Every Dewgong card we price, most valuable first. Prices are what copies actually sold for, updated daily.
What a Dewgong card is worth
The most valuable Dewgong on this list is Dewgong (H6) from Skyridge at $141.99£106.87€125.05, and the 19 priced copies across 17 sets are worth $474£357€417 together. Most of that sits in a handful of printings: the older the set and the scarcer the print run, the wider the gap to the rest.
Dewgong is printed in Japanese as well: 18 cards across 14 sets, the most valuable of them Dewgong from Mysterious Mountains at $58.14£43.76€51.20. Switch the list above to Japanese to read those, or to Both to rank the two catalogues against each other.
The highest PSA 10 on record for Dewgong sold for $2,525£1,900€2,224. 1st Edition and reverse holo printings are priced separately from the standard card, because they do not trade at the same money. Rarities here include Illustration Rare.
If you are trying to identify which Dewgong you have, the set name is printed on the card and the collector number sits in the bottom corner. Open the card here and the page carries every printing of it, the graded prices, and whether grading the copy is worth the fee. Sets to start with: Skyridge, Legendary Collection, EX FireRed & LeafGreen.