Shellder is card #19 of 83 in Generations (2016), a Common illustrated by Naoyo Kimura. At about $0.57 it is the #108 most valuable card in the set. In a Generations booster it turns up about once every 7 packs. It is one of 14 Shellder cards printed so far.
1999Fossil
2002Expedition Base Set
2004FireRed & LeafGreen
2007Secret Wonders
2014XY
2016BREAKpoint
2017Sun & Moon
2020Sword & Shield

















See the full Generations card list
An ungraded Shellder from Generations sells for about $0.57. A PSA 10 is worth more, roughly $2.85 by our estimate, and a PSA 9 around $1.31.
It is a Common, and it shows up about once every 7 Generations packs.
Naoyo Kimura drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Generations 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.