Gligar

Gligar is a great Pokemon in the UU metagame, boasting awesome bulk thanks to its 65 / 105 / 65 defenses coupled with Eviolite. Its typing gives Gligar immunities to Ground and Electric and resistances to common types in UU, such as Bug and Fighting. Thanks to its typing, it is also the only Flying-type in UU that isn't weak to Stealth Rock, making it a reliable Defogger, as it isn't worn down as easily as other common Defoggers in UU. It also sports an impressive support movepool with moves such as Taunt, Knock Off, U-turn, Stealth Rock, Defog, and Roost. While Gligar has an amazing movepool, typing, and stats, its reliance on Eviolite for its bulk means it must watch out for Knock Off, which runs rampant throughout UU. Knock Off is also a common coverage move on a lot of Fighting-types that Gligar would otherwise have no trouble switching into. Another problem Gligar has is that while it is one of the most reliable Defoggers, its preferred ability, Immunity, is illegal in conjunction with Defog. Gligar's 4x weakness to Ice can be problematic when trying to fit it onto teams. Another flaw is its poor offensive potential, meaning U-turn is almost a necessity to maintain momentum.