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.
Swift50
This attack's damage isn't affected by Weakness, Resistance, Poké-Powers, Poké-Bodies, or any other effects on the Defending Pokémon.