Lileep.

Search your deck for Omanyte, Kabuto, Aerodactyl, Lileep, or Anorith and put up to 2 of them onto your Bench. Shuffle your deck afterward. Treat the new Benched Pokémon as Basic Pokémon.

If your opponent has any Evolved Pokémon in play, choose 1 of them and flip a coin. If heads, remove the highest Stage Evolution card on that Pokémon and have your opponent shuffle it into his or her deck.