If Wilson is angered by anything, whether it be accidental or intentional insult, not getting his way, or even seeing his friends hurt, he's a completely different Shinx. He may be small but his electricity is no joke. Not only that but he can bite pretty good for his small size. Notice how his eyes go dark red. They don't change color when he's just a little angry. Best way to calm him down is to pet and/or cuddle him, if he doesn't claw at you immediately.