Brock's Geodude is card #68 of 132 in Gym Challenge (2000), a Common illustrated by Ken Sugimori. At about $3.51 it is the #107 most valuable card in the set. In a Gym Challenge booster it turns up about once every 6 packs. It is one of 24 Geodude cards printed so far.
1999Fossil
2000Gym Heroes
2001Neo Revelation
2003Dragon
2007Mysterious Treasures
2014Flashfire
2017Guardians Rising
2021Fusion Strike

















See the full Gym Challenge card list
An ungraded Brock's Geodude from Gym Challenge sells for about $3.51. A PSA 10 is worth more, roughly $45.63 by our estimate, and a PSA 9 around $14.04.
It is a Common, and it shows up about once every 6 Gym Challenge packs.
Ken Sugimori drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Gym Challenge 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.