Once during your turn (before your attack), if this Pokémon is your Active Pokémon, you may look at the top 5 cards of your deck, reveal a Trainer card you find there, and put it into your hand. Then, shuffle the other cards back into your deck, and this Pokémon is now Asleep.
Disclaimer: The following data is based on sale history from a third party source. Data is updated about every 5 days. This data does not serve as a value guarantee.