Volcarona

Quiver Dance Volcarona is one of the most dangerous sweepers in ORAS OU. Its STAB moves, Giga Drain, and Hidden Power make it very difficult to switch into, its boosted attacks OHKO most Pokemon, and it outspeeds everything but a few Choice Scarf users after boosting, meaning it is more often checked than countered. Although it seems that Volcarona can sweep through a majority of teams on paper, in reality, its Stealth Rock weakness mandates entry hazard removal and limits setup opportunities. Its low bulk makes it susceptible to priority moves from Talonflame, Mega Pinsir, Crawdaunt, Dragonite, and Bisharp. Volcarona's sweeps are shut down by Chansey, and without the proper coverage, it is also be walled by bulky Fire- and Dragon-types like Heatran, Volcanion, Mega Charizard X, and Dragonite.