Ludicolo

With a great movepool, awesome typing, and two fantastic abilities, Ludicolo can be a force to be reckoned with. The ability to run both physically- and specially-based offensive sets while also being able to act as a defensive pivot with the combination of Substitute + Leech Seed is not something the average Pokemon can claim. With Ludicolo's abilities offering either blistering Speed or the capacity for huge amounts of recovery in the rain, he is one of the best rain abusers in UU. Ludicolo is not perfect though; his Speed is mediocre outside of rain, and he must depend on Swords Dance if he wants to do much physical damage. Don't let that dissuade you from using him, though, as he is a solid Pokemon and a monster on rain teams.