Brock's Onix
Gym Heroes · #21/132
Brock's Onix (21/132), the Rare Holo from Gym Heroes, has an estimated ungraded market price of about $11–$15.
As of July 16, 2026 · tracked daily by Riffle · estimates, not financial advice
Image © The Pokémon Company, shown for identification.
About Brock's Onix
Brock's Onix is a Rare Holo (21/132) from the Pokémon Gym Heroes set, released August 14, 2000. Ungraded copies currently trade at an estimated market price of $11–$15. The artwork is by Benimaru Itoh. Riffle tracks its market price daily; graded (PSA) comps and full price history are available with Riffle.
Details
Other versions of Brock's Onix
Brock's Onix appears on 2 different cards across the sets Riffle tracks, at very different values. This page covers #21/132 from Gym Heroes; the collector number printed at the bottom of the card tells them apart.
- Brock's Onix#69/132 · Gym Heroes$5–$7Common
FAQ
How much is Brock's Onix (21/132) worth?
Brock's Onix (21/132), the Rare Holo from Gym Heroes, has an estimated ungraded market price of about $11–$15. Note: 1 other card named Brock's Onix exists across the sets Riffle tracks, at very different values; check the collector number.
Which Brock's Onix card is this, and how do I tell the versions apart?
This page covers Brock's Onix (21/132), the Rare Holo (about $11–$15) from Gym Heroes.
The other version: #69/132 from Gym Heroes (Common, about $5–$7).
The collector number printed at the bottom of the card is the reliable way to tell them apart.