Shellder is card #90 of 165 in 151 (2023), a Common illustrated by Nelnal. At about $0.32 it is the #145 most valuable card in the set. In a 151 booster it turns up about once every 15 packs. It is one of 14 Shellder cards printed so far.
1999Fossil
2002Expedition Base Set
2004FireRed & LeafGreen
2007Secret Wonders
2014XY
2017Sun & Moon
2020Sword & Shield
2023151

















An ungraded Shellder from 151 sells for about $0.32. A PSA 10 is worth more, roughly $1.12 by our estimate, and a PSA 9 around $0.64.
It is a Common, and it shows up about once every 15 151 packs.
Nelnal 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.