The Diamond and Pearl expansion features over 120 cards, including more than 50 brand-new Pokémon for players to collect for the very first time. With the Mysterious Treasure expansion, Nintendo have added an extra 25 pokemon to the Diamond and Pearl universe!

The first English set to include the new fourth generation Pokemon such as Dialga and Palkia from the Diamond and Pearl videogames.

Several new rules are introduced to the Pokemon Trading Card Game with this release, for example the original poison-pokemon from previous releases are now categorised as psychic as opposed to grass type Pokemon, altering the gameplay of players who favour poison type pokemon and significantly boosting the roster for players who prefer psychic types. The symbol for this set is a circle with a quarter-moon shape within it encased inside a pentagon pointing downward.

In Mysterious Treasures, players will discover more amazing Pokémon for the very first time. New Fossils that evolve into powerful Pokémon… Legendary Psychic Pokémon that are even more powerful when played together… Pokémon with Berries that give them extra protection… and additional Pokémon LV. X all come together to make Mysterious Treasures worth seeking!