The XY BREAKthrough expansion set was released in November 2015 and contains 164 cards. This is the first set to feature the BREAK evolution type… the set contains 6 BREAK cards. The BREAKthrough set also contains 19 EX Pokemon, 4 of which are Mega evolution type, and 2 secret rare cards.
BREAKthrough Set List
Complete list of cards in the Pokemon XY BREAKthrough expansion set.