Koffing is card #109 of 165 in 151 (2023), a Common illustrated by Shibuzoh.. At about $0.34 it is the #128 most valuable card in the set. In a 151 booster it turns up about once every 15 packs. It is one of 29 Koffing cards printed so far.
1999Base Set
2002Expedition Base Set
2005Deoxys
2009Rising Rivals
2011Call of Legends
2016Evolutions
2021Shining Fates
2023Crown Zenith

















An ungraded Koffing from 151 sells for about $0.34. A PSA 10 is worth more, roughly $1.19 by our estimate, and a PSA 9 around $0.68.
It is a Common, and it shows up about once every 15 151 packs.
Shibuzoh. drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open 151 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.