Every Iono's Voltorb card we price, most valuable first. Prices are what copies actually sold for, updated daily.
What a Iono's Voltorb card is worth
The most valuable Iono's Voltorb on this list is Iono's Voltorb (Cosmos Holo) from Prize Pack Series Cards at $0.32£0.24€0.28, and the 2 priced copies across 2 sets are worth $1£0€1 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.
Iono's Voltorb is printed in Japanese as well: 2 cards across 2 sets, the most valuable of them Iono's Voltorb (Mirror Holo) from Start Deck 100 Battle Collection at $12.99£9.78€11.44. 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 Iono's Voltorb sold for $110£82.79€96.87. 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 Iono's Voltorb 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: Prize Pack Series Cards, Journey Together.