Mr. Stone's Project (Emerald 79/106)

Rules

You can play only one Supporter card each turn. When you play this card, put it next to your Active Pokémon. When your turn ends, discard this card.

Search your deck for up to 2 Basic cards, show them to your opponent, and put them into your hand. Shuffle your deck afterward. Or, search your discard pile for up to 2 Basic cards, show them to your opponent, and put them into your hand.