Shellos East Sea (79) Reverse Holofoil - Rising Rivals

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

Choose 1 of your opponent's Pokémon that has any damage counters on it. This attack does 20 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)