Ariados

Does 10 damage plus 30 more damage for each Special Condition affecting the Defending Pokémon.

The Defending Pokémon is now Asleep and Poisoned. Before applying this effect, you may switch 1 of your opponent's Benched Pokémon with 1 of the Defending Pokémon. If you do, the new Defending Pokémon is now Asleep and Poisoned. Your opponent chooses the Defending Pokémon to switch.