Doing up a competitive Spirtomb

[Trent]

IMHO, 10% chance of first strike does not make Quick Claw worth it. Ask for Spiritomb in itself, I think you might be better off playing it as an annoyer or tank. Because, lets just face it. The guy has defensive stats and a type that leaves it with no Super Effective. You should probably take advantage of that.

Spiritomb @ Leftovers
Pressure
-Confuse Ray
-Toxic/Will o' Wisp
-Protect
-Destiny Bond

I guess thats all that I can think of, though you might want to drop one of the annoying attacks to keep Dark Pulse, like you said. But his attacking stat is so unimpressive, that I think it might be best just to have him rely on Toxic to get the job done. Confuse Ray is there for the obvious reason that it helps him stay alive for that much longer, and Will O' Wisp is there just in case you want something to cut down those mean ol' P Sweepers.

Pain split would be really nasty also. Just imagine someone taking the time to bring it down to the red, then getting slapped for a big chunk of damage and healing the tank back to full.