Infernape

While it may not be a popular choice in OU due to how much competition it suffers from other Fighting-type wallbreakers such as Keldeo and Terrakion as well as Fire-types like mixed Victini and bulky Mega Charizard X, Infernape still has a few tools at its disposal that make it a decent choice on certain teams. It sports a unique typing that, despite not being particularly good, enables it to check powerful threats like Bisharp, Weavile, and Scizor. It also has an outstanding movepool, with not only multiple coverage moves that give it the ability to deal significant damage to the vast majority of the OU tier, especially given its mixed offensive capabilities enabling it to break past both physical and special walls, but also a great support movepool, with moves like Slack Off, Will-O-Wisp, Taunt, and Stealth Rock. Unfortunately, while Infernape's typing and movepool are impressive, its stats are not. Its defenses are lacking, and while 104 / 104 / 108 offenses aren't bad, by ORAS standards they aren't very impressive either. Furthermore, Infernape's weaknesses to Water, Ground, Psychic, and Flying are all very crippling, given how common all of these types are in OU.