Sharpedo ex 104

Before doing damage, you may switch 1 of your opponent's Benched Pokémon with the Defending Pokémon. If you do, this attack does 20 damage to the new Defending Pokémon. Your opponent chooses the Defending Pokémon to switch. Damage: 20

You may discard a Darkness Energy attached to Sharpedo ex. If you do, this attack does 60 damage plus 20 more damage and discard 1 Energy card attached to the Defending Pokémon. Damage: 60+