>>40563444Probably because GF wanted more "on-model" models instead of Stadium's kind-of-stylized stuff. Compare the way people like Pidgeot move between Stadium and XY, and in XY, he's alot more akin to his behaviour in the animes and shit, while Stadium Pidgeot is alot more livier and flappier, etc.
At the end of the day, they do have a vision for how those monsters behave that might differ from those games, for example, in those games Kecleon is kind of a weird that moves kind of dancing, while in all official GF/TPCI media he's more of a stiff and slow thing.
