Gamefreak not beating the "Charizard is the main character" allegations. Normally creatures have 1 or maybe 2 bones to open and close each eye, and 1 maybe 2 for opening and closing the mouth.. Charizard has 5 for the eyelids, 2 for the eyebrows, a cheekbone bone, the basic opening and closing mouth bone, but also an extra two for each corner of the mouth...
 Not complaining about it, far from it. It feels great being able to just dunk the model as is into an animation and have it come out looking like the ones I normally have to spend time adding that stuff myself. It just seems a little odd considering there weren't any notable appearances of Charizard in S/V so the model in-game went to waste.
 Maybe it was the first model they made under S/V's new system to test it out how flexible they could make them, before having to cut back for the rest of the creatures.

Da homie looking better than ever here!

Charizard looks better in Scarlet and Violet than he did in Sword and Shield. :3

Gamefreak's favourite child

Frowny face Charizard

This is a good model to be honest.

WHY THEY CHANGED CHARIZARDS MODEL TOO?????!!! ALSO WHY DID HE GOT HIS 3DS TAIL FLAME BACK?? LMAO

They improved Charizard's model a lot. No more baby face