That character now is a Pokemon Trainer who ONLY uses those type of Pokemon, and cannot use its abilities unless for some reason an enemy from his universe comes to where it is (aka. never). Outfits can be whatever.
Who did you think of?
Ie.: Mami Tomoe is now a Steel/Fairy Magical Trainer.
In the name of the Fang, I sentence you to death. Mami Tomoe's one and only FE Hero and husbando! http://i.imgur.com/BJLRo9B.jpg http://i.imgur.com/2qQaSE1.png