Azumarill

Azumarill is an offensive powerhouse and effective wallbreaker when equipped with a Choice Band due to Huge Power, being able to nearly 2HKO the entire tier with the right move. It can also utilize a Belly Drum set to be a scary late-game cleaner. Water / Fairy is a great offensive typing, allowing Azumarill to beat key threats like Excadrill and Hydreigon. Access to great coverage moves such as Knock Off and Ice Punch lets Azumarill break past Pokemon like Tentacruel and Amoonguss that would otherwise check it by resisting its STAB combination, while Aqua Jet allows it to also be a great revenge killer against top threats like Zygarde-10% and Azelf that have taken chip damage. Azumarill also has decent natural bulk and a great defensive typing, which allows it to blanket check threats such as Hydreigon and Salamence. Unfortunately, Azumarill is quite slow, so it is easily forced out by faster Pokemon such as Tentacruel and Thundurus-T when it is not boosted with Belly Drum. Additionally, Rotom-W and faster Grass-types like Tapu Bulu and Zarude can revenge kill Belly Drum Azumarill, as they can stomach a +6 Aqua Jet. This gives Azumarill limited opportunities to fire off an attack due to its only decent bulk. Belly Drum Azumarill is restricted to only getting one setup opportunity, which usually forces it to be preserved until late-game. Azumarill faces large competition from Primarina as it offers more defensive utility with its bulk and doesn't have to deal with Rocky Helmet damage from physical walls like Skarmory and Amoonguss.