Rhyperior

Solid Rock reduces all super-effective hits by 25%. Rhyperior's 4x Water and Grass weaknesses become effectively 3x, making normally lethal type matchups survivable under Trick Room protection. Earthquake spreads Ground STAB to both opponents. Rock Slide spreads Rock damage and flinch. Ice Punch covers Dragon and Flying types that resist Rock. Brave lowers Speed to the minimum for guaranteed Trick Room priority. Maxed HP and Attack with Leftovers creates enormous physical bulk with passive recovery each turn. Under Trick Room, Rhyperior's negligible Speed becomes maximum priority. 140 base Attack with Solid Rock damage reduction and Leftovers sustain creates a sweeper opponents cannot efficiently remove from the field.