Nuzleaf.

If the Defending Pokémon tries to attack during your opponent's next turn, your opponent flips a coin. If tails, that attack does nothing.

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.