Darkrai

It can lull people to sleep and make them dream. It is active during nights of the new moon.

Poke-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.

Dark Slumber (10): At the end of your opponent's next turn, the Defending Pokémon is now Asleep.

Dark Resolve (40): If the Defending Pokémon is Asleep, remove 4 damage counters from Darkrai.