I'm completely against Wolf being in the top upper tier. The reasons that I'm about to give have also been given by quite a few other players (some of them in this thread), and will more than likely agree with me.
Wolf has a very abusive (Spammy) smash attack. Have you actually seen how far it's range is?
His blaster is HIGHLY spammable. Not much else you need to know about it.
I'm not going to argue about where he should be placed, but I'll aruge on where he SHOULDN'T be placed.