What a warehouse find! This trading card game, produced by Bandai back in 2006, allows players to test one another in challenging questions and math quizzes! One box contains 15 booster packs, and each booster pack contains six randomly packed "brain" cards. This trading card series has a total of 150 possible cards to trade and collect. All text is in Japanese. Please note that these are trading cards and are individually sealed and randomly packed before shipment to HobbyLink Japan. As a result we are unable to honor requests for individual or specific cards, nor can we promise you which one(s) you will receive in a pack. Please order only if you are willing to accept any of the possible types.