Use a MoxieKrow.

Honchkrow @ Life Orb
Jolly - Moxie
252 Speed, 252 Attack, 4 HP
-Sucker Punch
-Brave Bird
-Superpower
-Roost
This set is insane in NU. Switch this in on a weakened opponent, finish it off, grab an attack boost, and sweep. Sucker Punch gets priority and STAB, although it IS setup bait, which is why we have Brave Bird as a secondary powerful STAB. Superpower rounds off the coverage, nailing Rock and Steel types for SE damage. Roost heals off Life Orb and Brave Bird recoil.
Really, this thing is insane. If your opponent doesn't know how to counter it, it can easily 6-0 an entire team. I'd recommend pairing him with a strong Steel type to counter the Rock and Ice Pokemon he tends to attract.