This attack does 20 damage to 1 of your opponent's Benched Pokémon for each damage counter on that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
If this Pokémon is in the Active Spot and is damaged by an attack from your opponent's Pokémon (even if this Pokémon is Knocked Out), put 3 damage counters on the Attacking Pokémon.During your opponent's next turn, the Defending Pokémon can't retreat.