>>36361654based on XY sprites and lack of footprint, dress is hollow.
it doesn't have breasts either, it has big boobplate cups that stick out in front of its chin but don't actually contain anything.
It's a purple egg with arms in a platinum blonde wig and viking opera get-up. I know it's a wig too because in stadium when it is defeated the egg fades away but the wig floats to the ground.