Crippler/ Switch "Forcer" @ Leftovers
Nature: Jolly or Adamant
-Torment
-Protect
-Taunt
-Iron Head
EV:128 HP or Speed/252 Atk/128 Def or Speed
This can take advantage of walls, which usually have 1 offensive move only. Use protect to scout if your foe is one, Taunt then torment. Throw Iron Heads...