Gliscor

Gliscor is one of the best Pokemon to break bulkier team archetypes like stall and balance. Gliscor's ability Poison Heal allows it to be immune to status effects when poisoned while also providing it with passive recovery, which is useful alongside reliable recovery in Roost. Since Gliscor's low Attack makes it unable to threaten many Pokemon, it needs to run Swords Dance in order to break through bulkier threats. Gliscor acts as a solid switch-in to common foes like Excadrill, Assault Vest Tornadus-T, Heatran, Magnezone, and Clefable that lack Ice coverage. Gliscor does, however, struggle to deal with faster Pokemon that can threaten to KO it, which includes Keldeo, Mega Metagross, and Weavile.