Brock's Onix
Gym Heroes - 21/132
Purchase price
Quantity
Purchase price
Quantity
Market prices
Brock's Onix 21/132 from Gym Heroes sells for $7.95 ungraded: the median of 5 completed sales over the last 7 days, as of October 3, 2026.
Graded population: PSA 126 copies (17.5% in 10), CGC 92 copies (6.5% in 10), and BGS 3 copies, as of October 1, 2026.
Ungraded
Median by period. Short periods can rest on a handful of sales: the count is shown next to each price, and prices marked “est.” are indicative.
Actual prices may vary.
Graded population report — Brock's Onix #21
Updated monthly · as of September 2026
PSA
| Grade | Pop |
|---|---|
| 10 | 22 |
| 9 | 44 |
| 8 | 35 |
| 7 | 14 |
| 6 | 3 |
| 5 | 7 |
| Authentic | 1 |
CGC
| Grade | Pop |
|---|---|
| Pristine 10 | 2 |
| Gem Mint 10 | 4 |
| 9.5 | 1 |
| 9 | 21 |
| 8.5 | 24 |
| 8 | 11 |
| 7.5 | 3 |
| 7 | 6 |
| 6.5 | 7 |
| 6 | 3 |
| 5.5 | 6 |
| Authentic | 4 |
BGS
| Grade | Pop |
|---|---|
| 9.5 | 1 |
| 9 | 1 |
| 8 | 1 |
Card details
Types
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Attacks
Flip a coin. If heads, the Defending Pokémon is now Paralyzed.
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.
Weaknesses
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