Lucario

Lucario is a powerful wallbreaker and sweeper with its near unresisted STAB combination and Extreme Speed. Its boosted Close Combat OHKOes bulky Water-types such as Gastrodon, Milotic, and Seismitoad after Stealth Rock, while booosted Extreme Speed KOs most revenge killers such as Flygon, Crobat, and Noivern with minimal prior chip. Lucario's frailty makes it hard to set up, and even when it does, its sweep often ends to the combination of damage taken while setting up and Life Orb recoil. Some of Lucario's best checks like Crobat and Mimikyu are very common, limiting its sweeping capabilities.