The product is a rare and highly sought-after Pokémon trading card called Ancient Mew. It was released in 1999 as a promotional item for the movie Pocket Monsters The Movie: Revelation Lugia in Japan. The card is unique in that it features full art and is written in Japanese. It is a psychic-type creature and has a holographic finish. The card comes with a booklet that provides additional information about the movie. There were two versions of the card released, one with an error and one corrected.