An amazing discovery!
Pokémon BREAK Evolution opens a new path to power that builds on a Pokémon’s existing strengths and creates all-new battling options! These new Pokémon BREAK come from twin worlds, home to Zoroark BREAK, Mega Mewtwo X, and Mega Mewtwo Y. One world of technology, one world of nature, and all the wonders of BREAK Evolution are yours to explore in the Pokémon TCG: XY—BREAKthrough expansion!
BREAKthrough and the Japanese equivalent Blue Shock ・Red Flash are the eighth expansions of the English XY Series and the Japanese XY Era, respectively, and are the first of XY BREAK. The set continues to feature Mega Evolution as powerful Pokémon-EX and centers around the Genetic Pokémon Mewtwo. It was released in Japan on September 26, 2015, and on November 4, 2015 in English. BREAKthrough contains 164 cards, while Blue Shock・Red Flash have 65 cards per set. The Korean release is formatted similar to the Japanese set, with the same name (albeit with Korean-translated titles), set size, and set icon, and was released on September 28, 2015.
The expansion is the first expansion to feature a new variant of cards: Pokémon BREAK. Pokémon BREAK is an additional type of evolution. When in play, the Pokémon BREAK card are placed sideways over the artwork of the existing Pokémon (of the same type of Pokémon) to give them an HP boost and new Abilities or attacks while still retaining the Abilities, attacks, Weaknesses, Resistances, and Retreat Costs of the original Pokémon.
BREAKthrough features 8 new Pokémon-EX, including 4 Mega Pokémon-EX, and introduces 6 Pokémon BREAK cards.
The prerelease card for this set is Chesnaught.