Misty's Cloyster is card #29 of 132 in Gym Heroes (2000), a Rare illustrated by Ken Sugimori. At about $26.98 it is the #31 most valuable card in the set. In a Gym Heroes booster it turns up about once every 35 packs. It is one of 14 Cloyster 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 Cloyster from Gym Heroes sells for about $26.98. A PSA 10 is worth more, roughly $351 by our estimate, and a PSA 9 around $108.
It is a Rare, and it shows up about once every 35 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.