Similar to my last set, it's a little bit different though.
Regirock Curse set
Regirock @ Leftovers
Trait: Clear Body
EVs: 252 HP / 64 Atk / 192 SpD
Careful Nature (+SpD, -SpA)
- Stone Edge
- Drain Punch
Stone Edge is good STAB, and makes Regirock able to check Flying types reliably.
Drain Punch gets some extra coverage, and the healing it gives (especially after a few Curse boosts) is really nice.
Earthquake is excellent along with Stone Edge, creating the infamous EdgeQuake combo, which is rarely seen resisted.
Curse boosts Regirock's already decent attack stat, and already excellent defense stat to even higher levels.
DO NOTE: This set works best with the support of the ability Sandstream by boosting Regirock's SpD by 50%, which it greatly appreciates..