Dusclops.

Flip a coin. If heads, put 2 damage counters on each of your opponent's Pokémon. If tails, put 2 damage counters on 1 of your Pokémon.

Does 10 damage to each of your opponent's Benched Pokémon that doesn't have a Retreat Cost. (Don't apply Weakness and Resistance for Benched Pokémon.)