![Mystery Energy (Premium Trainer Box 018/018)](https://static.tcgcollector.com/build/images/default-card-image-640x892.0d69bedb.png)
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This card can only be attached to Psychic Pokémon. This card provides Psychic Energy, but only while this card is attached to a Psychic Pokémon. The Retreat Cost of the Pokémon this card is attached to is Colorless Colorless less. (If this card is attached to anything other than a Psychic Pokémon, discard this card.)