Shellder is card #31 of 146 in XY (2014), a Common illustrated by Naoyo Kimura. At about $0.77 it is the #102 most valuable card in the set. In a XY booster it turns up about once every 9 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 XY sells for about $0.77. A PSA 10 is worth more, roughly $3.85 by our estimate, and a PSA 9 around $1.77.
It is a Common, and it shows up about once every 9 XY packs.
Naoyo Kimura drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open XY 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.