Once during your turn (before your attack), if this Pokémon is on your Bench, you may discard this Pokémon and all cards attached to it (this does not count as a Knock Out). If you do, draw a card.
This card was included in the Ancient Origins expansion, first released in the Japanese Bandit Ring expansion. In Japan, it was reprinted in the Premium Champion Pack as a Mirror Reverse Holofoil. It was reprinted again in Japan in The Best of XY subset.
Trivia
The Unown depicted spell NANDA?, which translates as What?.