Reshiram & Charizard-GX is card #217 of 214 in Unbroken Bonds (2019), a Rare Rainbow illustrated by aky CG Works. At about $242 it is the #3 most valuable card in the set. In an Unbroken Bonds booster it turns up about once every 1,016 packs. It is one of 108 Charizard cards printed so far.
1999Base Set
2003Dragon
2007Power Keepers
2012Boundaries Crossed
2017Burning Shadows
2019Unbroken Bonds
2020Champion's Path
2023151

















See the full Unbroken Bonds card list
An ungraded Reshiram & Charizard-GX from Unbroken Bonds sells for about $242. A PSA 10 is worth more, roughly $1,212 by our estimate, and a PSA 9 around $558.
It is a Rare Rainbow, and it shows up about once every 1,016 Unbroken Bonds packs.
aky CG Works drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Unbroken Bonds booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.