Might be worth mentioning that Goodra is a decent Curse user. Something like this:
Goodra @ Leftovers
Careful, Sap Sipper
EVS: 252 HP / 252 Def / 4 SpD
Moves: Curse, Dragon Tail, Earthquake, Aqua Tail
up to you. My buddy has had a lot of success with it. If you get some entry hazards set up it...