Every Phantump card we price, most valuable first. Prices are what copies actually sold for, updated daily.
The same Pokemon is also printed as Hop's Phantump, priced separately because the game treats them as different cards.
What a Phantump card is worth
The most valuable Phantump on this list is Phantump from XY Base Set at $1.54£1.16€1.36, and the 14 priced copies across 14 sets are worth $6£5€6 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.
Phantump is printed in Japanese as well: 13 cards across 12 sets, the most valuable of them Phantump (Cinderace Stamped) from Sword & Shield Family Pokemon Card Game at $5£3.76€4.40. 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 Phantump sold for $299.99£225.79€264.19. reverse holo printings are priced separately from the standard card, because they do not trade at the same money.
If you are trying to identify which Phantump 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: XY Base Set, World Championship Decks, SM - Guardians Rising.