Weezing @ Leftovers
Relaxed Nature (+Def, -Spd)
252 HP, 60 Atk, 96 Def, 4 SAtk, 96 SDef
Sludge Bomb
Fire Blast/Thunderbolt/Explosion/Rest/Destiny Bond/Pain Split/Rests
Will-o-Wisp
Haze
A bit of extra boost for Sludge Bomb. EVs are adjustable according to preferences. I suggest Pain Split for the third move for healing or Fire Blast for taking out Skarm and the rest of the steelie palls.