Gyarados δ from Holon Phantoms (8) is a Rare Holo Lightning Metal card.
HP 90 • Illustrator: Hajime Kusajima
Abilities
Delta Reactor (Poké-Body): As long as any Stadium card with Holon in its name is in play, each of your Pokémon that has δ on its card does 10 more damage to the Defending Pokémon (before applying Weakness and Resistance).
Attacks
Hyper Beam (20): Flip a coin. If heads, discard an Energy card attached to the Defending Pokémon.
Heavy Impact (80)
Rules
This Pokémon is both Lightning Metal type.
Weaknesses: Lightning ×2 • Retreat cost: Colorless, Colorless