Haxorus

Haxorus's massive Attack stat and its access to great setup moves, Dragon Dance and Swords Dance, make it a significant threat in UU. Its Speed, while only average for an offensive Pokemon, makes it the fastest user of Dragon Dance in the tier, notably allowing it to outspeed Mega Aerodactyl after a boost. Haxorus has great coverage to complement its STAB moves: Mold Breaker Earthquake and Poison Jab hit every Steel- and Fairy-type for major damage. However, Haxorus is rather reliant on Outrage to do significant damage to Pokemon such as Alomomola, Porygon2, and Milotic, making it easier to revenge kill. Additionally, Haxorus's mediocre bulk makes it difficult to set up, and as a wallbreaker, competitors such as Hydreigon, Krookodile, and Tyrantrum bring more defensively to the table through their superior typing, bulk, and abilities.