Torkoal @ Leftovers/Shuca Berry
Relaxed Nature (+Def, -Spd)
252 HP/232 DEF/24 SP ATK
-Flamethrower/Overheat
-Explosion/Protect
-Substitute
-Will-O-Wisp/Yawn
works like a charm. protect is if you want to stall with will-o-wisp. will-o-wisp, however, is ideal for cutting attack. it is quite unproductive tho. an explosion to the right opponent will cause enough internal damage. you can also use yawn + protect to induce sleep if you're not fond of will-o-wisp, or just aren't quite settled with it.