Rhyperior

With an extremely high Attack stat and a great STAB combination, Rhyperior makes its mark on RU as one of the most reliable offensive Pokemon in the tier. Thanks to Solid Rock and access to Stealth Rock, Rhyperior is able to run an efficient tank set that allows it to be one of the best offensive users of Stealth Rock in the tier. However, one shouldn't just focus on Rhyperior's abilities to tank hits and set up entry hazards. Thanks to its incredible Attack and STAB combination, Rhyperior can don a Choice Band to become one of the most terrifying wallbreakers in the tier, capable of 2HKOing any Pokemon with the proper prediction. Defensively, Rhyperior offers key resistances to Normal-, Fire-, and Flying-type moves, as well as an immunity to Electric-type moves. However, Rhyperior has unfortunate 4x weaknesses to Water- and Grass-type moves in a tier chock full of Pokemon such as Slowking, Venusaur, and Virizion. While Solid Rock helps Rhyperior with its Ground- and Fighting-type weaknesses to an extent, Pokemon like Flygon, Hitmonlee, and Medicham can still readily exploit these weaknesses. These common weaknesses are compounded by Rhyperior's lackluster Special Defense, especially when it's not invested, and poor Speed stat. In spite of this, Rhyperior is a great choice for many teams, as there are multiple ways to circumvent the issues it suffers from depending on the type of team Rhyperior is used on.