Ludicolo

Ludicolo is one of the most essential Rain Dance sweepers because of its Grass typing, which allows it to strike down the annoying Water-type Pokemon that cause havoc for Rain Dance teams. In the rain, it outruns the majority of UU Pokemon and has enough power to slay them with Energy Ball, Surf, and Ice Beam. Ludicolo also has impressive special bulk, enabling it to stay in and set up against a wide range of foes. Lastly, Ludicolo has access to Swords Dance and an adequate physical movepool, which allows it to foil foes that think it's running a special moveset.

However, Ludicolo has a couple of problems. Its base 90 Special Attack is not especially impressive, even when using Surf in the rain. Ludicolo can also be picked off easily by a number a priority moves, such as Extreme Speed, Fake Out, Quick Attack, and Mach Punch. Even then, Ludicolo stands out as a useful Rain Dance user that helps keep the offensive momentum going.