Politoed @ Choice Scarf
4 hp / 252 SpA / 252 spe
-Focus Blast / HP Grass / Perish Song
Scarf Politoed is pretty awesome in the current BW2 metagame. It's fast, it hits hard and has high enough base defenses to at least take pretty much any unboosted move in the game. These qualities add to create a very reliable Pokemon to have on fast paced rain teams. It's effective at revenge killing most of the metagame, including the new genie forms. Try it out, I guarantee that it won't disappoint.