[There are a few topics that one should really never bring up in front of John. One is movies, and the other is ghost types. Because you will never hear the end of his passionate nerd rambles.]

Last time they appeared in the wild, they ended up draining people's souls. Trainer-raised ones don't do it for some reason, but looking into the hole in a wild one's back is a one-way ticket to some kind of crazy fucked up dreamworld. Your body is left behind as an empty shell until somebody finds the Shedinja that took you and takes it out.