Mewtwo-EX is card #62 of 162 in BREAKthrough (2015), a Rare Holo EX illustrated by Planeta. At about $13.45 it is the #21 most valuable card in the set. In a BREAKthrough booster it turns up about once every 62 packs. It is one of 89 Mewtwo cards printed so far.
1999Base Set
2003Ruby & Sapphire
2006Holon Phantoms
2009Pokémon Rumble
2015BREAKthrough
2019Unified Minds
2023Crown Zenith
202630th Celebration

















See the full BREAKthrough card list
An ungraded Mewtwo-EX from BREAKthrough sells for about $13.45. A PSA 10 is worth more, roughly $67.25 by our estimate, and a PSA 9 around $30.93.
It is a Rare Holo EX, and it shows up about once every 62 BREAKthrough packs.
Planeta drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open BREAKthrough booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.