Mewtwo V-UNION is card #SWSH159 of 307 in SWSH Black Star Promos (2019), a Promo illustrated by Akira Egawa. At about $10.22 it is the #70 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
2019Unified Minds
2023Crown Zenith
202630th Celebration

















See the full SWSH Black Star Promos card list
An ungraded Mewtwo V-UNION from SWSH Black Star Promos sells for about $10.22. A PSA 10 is worth more, roughly $51.10 by our estimate, and a PSA 9 around $23.51.
It is a Promo.
Akira Egawa drew the art for this card.