Reshiram & Charizard-GX is card #SM201 of 248 in SM Black Star Promos (2017), a Promo illustrated by Ryota Murayama. At about $175 it is the #10 most valuable card in the set. It is one of 108 Charizard cards printed so far.
1999Base Set
2003Dragon
2007Power Keepers
2012Boundaries Crossed
2017Burning Shadows
2020Champion's Path
2023151
2026Ascended Heroes

















See the full SM Black Star Promos card list
An ungraded Reshiram & Charizard-GX from SM Black Star Promos sells for about $175. A PSA 10 is worth more, roughly $873 by our estimate, and a PSA 9 around $401.
It is a Promo.
Ryota Murayama drew the art for this card.