Voltorb is card #98 of 130 in Base Set 2 (2000), a Common illustrated by Keiji Kinebuchi. At about $0.61 it is the #107 most valuable card in the set. In a Base Set 2 booster it turns up about once every 6 packs. It is one of 40 Voltorb cards printed so far.
1999Base Set
2000Team Rocket
2003Skyridge
2007Secret Wonders
2012Boundaries Crossed
2016Evolutions
2019Hidden Fates
2023151

















See the full Base Set 2 card list
An ungraded Voltorb from Base Set 2 sells for about $0.61. A PSA 10 is worth more, roughly $7.93 by our estimate, and a PSA 9 around $2.44.
It is a Common, and it shows up about once every 6 Base Set 2 packs.
Keiji Kinebuchi drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Base Set 2 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.