Brock's Onix

Gym Heroes · #21/132 · Rare · 2000

All 73 Onix cards ranked by value →

$8.98

Market price ▲ 3.3% (30d)

Prices as of Aug 22, 2026

21 1st Edition · 21

HP 70FightingBasicArt · Benimaru Itoh

590graded pop

15%gem rate

14.2×PSA 10 vs raw

-49%off ATH $16.53 · Aug 2026

+$11.12EV to grade — marginal

Market data

Printings & price history

21▲ 1.4% 7d$8.98

Low $7.47Mid $9.63

Loading chart…

Live listings

Buy it now on eBay

Loading live listings…

Live from eBay · affiliate links support CardPrice · see recent sold results →

Shop live eBay listings →Recent eBay sold results

Graded market

Graded values

PSA 10 report →updated 2026-08-22

Grade 6 est.$8.23

Grade 5 est.$6.93

Grade 4 est.$5.72

Grade 3 est.$4.76

Grade 2 est.$3.90

Grade 1 est.$3.29

Grades 1–6 are estimates modeled from the raw price — PSA/CGC/BGS 7–10 and Ungraded are live tracked market values.

PSA 10 price history$211.74

PSA 10 chart is building — graded values are tracked nightly, a new point appears each day.

Graded population census · updated 2026-07-07

PSA119 graded · 22 gem 10

12345678910

CGC79 graded · 6 gem 10

12345678910

Population data from PriceCharting, updated monthly.

More Onix cards all 73 ranked by value →

OnixLegendary Collection · 2002$0.59

OnixAquapolis · 2003$7.68

Onix Vending Machine cards Series 2 (Red) (Japanese)

OnixVending Machine cards Series 2 (Red) · 2026$65.95

OnixSouthern Islands · 2001$54.06

OnixUnseen Forces · 2005$0.89

OnixTeam Rocket Returns · 2004$0.98

Attacks

20Bind

Flip a coin. If heads, the Defending Pokémon is now Paralyzed.

Tunneling

If your opponent has any Benched Pokémon, choose up to 2 of them. This attack does 20 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.) Brock's Onix can't attack during your next turn.

How much is Brock's Onix #21/132 worth?

As of August 23, 2026, Brock's Onix #21/132 from Gym Heroes sells for around $8.98 in raw, ungraded condition. Across the 2 printings we track, copies run anywhere from $7.47 to $210.33 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $211.74, roughly 23.6x the raw price, while a PSA 9 sits near $22.12. 294 copies have been graded to date, and 18% of them came back a 10 — worth knowing before you pay grading fees.

These figures come from nightly market-data syncs verified against completed sales. Use the chart above to see the trend before you buy or sell.

Collecting Gym Heroes?Full master set guide — every card, chase list, and completion cost→