From what I know about Grimm, it may be as similar as a comparison I can manage. Still, it's important to note that Pokémon can be unruly in the wild at worst, but never evil.

[ as the saying goes, there's no such thing as a bad pokémon. carbink is a little ambivalent to the sudden stranger cuddles at first, but gradually relaxes - its body is hard as diamonds, but the collar separating its body from its head is as soft and fluffy as cotton candy! aggron parts himself from his trainer's petting to watch jaune address him, opening his mouth in what appears to be its best attempt at a smile with a jaw that vicious. ]

That's about right. [ well done, jaune! full points to you. ] Though that's not to say that Carbink can't hold its own in battle as well - both of them are good friends of mine and essential members of my team.