Brock's Onix

Gym Heroes · #21/132 · Rare · 2000

$8.72
Market price ▲ 1.8% (30d)
Prices as of Jul 26, 2026
211st Edition · 21
HP 70FightingBasicArt · Benimaru Itoh
392graded pop
16%gem rate
8.7×PSA 10 vs raw
-41%off ATH $14.42 · Jul 2026
−$1.04EV to grade — don't

Printings & price history

21▼ 0.3% 7d$8.72
Low $5.52Mid $8.66

Loading chart…

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 values

updated 2026-07-26
Grade 6 est.$8.15
Grade 5 est.$6.86
Grade 4 est.$5.66
Grade 3 est.$4.72
Grade 2 est.$3.86
Grade 1 est.$3.26

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$121.50

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

Graded population census · updated 2026-07-07

PSA294 graded · 53 gem 10
CGC98 graded · 9 gem 10

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 July 27, 2026, Brock's Onix #21/132 from Gym Heroes sells for around $8.72 in raw, ungraded condition. Across the 2 printings we track, copies run anywhere from $5.52 to $210.33 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $121.50, roughly 13.9x the raw price, while a PSA 9 sits near $22.29. 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.

Other printings of Brock's Onix 1

Brock's Onix #69 Gym Heroes
Brock's Onix
Gym Heroes · #69/132