If your opponent has any Water Energy attached to any of his or her Pokémon, you may do 30 damage to any 1 Benched Pokémon instead. (Don't apply Weakness and Resistance for Benched Pokémon.)

Water Slide40+

You may move all Energy cards attached to Golduck to 1 of your Benched Pokémon. If you do, this attack does 40 damage plus 20 more damage.