Well, I just never really thought about his teeth, since if his mouth ever did open, it was just a generic mouth-hole. Even if they were Barney-teeth, it'd be weird.
kuroshinzo said: what are you talking about he had nearly as much inner monologue as Rorschach
and he spoke out loud a lot too, but that was all telepathic tho so its a moot point anyway.
the only time we seen his teeth during animation I think was during the 10th anniversarry special. might have in the Mewtwo special in Johto as well, bt I only saw that once