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.
Cursed Shadow
Once during your turn (before your attack), if Chandelure is your Active Pokémon, you may put 3 damage counters on your opponent's Pokémon in any way you like.