Flip a coin. If heads, this attack does 10 damage plus 10 more damage.
Choose 1 of your opponent's Pokémon. This attack does 30 damage to that Pokémon. This attack's damage isn't affected by Weakness, Resistance, Poké-Powers, Poké-Bodies, or any other effects on that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)