Koga's Koffing is card #79 of 132 in Gym Challenge (2000), a Common illustrated by Ken Sugimori. At about $2.78 it is the #114 most valuable card in the set. In a Gym Challenge booster it turns up about once every 6 packs. It is one of 29 Koffing cards printed so far.
1999Base Set
2000Gym Challenge
2002Expedition Base Set
2005Deoxys
2009Rising Rivals
2011Call of Legends
2016Evolutions
2021Shining Fates

















See the full Gym Challenge card list
An ungraded Koga's Koffing from Gym Challenge sells for about $2.78. A PSA 10 is worth more, roughly $36.14 by our estimate, and a PSA 9 around $11.12.
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.