Pokémon Model Ripping Project

[Chaze]

I've noticed that some characters, like trainers and even the protagonist themselves can look sideways in the game, but there's nothing about that in the textures.
Lass:


Ace Trainer:


Protagonists:

(also, the protags seem to have move expressions, perhaps those weren't included in the demo?)
Maybe there's some hidden pupils textures?

Maybe some material animations.
I really wanna know how it works, and it can be ripped/extracted too ?