Gardevoir

Gardevoir is a very humanoid Pokémon. The majority of its body looks similar to a long flowing dress. It has long arms with only three fingers. A vast majority of the body is white with the exception of the hair, arms, and underside of the dress which all are green and a red almost fin-like horn that comes from the chest and a rounder one located on the back. The green hair covers part of the face and the side of the head. The face has three small spikes located near its red eyes, that causes it's face to somewhat resemble a masquerade mask. Upon its Mega Evolution, Gardevoir's arms and dress become wholly white and bigger, resembling a wedding dress. In addition, the horn on its chest duplicates into two. Meanwhile the spikes on the side of its head become notably bigger. This evolved form can only be retained during a single battle, as afterwards, Gardevoir will revert to its original state. Despite appearing female, it is possible for a Gardevoir to be male, although this is not as frequent as females.