Darkrai (4) [Great Encounters]

[1] Darkness Roar (10) You may have your opponent switch the Defending Pokemon with 1 of his or her Benched Pokemon.

[1DD] Sleep Hole (40+) If the Defending Pokemon is Asleep, this attack does 40 damage plus 40 more damage. If the Defending Pokemon is not Asleep, that Pokemon is now Asleep.