Brock's Onix Gym Heroes #21
Sold prices, not asking · Updated 5 July 2026
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Brock's Onix is a Rare Pokémon card from Gym Heroes (#21), illustrated by Benimaru Itoh. It's a Basic Fighting-type Pokémon with 70 HP, weak to Grass ×2. Its current blended market value is $13.16 ungraded, with a PSA 10 worth around $343 — a gem-mint grading premium of roughly 26× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.
Prices last updated 5 July 2026.
| Grade | Relative value | Price |
|---|---|---|
| PSA 10pop 53 | 2 sold$343$292–$395 | |
| PSA 9pop 140 | 2 sold$110$94–$127 | |
| PSA 8pop 75 | $13$10–$14 |
Price history · Raw
Recent sold prices
Real completed sale prices from Fanatics Collect — weekly and premier auctions plus marketplace Buy It Now sales, refreshed periodically. Grade read from the listing title.
Population across graders
Only 18% of 297 PSA-graded Brock's Onix copies are a gem-mint 10 (53 of 297) — the rest grade lower.
Full grade breakdown (7 grades)
Full grade breakdown (5 grades)
Should you grade it?
Only 17.8% of copies gem (PSA 10 best case +$256); most land at PSA 9 or below.
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $343.05 | $73.42 | +$256 | 26.1× |
| PSA 9 | $110.25 | $71.09 | +$26 | 8.4× |
| PSA 8 | $12.93 | $70.12 | −$70 | 1.0× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 297 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 17.8% | $343.00 |
| PSA 9 | 47.1% | $110.00 |
| PSA ≤8 | 35% | $13.00 |
Net = graded value − raw value − grading cost (tier fee + ~$20 round-trip shipping), using PSA fees as of 2026-06-28; the paused PSA Value tier is excluded so this isn't overstated. Gem rate is estimated from cumulative PSA population, which skews toward nicer, resubmitted copies — so it overstates the true grade rate. Treat it as a guide, not a guarantee.
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Where to buy
Market dataCross-market spread, EU price, momentum & community buzz
Cross-market prices
6% spreadCurrently 6% cheaper on TCGplayer than PriceCharting. These are independent market prices for the same card — a wide gap can mean a buying opportunity. Informational only, not arbitrage advice.
Market signal
Derived from this card's 90-day price history, recent trend and cross-market price gap. Informational, not advice.
Card text
Card details
Other Brock's Onix cards
There are 2 different Brock's Onix printings — make sure you're valuing the right one. This is Gym Heroes #21 (Rare).
More from Gym Heroes
Frequently asked questions
How much is Brock's Onix (Gym Heroes #21) worth?
As of 5 July 2026, Brock's Onix from Gym Heroes is worth approximately $13.16 ungraded (near-mint), and around $343 in PSA 10 gem mint. Values are blended from real Cardmarket, eBay sold and TCGplayer prices and update daily.
What is the PSA 10 price for Brock's Onix?
A PSA 10 (gem mint) Brock's Onix from Gym Heroes is worth around $343 — roughly 26× the raw ungraded value of $13.16.
Should I grade my Brock's Onix?
A PSA 10 sells for about $343 versus $13.16 raw — roughly a 26× uplift. Grading is worth it when that premium comfortably beats the grading fee and the card is clean enough to have a real shot at a 10. See the "Should you grade it?" estimate above for net profit per grade.
Is Brock's Onix rare?
Brock's Onix is a Rare card from Gym Heroes (card #21), illustrated by Benimaru Itoh. Its current blended market value is $13.16 ungraded.