Misty's Dewgong is card #54 of 132 in Gym Challenge (2000), a Uncommon illustrated by Ken Sugimori. At about $8.28 it is the #68 most valuable card in the set. In a Gym Challenge booster it turns up about once every 14 packs. It is one of 19 Dewgong cards printed so far.
1999Base Set
2000Gym Challenge
2002Neo Destiny
2004FireRed & LeafGreen
2007Mysterious Treasures
2009Supreme Victors
2019Unbroken Bonds
2023151

















See the full Gym Challenge card list
An ungraded Misty's Dewgong from Gym Challenge sells for about $8.28. A PSA 10 is worth more, roughly $108 by our estimate, and a PSA 9 around $33.12.
It is a Uncommon, and it shows up about once every 14 Gym Challenge packs.
Ken Sugimori drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Gym Challenge 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.