Mewtwo is card #SM214 of 248 in SM Black Star Promos (2017), a Promo illustrated by kawayoo. At about $18.03 it is the #82 most valuable card in the set. It is one of 89 Mewtwo cards printed so far.
1999Base Set
2003Ruby & Sapphire
2006Holon Phantoms
2009Pokémon Rumble
2015BREAKthrough
2017Shining Legends
2019Unified Minds
2023Crown Zenith

















See the full SM Black Star Promos card list
An ungraded Mewtwo from SM Black Star Promos sells for about $18.03. A PSA 10 is worth more, roughly $90.15 by our estimate, and a PSA 9 around $41.47.
It is a Promo.
kawayoo drew the art for this card.