Dark SandslashわるいサンドパンUnlimited

Poké-BodyPoison Payback

If Dark Sandslash is your Active Pokémon and is damaged by an opponent's attack (even if Dark Sandslash is Knocked Out), the Attacking Pokémon is now Poisoned.

This attack's damage isn't affected by Weakness, Resistance, Poké-Powers, Poké-Bodies, or any other effects on the Defending Pokémon.