Theme decks are mostly seen only alongside English-language releases and are seldom released in Japan, released only alongside debut sets such as Base Set and Neo Genesis, as well as alongside the original Gym sets. Most theme decks are designed with a specific strategy (such as Special Conditions) or theme (such as starter Pokémon) in mind. Pokémon Brilliant Diamond and Shining PearlĪ Theme Deck, previously known as a Preconstructed Theme Deck, is a playing deck of Pokémon Trading Card Game cards sold pre-packaged alongside mainstream card sets.
