From Bulbapedia, the community-driven Pokémon encyclopedia.

A coin, in the Pokémon Trading Card Game, is used in a variety of ways, from Energy Cards to Pokémon attacks.

Types of coins

A coin can be a real, monetary coin, or a special metal or cardboard disk with a Pokémon on it, or any small, flat object that has the same chance of landing on either of two sides when flipped. In Brazil, most people use a dice instead of a coin.