Dewgong is card #45 of 123 in Mysterious Treasures (2007), a Uncommon illustrated by Masakazu Fukuda. At about $3.17 it is the #84 most valuable card in the set. In a Mysterious Treasures booster it turns up about once every 11 packs. It is one of 19 Dewgong cards printed so far.
1999Base Set
2002Neo Destiny
2004FireRed & LeafGreen
2007Mysterious Treasures
2009Supreme Victors
2019Unbroken Bonds
2023151
2026Perfect Order

















See the full Mysterious Treasures card list
An ungraded Dewgong from Mysterious Treasures sells for about $3.17. A PSA 10 is worth more, roughly $25.36 by our estimate, and a PSA 9 around $8.88.
It is a Uncommon, and it shows up about once every 11 Mysterious Treasures packs.
Masakazu Fukuda drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Mysterious Treasures 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.