Rotom-Wash @ Leftovers
Ability: Levitate
EVs: 248 HP / 252 Def / 8 Spe
Bold Nature
IVs: 0 Atk
- Rest
- Sleep Talk
- Hydro Pump
- Volt Switch

Basically, this set allows Rotom-W to keep its health up to maxinum, something that Pain Split can't always guarantee. The loss of a status move is unfortunate, but the more reliable status and HP healing, as well as the conservation of HYdro Pump's PP, is often worth the tradeoff.