Gliscor @ Yache Berry
Jolly Nature / Hyper Cutter
204 HP / 88 Atk / 216 Spd
~ Taunt
~ Stealth Rock
~ Earthquake
~ Ice Fang
Jolly nature and 216 Spd EVs puts Gliscor at 308 speed, which is enough to outrun (and OHKO) the fastest of Lucario, and other +speed base 90 pokes. A notable one is Roserade, who will lead and indefinitely attempt to Sleep Powder on the first turn. Its attempt are in vain, as it will be hit by a Taunt before it can put Gliscor to Sleep. This also makes it so that it is unable to set up Toxic Spikes. With Taunt, Gliscor is able to stop a great deal of pokémon from setting up Stealth Rock, the only problematic leads being Azelf and Aerodactyl. It can also shut down Smeargle completely and silence Ninjask to an extent with Taunt. The 88 Attack EVs guarantee a 2HKO on Max HP, Min Def (252/0) Lead Metagross. They also give Gliscor enough power to OHKO Salamence (and outspeed neutral speed Mence) after it switches into Stealth Rock. Hyper Cutter ensures that Salamence's Intimidate is stopped from working. Finally, the Yache Berry ensures Gliscor's survival against standard MixPert, allowing it to set up Stealth Rock and run away.