Role: wall, staller
EVs: 252 HP, 252 sp. defense, 4 sp. attack
Light Screen: Raises sp. defense for five turns.
Reflect: Raises defense for five turns.
Toxic: To stall.
Psychic: All walls must have an attacking move, STAB, great power.
Be aware of Steel types! I recommend this set in doubles with a Fire and/or Fighting type. Hope this helped!