Corphish

Corphish is a great wallbreaker and late-game cleaner thanks to Adaptability, a great ability that boosts Corphish's STAB multiplier from 1.5 to 2. Backing up this ability, Corphish has great STAB moves in Crabhammer and priority Aqua Jet. Corphish also has access to Knock Off, a great move for a wallbreaker. Although Corphish has access to two boosting moves in Swords Dance and Dragon Dance, it faces competition as a setup sweeper from Scraggy, Fletchling, Tirtouga, and Omanyte. Corphish's flaws lie in its only decent physical bulk, fairly mediocre special bulk, and sub-par speed, albeit it's still fast enough to outspeed most walls. Lastly, Corphish struggles against prominent threats such as Chinchou, Cottonee, and Croagunk.