Illustrator Kouki Saitou
The Defending Pokémon can't retreat during your opponent's next turn. Put 5 damage counters on the Defending Pokémon at the end of your opponent's next turn.
The Defending Pokémon is now Poisoned. This attack does 20 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)