>>41790002Hmmmm... Well, you could look at places where Gardevoir could be differentiated between one another, such as the shape of the horn, the ears, or the cut of the "dress" (like making it shorter in the front so it's more like a "coat".)
You could also look at specific memories you have of the Gardevoir and tie those in. If he came from a Gamecube as a Shadow Pokemon you could work that in, like giving him a different eye color or scar or something. Or if there's an item you like to have him carry, you could work that in as a clothing element.