It's... probably not as... violent as you think. Whenever these pokemon battle, it's never to the point where they're seriously injured.

[ There's something mechanical about the way this one thinks. It's still a bit odd. No, scratch that. It's super odd. ]

Sableye does have its merits but you'll probably have to train it to get stronger to start. Pokemon come in different types, each with differing strengths and weaknesses. As it is now, he's pretty young and inexperienced.