This set probably isn't too effective but what the heck.
The Smeargle of OHKOs!
Smeargle@ Focus Sash
Ability: Own Tempo
Basically just spam Lock-on/Mind Reader and Sheer Cold/Fissure. Use a Focus Sash so you can survive a hit and potentially deal another killing blow. With any luck you'll at least be able to KO one of your opponents Pokemon. But really there are so many better options out there with Smeargle. Not like he can really use them effectively though.
EVs:252 Defense/ 252 Special Defense/ 4 Speed
Maximize your defensive capabilities and add a little Speed. Your Jolly boost should help a little with Speed as well.
† I am a Christian and proud of it! Copy and paste this if you are too.†
Pokemon Black Trainer Name: Andrew
I also have Pokerus and am willing to spread it. Just PM me if you want to trade so I can transfer Pokerus to something you have.