Rain abuser. ( If you like abusing lower tier pokemon in OU, this is for you)
Suggested item: leftovers
Suggested abiltiy: hydration
Dive-STAB; lets him stall out.
Toxic-Stalls out and lets him do damage.
Rest-Cures status and restore health.
Aqua Ring-Gives him more health.
Again, this isn't the best set, but it's still pretty cheap.