it comes to kicking Team Rocket's ass and battling other trainers aggresively. She keeps her kind demeanor, though, but clearly doesn't hesitate here when speaking. On a side note, when her Ampharos is sick, she's just as fragile and depressed as in the games, but that only lasts one episode before the personality switch.

* In the games (and ''Anime/PokemonOrigins''), Mewtwo is a BloodKnight that supposedly has the most savage heart among Pokémon due to his genetic makeup. In his animé appearances, he's not so much savage, just very mistrustful to those he doesn't know. Though Mewtwo in ''VideoGame/PokemonXAndY'' is found alone in an area where mistreated Pokemon live, implying it is lonely and has been abused, [[RetCanon bringing it closer to the anime version]].

* Clay goes from {{Eagleland}} Type I to Type II in the anime.

* Lt. Surge goes from Type 1 EagleLand to Type 2.

* In the games (and ''Anime/PokemonOrigins''), Mewtwo is a BloodKnight that supposedly has the most savage heart among Pokémon due to his genetic makeup. In his animé appearances, he's not so much savage, just very mistrustful to those he doesn't know. Though Mewtwo in ''VideoGame/PokemonXAndY'' is found alone in an area where mistreated Pokemon live, implying it is lonely and has been abused, [[RetCanon bringing him closer to the anime version]].

* Erika is very much an {{Ojou}} in all of her incarnations, but her anime version seems more casual. She also has more of a temper as she bans Ash from battling her because he dislikes perfume.

* Ash and Brock are both more [[DirtyKid blatantly perverts]], and even Misty is a CovertPervert (in a scene that was {{Bowdlerized}} in translation) due to the adaptation being HotterAndSexier. (This was before Ash gained notoriety as a ChasteHero, when was still known to [[EarlyInstallmentWeirdness show interest in girls at a few points]]).

* In the ''Anime/{{Pokemon}}'' anime, Sabrina has a very malicious SplitPersonality that terrorized the entire Saffron City with her psychic powers [[ForTheEvulz because she could]]. ''Manga/TheElectricTaleOfPikachu'', despite the strong anime influence, averts her villainy and [[AdaptationalHeroism turned her into a heroic, motherly figure.]]
* Ash in the anime is a notorious ChasteHero but in this manga adaptation he is a DirtyKid. This is mostly because this version of Ash is an exaggerated version of his Original Series portrayal, particularly his portrayal in Kanto, [[EarlyInstallmentWeirdness where he does show interest in girls at a few points]].

Being a large franchise with [[AdaptationOverdose loads of adaptations]] and LoadsAndLoadsOfCharacters who can be interpreted in various ways by various people, ''Franchise/{{Pokemon}}'' adaptations are prone to changing character's personalities.

Being a large franchise with LoadsAndLoadsOfCharacters who have varying degrees of characterization, ''Franchise/{{Pokemon}}'' adaptations are prone to changing character's personalities.

* The English dub changed several characters personalities in early seasons. For example, Gary was made into more of a JerkAss (making him more similar to his game counterpart, Blue) while Misty's cocky tendencies (in Japan she frequently referred to herself as the "most beautiful girl in the world") were toned down.

* In the games (and ''Anime/PokemonOrigins''), Mewtwo is a BloodKnight that supposedly has the most savage heart among Pokémon due to his genetic makeup. In his animé appearances, he's not so much savage, just very mistrustful to those he doesn't know. Though Mewtwo in ''VideoGame/PokemonXAndY'' is found alone in an area where mistreated Pokemon live, implying it is lonely and has been abused, [[RetCanon bringing him closer to the anime version]].

* Even some Pokemon get this, on the species level no less--for instance, Spearow in the games is a tiny bird that isn't very good at flying and is as likely to flee from you as it is to fight. The anime opts to portray them as vicious little flying nightmares whose EstablishingCharacterMoment consists of them swarming the protagonist and his partner Pokemon [[DisproportionateRetribution simply because the former threw a rock at one of them]]. ''VideoGame/PokemonSunAndMoon'' used the anime characterization when a group of Spearow attack a Pokémon at the start.
* In the games, Lillie [[spoiler:has a DarkAndTroubledPast]], and as such is very shy and reclusive. In the anime, aside from being afraid to touch Pokémon (while her game counterpart instead just hated seeing Pokémon battle), she's more outgoing. [[spoiler:She also has a ''different'' DarkAndTroubledPast]].

* Blue Oak is cocky, arrogant, flashy, and before CharacterDevelopment set in in future games, quite a bit of an obnoxious brat, said to have little respect for his Pokémon. ''Adventures'' Blue is TheStoic and WiseBeyondHisYears, often acting as the OnlySaneMan around his peers. He started out cockier and brattie but [[CharacterizationMarchesOn changed a few chapters in]].
* Silver in the games is an unpleasant, selfish, grade A {{Jerkass}} of a kid who hits the protagonist and constantly complains, unashamedly seeing his Pokémon only as a means to an end, having a NeverMyFault outlook on everything, always in denial about his losses, making a point of the fact that he doesn't have any friends, and [[SocialDarwinist despising the weak with a burning passion]], frighteningly obsessed with being a strong trainer and in the original games going as far as to say he wants to ''exterminate'' the weak, with his CharacterDevelopment focusing on him getting rid of all of that and growing up into a better person. Silver in ''Adventures'' is a completely different character, lacking all of these qualities, becoming more of an IneffectualLoner, having a previous friendship in Green, treating his Pokémon with respect even if he doesn't name them, being much calmer and far more mature, and none of his trademark obsession with strength being present.

* In ''VideoGame/PokemonDiamondAndPearl'' (and ''Platinum''), [[TheRival Barry]] was a hyperactive, silly kid who tended to blunder a lot, and frankly somewhat of a dunce with a horrible case of AttentionDeficitOohShiny and a touch of CloudCuckooLander, often charging into situations that may be unsafe without thinking, but possessing a heart of gold. He is dead-set on becoming the Pokémon champion and as strong a trainer as his father, seeing you as his rival. His ''Adventures'' counterpart, Pearl, while also hyperactive, is actually the OnlySaneMan of the PowerTrio between him, his extremely mellow, kind, but somewhat stupid childhood friend Diamond, and the highly intelligent but emotionally stunted [[TheOjou Ojou]] with NoSocialSkills Platinum Berlitz, is a lot more cautious than Barry, and his goal here is forming a BokeAndTsukkomiRoutine duo with Diamond, meeting Platinum and being roped into going on a journey around Sinnoh completely by accident.

** Strangely enough, the highly-praised complex AntiVillain N was actually [[AdaptationalVillainy simplified]], with his sympathetic traits being toned down and becoming generally much creepier.
** Lusamine and her son both have AdaptationalJerkass traits. Lusamine's emotional abuse is more emphasized and Gladion is implied to dislike women in power as a result of his mother. Gladion is also more aggressive than in the games.
** As a result of Lusamine's AdaptationalJerkass, Lillie is a bit more timid and shell-shocked in the manga.