Mewtwo is card #XY100 of 211 in XY Black Star Promos (2013), a Promo illustrated by match. At about $33.19 it is the #67 most valuable card in the set. It is one of 89 Mewtwo cards printed so far.
1999Base Set
2003Ruby & Sapphire
2006Holon Phantoms
2009Pokémon Rumble
2013Legendary Treasures
2015BREAKthrough
2019Unified Minds
2023Crown Zenith

















See the full XY Black Star Promos card list
An ungraded Mewtwo from XY Black Star Promos sells for about $33.19. A PSA 10 is worth more, roughly $266 by our estimate, and a PSA 9 around $92.93.
It is a Promo.
match drew the art for this card.