Here's a moderatly good set.
Bulkachan @Focus Sash or Life Orb
Ability: Iron Fist
Nature: Adamant
-Bulk Up
-Thunder Punch
-Fire Punch
-Ice Punch
EV's : 4 HP, 252 Atk, 252 Speed
You should be able to outspeed the other Pokemon, and get a Bulk Up off, then they might "0HKO" you. Then you can...