As long as this Pokémon is your Active Pokémon, whenever you attach an Energy from your hand to it, it is now Asleep.

• Hypno Roll

  100

  This attack can be used if this Pokémon is Asleep. If it is not Asleep, this attack does nothing.

NO. 775 Drowsing Pokémon HT: 1'04" WT: 43.9 lbs. It is born asleep, and it dies asleep. All its movements are apparently no more than the results of it tossing and turning in its dreams.