Every Tentacruel card we price, most valuable first. Prices are what copies actually sold for, updated daily.
What a Tentacruel card is worth
The most valuable Tentacruel on this list is Tentacruel (H26) from Aquapolis at $174.30£131.19€153.50, and the 16 priced copies across 15 sets are worth $480£361€423 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.
Tentacruel is printed in Japanese as well: 14 cards across 11 sets, the most valuable of them Tentacruel from Wind from the Sea at $45£33.87€39.63. 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 Tentacruel sold for $2,762£2,078€2,432. 1st Edition and 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 Tentacruel 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: Aquapolis, Legendary Collection, Southern Islands.