History AdaptationPersonalityChange / Pokemon

* Lt. Surge and Clay go from {{Eagleland}} Type I to Type II.

* While Hapu retains her formal speech patterns from the games (as a result of not being used to speaking with trainers her own age), her character is initially much more impulsive; presumably as a result of taking the reins of Island Kahuna from her late grandfather Sofu and Tapu-Fini not willing to recognize her in the role; straddling the line between AdaptationalJerkass and AdaptationalAngstUpgrade. This contrasts her portrayal in the games as being more friendly and supportive towards challengers, though by the time of the Poni Island Grand Trial; she does become closer to her characterization in the games.

* 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]].

* Both Colress from the ''Black and White'' games and Xerosic from ''X and Y'' share the dubious honor of going from members of their respective teams who are simply in it [[ForScience for science]] who eventually [[HeelFaceTurn turn face]] to straight villains with absolutely no redeeming qualities.

* Olivia is much goofier and more affectionate than in the games, her suaveness brought down by being the perennial victim of SlapstickKnowsNoGender. [[ArsonMurderAndJaywalking Also, she wears a jacket due to her original appearance being too provocative to younger audiences.]]

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

* Iris goes from cherishing her GenkiGirl tendencies and being oblivious to social views regarding her status to a BrattyHalfPint KnowNothingKnowItAll (at least outside the topic on Unovan Dragon-types), admonishing others from being uneducated childish people in order to cover for her own insecurities. She [[CharacterDevelopment grows out of this by the end of the Black/White series]] and becomes more like her game counterpart.
* Cilan goes from ShrinkingViolet in the games to a LargeHam.

* 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 its animé appearances, it's not so much savage, just very mistrustful to those it 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]].

Being a large franchise with [[AdaptationOverdosed 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.

* 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.

* Bianca isn't quite as shy as she is in the games, nor is Cheren quite as obsessive.

* In the games, Erika's main trait is that she's a {{sleepyhead}}. Despite her several appearances in the manga, this never appears.

* As a result of Lusamine's AdaptationalJerkass, Lillie is a bit more timid and shell-shocked in the manga.

* If ''VideoGame/PokemonMasters'' is to be believed, then Hilbert is generally level-headed while Hilda is more HotBlooded. With the characters of Black (Hilbert) and White (Hilda), it's the exact opposite, and taken to extremes given that Black is a straight-up IdiotHero and White a NeutralFemale, although they both improve through CharacterDevelopment.

* Strangely enough, the highly-praised complex AntiVillain N was actually [[AdaptationalVillainy simplified]], with his sympathetic traits being toned down and becoming generally much creepier.
* Bianca isn't as shy as she is in the games.
* While not as energetic as her anime counterpart, ''Adventures'' doesn't portray Elesa as an EmotionlessGirl like in the games. She's much more cheerful.

* Bianca in the games can be energetic largely [[CuteClumsyGirl by accident]] or when trying to catch up to someone, and her personality was mild-mannered and deeply insecure. Bianca in the anime is a GenkiGirl who is incredibly outgoing and overconfident, while also suffering from frequent bouts of AdaptationalDumbass and AdaptationalJerkass.

* A similar case to Sapphire is the above-mentioned Platinum Berlitz; in-game, the apprentice of Prof. Rowan, in this case the NPC Dawn, would be a friendly, plucky NeutralFemale who doesn't do much to affect the plot, but is there as your friend and somewhat of a guide. Platinum on the other hand is an unusually stoic, sheltered girl, and has been promoted to a role closer to the player character, battling and taking on gyms. Meanwhile, Diamond, who would be the player character in the games, has no interest in gym battles or battling in general.