Brock's Onix

Gym Heroes · #21/132 · Rare · 2000

All 73 Onix cards ranked by value →

$8.64

Market price ▼ 3.8% (30d)

Prices as of Sep 25, 2026

21 1st Edition · 21

HP 70FightingBasicArt · Benimaru Itoh

598graded pop

16%gem rate

21.2×PSA 10 vs raw

-52%off ATH $18.08 · Sep 2026

+$13.66EV to grade — marginal

Market data

Printings & price history

21▼ 1.4% 7d$8.64

Low $6.96Mid $8.36

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Graded market

Graded values

PSA 10 report →updated 2026-09-25

Grade 6 est.$9.02

Grade 5 est.$7.59

Grade 4 est.$6.26

Grade 3 est.$5.22

Grade 2 est.$4.27

Grade 1 est.$3.61

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$183.52

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

Graded population census · updated 2026-09-17

PSA119 graded · 22 gem 10

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CGC80 graded · 6 gem 10

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Population data from PriceCharting, updated monthly.

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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 September 26, 2026, Brock's Onix #21/132 from Gym Heroes sells for around $8.64 in raw, ungraded condition. Across the 2 printings we track, copies run anywhere from $6.96 to $210.23 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $183.52, roughly 21.2x the raw price, while a PSA 9 sits near $22.21. 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→