>>18594214V uses more size-accurate full body backsprites, as opposed to backsprites that are focused on the head. When you're selecting a move, the game will zoom in on the backsprite...which isn't really a good idea since you can see the individual pixels.
Also all the games have had some terrible fucking sprites. Gliscor had an awful, fucked up sprite in DP, and it didn't get fixed until Platinum.