This attack does 20 more damage times the amount of Metal Energy attached to this Pokémon.

自分の山札にある[鋼]エネルギーを1枚、このポケモンにつける。そして山札を切る。

Attach any number of Metal Energy cards from your discard pile to this Pokémon. (You can't use more than 1 GX attack in a game.)