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Gym
Pokémon · Basic
Illustrated by Benimaru Itoh
Brock's Onix 21/132 Gym Heroes Unlimited PSA Population
Pokémon · Basic
Illustrated by Benimaru Itoh
Brock's Onix #21 from Gym Heroes Unlimited currently has 126 PSA graded copies, including 22 PSA 10s, for a 17.5% PSA gem rate. Its PSA population has remained unchanged over the last 10 days.
PSA, CGC, and BGS data as of Oct 27, 2026.
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Graded population
| Grade | PSA | CGC | BGS |
|---|---|---|---|
| Total Graded | 126 | 97 | 3 |
| Pristine / Black Label % | — | 2.1%-0.04% | 0% |
| Gem Rate | 17.5% | 6.2%-0.1% | 33.3% |
| Perfect / Black Label | — | 0 | 0 |
| Pristine | — | 2 | — |
| 10 | 22 | 4 | 0 |
| 9.5 | — | 1 | 1 |
| 9 | 45 | 21 | 1 |
| 8.5 | 0 | 25 | 0 |
| 8 | 34 | 12 | 1 |
| 7.5 | 0 | 5+1 | 0 |
| 7 | 14 | 6 | 0 |
CGC total graded is the grader's reported population (97). The grade rows add up to 96.
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| 6.5 | 0 | 7 | 0 |
| 6 | 4 | 3 | 0 |
| 5.5 | 0 | 6 | 0 |
| 5 | 7 | 0 | 0 |
| 4.5 | 0 | 0 | 0 |
| 4 | 0 | 0 | 0 |
| 3.5 | 0 | 0 | 0 |
| 3 | 0 | 0 | 0 |
| 2.5 | 0 | 0 | 0 |
| 2 | 0 | 0 | 0 |
| 1.5 | 0 | 0 | 0 |
| 1 | 0 | 0 | 0 |
| 0 | — | 4 | — |
Market value
No market estimate yet.
