If this Baby Pokémon is your Active Pokémon and your opponent tries to attack, your opponent flips a coin (before doing anything else required in order to use that attack). If tails, your opponent's turn ends without an attack.
Flip a coin until you get a tails. This attack does 50 damage for each heads
If your opponent's Active Pokémon has a Pokémon Tool attached to it, this attack does 70 more damage.