7. Pokémon Super Secret Battle “No. 1 Trainer” – Promo Holographic Card
Another promo card, this Super Secret Battle trainer card was only given to an estimated seven players in 1999 during a country-wide tournament in Japan. The finals of the tournament were a secret. Players could only find out about the location after winning one of these cards in one of seven regional tournaments. This particular version of the card is rated aGEM MINT 10 by the PSA, adding to its value. Part of what makes the card desirable is the strange art, where you can spot not only a galactic Mewtwo, but also the Pokémon Trading Card logo on the front. Not a very common design!
