Every Gardevoir & Sylveon card we price, most valuable first. Prices are what copies actually sold for, updated daily.
The same Pokemon is also printed as Gardevoir, Mega Gardevoir and M Gardevoir, priced separately because the game treats them as different cards.
What a Gardevoir & Sylveon card is worth
The most valuable Gardevoir & Sylveon on this list is Gardevoir & Sylveon GX (205) (Alternate Full Art) from SM - Unbroken Bonds at $657.57£494.92€579.10, and the 4 priced copies across 1 sets are worth $1.0k£782€915 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.
Gardevoir & Sylveon is printed in Japanese as well: 4 cards across 1 sets, the most valuable of them Gardevoir & Sylveon GX from Night Unison at $448£337.19€394.54. 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 Gardevoir & Sylveon sold for $4,100£3,086€3,611. Rarities here include Secret Rare.
If you are trying to identify which Gardevoir & Sylveon 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: SM - Unbroken Bonds.