Mankey

Mankey is a revenge killer whose main niche over other Fighting-types is its access to Gunk Shot, which allows it to significantly damage Fairy-types, and Close Combat, which is one of the strongest Fighting-type moves. It also has other coverage moves such as Earthquake to hit Poison-types and Ice Punch to hit Foongus and Pumpkaboo, and a pivoting tool in U-turn, allowing Mankey to gain momentum, all of which are backed up by a great Attack stat and the respectable 17 Speed tier. Thanks to Defiant, it is also able to gain +2 Attack whenever it is affected by Sticky Web, Defog, or Intimidate. However, Mankey cannot take hits and is vulnerable to priority attacks due to its poor bulk, which is only amplified after Close Combat's defense drops. It faces heavy competition from other Fighting-types, primarily Mienfoo, as it is able to perform Mankey's role of a revenge killer far more consistently. In addition, Mankey's lack of Knock Off means that it has a tough time getting past Ghost-types, and while Defiant is a good ability, it is very situational and hard to make use of with Mankey's low bulk.