User blog comment:Ellyaely/Pokemon Freejoin Mystery Dungeon?/@comment-25638472-20151121222456

Also, if for whatever reason your character simply doesn't fit with a Pokemon due to typing, species, etc, I am willing to use the Delta Species concept for such things (example, someone has a beaver character that has poison abilities, then it could be a Poison type Bidoof, though in this case the ability Poison Touch would work too).