Bronzong@Leftovers
Sassy
252 HP, 156 Sp. Def, 100 Def
Levitate
Gyro Ball / Charge Beam / Sleep Talk / Psychic
Calm Mind
Grass Knot / Psychic
Rest
Well, you can run this beside a cleric or use Rest-Talk on the first slot. Basically, Calm Mind increases the Sp. Def further, and you can take advantage of the Sp. Atk boost. Psychic can provide good STAB and will do some damage after a few CMs. Bronzong is actually rather easy to set up because it is already rather bulky.
~T_S