Toxicroak

Toxicroak is a Pokemon designed to function well on rain teams. It takes no damage from Water-type attacks, has passive recovery under rain, and access to Swords Dance and good coverage options, allowing it to check or bust through many Pokemon that rain teams struggle against such as Ferrothorn, Chansey, Tentacruel, Keldeo, and Breloom. However, other than its Attack, Toxicroak has poor stats and it relies a lot on rain to be useful. Depending on the set it runs, Toxicroak is also walled by common OU Pokemon such as Jellicent, Hippowdon, and Skarmory. At the end of the day, Toxicroak is a decent Pokemon for rain teams that helps them overcome some of their most common weaknesses, and even though it has some significant flaws, its positive traits make up for them with the right support.