The 2001 Pokemon Pioneer Flying Ace Lenticular Promo #31 is a vintage collectible card game item from the Pokémon franchise. Manufactured by Nintendo and professionally graded by Professional Sports Authenticator (PSA), this card features the character Gengar in a holo finish. With its unique lenticular design and rarity as a promo card, this standard-sized Pokémon card is a sought-after item for collectors and fans of the Pokémon Trading Card Game.