Voltorb is card #64 of 147 in Aquapolis (2003), a Uncommon illustrated by Yukiko Baba. At about $19.99 it is the #149 most valuable card in the set. In an Aquapolis booster it turns up about once every 20 packs. It is one of 40 Voltorb cards printed so far.
1999Base Set
2003Skyridge
2007Secret Wonders
2012Boundaries Crossed
2016Evolutions
2019Hidden Fates
2023151
2026Ascended Heroes

















See the full Aquapolis card list
An ungraded Voltorb from Aquapolis sells for about $19.99. A PSA 10 is worth more, roughly $260 by our estimate, and a PSA 9 around $79.96.
It is a Uncommon, and it shows up about once every 20 Aquapolis packs.
Yukiko Baba drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Aquapolis booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.