Melmetal GX - SM178 - SM Black Star Promo Tweet Buy This Product Details Set: SM Black Star Promo Card Number: SM178 Rarity: Promotional Retreat Cost: 4 Weakness: Fire HP: 220 Stage: Stage 1 Card Type: Metal Resistance: Psychic Name: Melmetal Attack #1:  Metal Blast: 110+ damage. This attack does 20 more damage times the amount of [M] Energy attached to this Pokemon. Attack #2: [M] Iron Force GX. Attach any number of [M] Energy cards from your discard pile to this Pokemon. Manufacturer: The Pokemon Company Ability: Hard Coat. This Pokemon takes 30 less damage from attacks (after applying Weakness and Resistance).