The Gastly 57/144 Skyridge Reverse Holo card is a common Pokémon card from the Skyridge set. It features the character Gastly with 50 HP and is illustrated by Kyoko Umemoto. Manufactured by The Pokémon Company, this Basic stage Pokémon card is in English language with a Reverse Holo finish, making it a sought-after collectible for Pokémon TCG enthusiasts.