Brock's Onix

Gym Heroes · #21/132 · Rare · 2000

$14.02

1st Edition · 21 · Market price ▲ 6.6% (30d)

Prices as of Aug 14, 2026

21 1st Edition · 21

HP 70FightingBasicArt · Benimaru Itoh

590graded pop

15%gem rate

14.8×PSA 10 vs raw

-47%off ATH $15.69 · Jul 2026

+$11.40EV to grade — marginal

Market data

Printings & price history

1st Edition · 21▲ 1.9% 7d$14.02

Low $8.66Mid $19.36

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Graded market

Graded values

PSA 10 report →updated 2026-08-14

Grade 6 est.$14.65

Grade 5 est.$12.34

Grade 4 est.$10.18

Grade 3 est.$8.48

Grade 2 est.$6.94

Grade 1 est.$5.86

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

1st Edition · PSA 10 price history$285.00

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

Graded population census · updated 2026-07-07

1st Edition

PSA294 graded · 53 gem 10

12345678910

CGC98 graded · 9 gem 10

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Population data from PriceCharting, updated monthly.

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 14, 2026, Brock's Onix #21/132 from Gym Heroes sells for around $8.86 in raw, ungraded condition. Across the 2 printings we track, copies run anywhere from $6.00 to $210.33 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $207.46, roughly 23.4x the raw price, while a PSA 9 sits near $22.14. 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→