Eevee-GX is card #SM242 of 248 in SM Black Star Promos (2017), a Promo illustrated by aky CG Works. At about $21.22 it is the #71 most valuable card in the set. It is one of 90 Eevee cards printed so far.
1999Jungle
2003Aquapolis
2008Majestic Dawn
2012Dark Explorers
2015Ancient Origins
2017Sun & Moon
2019Team Up
2022Astral Radiance

















See the full SM Black Star Promos card list
An ungraded Eevee-GX from SM Black Star Promos sells for about $21.22. A PSA 10 is worth more, roughly $106 by our estimate, and a PSA 9 around $48.81.
It is a Promo.
aky CG Works drew the art for this card.