Poké-POWER: Darkness Shade
Once during your turn, when you put Darkrai from your hand onto your Bench, you may choose 1 of the Defending Pokémon. That Pokémon is now Asleep.
[D] Dark Slumber: 10
At the end of your opponent’s next turn, the Defending Pokémon is now Asleep.
[D][D][C] Dark Resolve: 40
If the Defending Pokémon is Asleep, remove 4 damage counters from Darkrai.
It can lull people to sleep and make them dream. It is active during nights of the new moon.