It's pretty strong, but I still don't think it needs to be banned. In fact, I don't think anything besides things like Xerneas and Mewtwo (Maybe Mega Blaziken) needs to be banned until we have the full metagame when Pokebank gets released
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Way too many counters to warrant a ban. He's good, yes, but the fact he can't touch Azumarill, gets walled to hell and back by Goodra, Rotom can V Switch out and he has paper thin defenses just makes him not-uber level.
Tales of Xillia... here I come! Dissidia 012: Main:Terra Subs:Squall,WoL,Cloud and Kain.