Basic Metal Energy Pokemon Card (Diamond & Pearl Series, Unnumbered) English Language/Standard Cardback/Tournament Legal A single Basic Metal Energy card for use with the Pokemon Trading Card Game Features the "Diamond and Pearl" energy design. This card is English-language with a standard cardback, so it is league/tournament legal. This card originally comes from a pre-constructed deck, and is unnumbered. Also known as "Steel" energy by some collectors and players.