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Gym
Pokémon · Basic
Illustrated by Benimaru Itoh
Brock's Onix 21/132 Gym Heroes 1st Edition PSA Population
Pokémon · Basic
Illustrated by Benimaru Itoh
Brock's Onix #21 from Gym Heroes 1st Edition currently has 308 PSA graded copies, including 53 PSA 10s, for a 17.2% PSA gem rate. Its PSA population has increased by 1 copy 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 | 308+1 | 115 | 6 |
| Pristine / Black Label % | — | 0.87%-0.01% | 0% |
| Gem Rate | 17.2%-0.06% | 10.4%-0.09% | 16.7% |
| Perfect / Black Label | — | 0 | 0 |
| Pristine | — | 1 | — |
| 10 | 53 | 11 | 0 |
| 9.5 | — | 3 | 1 |
| 9 | 141 | 38 | 5 |
| 8.5 | 0 | 37 | 0 |
| 8 | 81+1 | 12 | 0 |
| 7.5 | 0 | 6 | 0 |
| 7 | 23 | 0 | 0 |
CGC total graded is the grader's reported population (115). The grade rows add up to 114.
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| 6.5 | 0 | 1 | 0 |
| 6 | 4 | 2 | 0 |
| 5.5 | 0 | 0 | 0 |
| 5 | 4 | 0 | 0 |
| 4.5 | 0 | 0 | 0 |
| 4 | 2 | 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 | — | 3 | — |
Market value
No market estimate yet.
