You may have up to 4 Basic Pokémon cards in your deck with Unown in their names.
Attacks
Hidden Power
10 Damage
Abilities
[Join]
Pokémon Power
Once during your turn (before your attack), if you have Unown [J], Unown [O], Unown [I], and Unown Dragon on your Bench, you may search your deck for a Basic Pokémon or Evolution card. Show that card to your opponent, then put it into your hand. Shuffle your deck afterward.
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.