>>42800413In this case it has more to do with how the hurtboxes, which are all slightly thicker than the character's actual body, are displayed by the game. It is a blue/green overlay over the invincible body parts, which usually appears normal on characters that don't wear dresses, but overlayed on Zelda's dress it makes her appear thicker than she actually is. It's fun to imagine her with a large butt though.
