Twilight Masquerade · #166
Boomerang Energy is a Energy card from the Twilight Masquerade expansion of the Pokémon Trading Card Game (card #166, Uncommon).
As long as this card is attached to a Pokémon, it provides Colorless Energy. If this card is discarded by an effect of an attack used by the Pokémon this card is attached to, attach this card from your discard pile to that Pokémon after attacking.