What should I give my Roserade in Pokemon Diamond?

Well, if your open to new ideas, I would say give roserade the following moves; SLEEP POWDER, Giga Drain, Shadow Ball, Sludge Bomb. If you Ev train in speed, and use Sleep Powder first, Roserade will be HARD to defeat. I've beat my friend's whole entire team like that. oh and big root as the item. I hope that helps ; - )