Pokemon XY Base Set Booster Box
Factory Sealed Booster Box, containing 36 Packs (each containing 10 Pokemon cards and code card)
XY is the name given to the first expansion of the XY Series of the Pokémon Trading Card Game. Collection X and Collection Y are the names given to the two subsets that make up the first expansion block in the Pokémon Card Game XY era and is based on Pokémon X and Y. Both releases are the first main expansions to feature the Fairy type and the incorporation of Mega Pokémon. The English packs will continue to contain 10 cards and 1 code card for the Pokémon Trading Card Game Online. The English XY expansion will release at least 146 cards.
The English XY expansion will contain 6 Pokémon-EX, including Collection X's Venusaur-EX and Xerneas-EX, and Collection Y's Blastoise-EX and Yveltal-EX. The set also debuts 2 Mega Evolution cards, introducing Mega versions of Venusaur-EX and Blastoise-EX. Mega Pokémon can only be evolved from Pokémon-EX, and Mega Evolution ends the player's turn.