Clefable (Plasma Storm 98/135)

Evolves from Clefairy

Abilities

Once during your turn (before your attack), you may flip a coin. If heads, search your deck for a card that evolves from 1 of your Pokémon and put it onto that Pokémon. (This counts as evolving that Pokémon.) Shuffle your deck afterward.

Attacks

Their ears are sensitive enough to hear a pin drop from over a mile away, so they're usually found in quiet places.