Psyduck

Psyduck seems to be just a standard Water-type on the surface, but below that lies an interesting difference. Psyduck is one of the few Pokemon with the Cloud Nine ability, allowing safe revenge killing of threats such as Drilbur. Psyduck is fast enough to use a Choice Scarf as it reaches 14 Speed unboosted, and it has a good movepool to hit opponents with. Sadly, it's not all good news for Psyduck. Its stats are a bit lacking, and most of what it can do would be horribly outclassed if not for its situational ability. Overall, Psyduck is an interesting option, if only for the fact that it is a safe choice to KO the important Drilbur.