Misty's Shellder is card #89 of 132 in Gym Heroes (2000), a Common illustrated by Ken Sugimori. At about $3.50 it is the #104 most valuable card in the set. In a Gym Heroes booster it turns up about once every 6 packs. It is one of 14 Shellder cards printed so far.
1999Fossil
2000Gym Heroes
2002Expedition Base Set
2004FireRed & LeafGreen
2007Secret Wonders
2014XY
2017Sun & Moon
2020Sword & Shield

















See the full Gym Heroes card list
An ungraded Misty's Shellder from Gym Heroes sells for about $3.50. A PSA 10 is worth more, roughly $45.50 by our estimate, and a PSA 9 around $14.00.
It is a Common, and it shows up about once every 6 Gym Heroes packs.
Ken Sugimori drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Gym Heroes 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.