lolwut. This seems like it will be a blast. I do question the whole only having power roles post that they received their roles. That obviously makes them targets over those who don't post. Also, I'd say it is a safe bet that many of the dark type pokemon are shady to begin with.
But really? IceKyurem? Isn't he Tepig? How could Tepig ever hurt anybody?
EDIT: Lol, Kyurem. Ummm... yeah not sure how that will go =P Kyurem seems like a third party pokemon to me, not really mafia.