You can't have more than 1 Shining Mew in your deck
Shining Mew
50 HP
Flash Search
Look at the top 3 cards of your deck. Choose 1, show it to your opponent, and place it in your hand. Place the other two in your deck and shuffle your deck.
Mystic Fire
Discard 1 Energy card attached to Shining Mew and flip a coin. If heads, the Defending Pokémon is now Confused. If tails, the Defending Pokémon is now Asleep. If you can't discard any Energy, this attack does nothing.