Reshiram-GX is card #SM137 of 248 in SM Black Star Promos (2017), a Promo illustrated by PLANETA Otani. At about $11.00 it is the #119 most valuable card in the set. It is one of 40 Reshiram cards printed so far.
2011BW Black Star Promos
2013Legendary Treasures
2015Roaring Skies
2017Shining Legends
2018Dragon Majesty
2019Cosmic Eclipse
2022Silver Tempest
2024Stellar Crown

















See the full SM Black Star Promos card list
An ungraded Reshiram-GX from SM Black Star Promos sells for about $11.00. A PSA 10 is worth more, roughly $55.00 by our estimate, and a PSA 9 around $25.30.
It is a Promo.
PLANETA Otani drew the art for this card.