The Gastly 57/144 Skyridge Reverse Holo is a Pokémon TCG card featuring the character Gastly with an HP of 50. This common card from the Skyridge set, illustrated by Kyoko Umemoto, is a basic Pokémon card manufactured by The Pokémon Company. The reverse holo finish adds a unique shine to the card, making it a sought-after collectible for Pokémon card enthusiasts and fans of the game.