Smoochum (Aquapolis 61/147)
Energy Kiss

Flip a number of coins equal to the number of Energy cards attached to the Defending Pokémon. This attack does 10 damage times the number of heads.

Card rule

If your Active Pokémon is a Baby Pokémon and your opponent announces an attack, your opponent flips a coin (before doing anything else). If tails, your opponent's turn ends.