Brock's Onix Gym Heroes #21
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 $12.88 ungraded, with a PSA 10 worth around $341 — 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 2 July 2026.
Price by variant
TCGplayer market price per printing — reverse holo, 1st edition and unlimited often differ sharply.
| Grade | Relative value | Price |
|---|---|---|
| PSA 10 | 2 sold$341$290–$392 | |
| PSA 9 | 2 sold$110$93–$126 | |
| PSA 8 | $13$10–$14 |
Price history · raw near-mint
Recent sold prices
Real completed hammer prices from Fanatics Collect weekly and premier auctions, refreshed periodically. Grade read from the listing title.
Population across graders
Should you grade it?
after ~$73.4 grading fee → 26.5× the raw value
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $340.90 | $73.4 | +$255 | 26.5× |
| PSA 9 | $109.56 | $71.09 | +$26 | 8.5× |
| 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% | $341.00 |
| 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.
We'll email you when this card's value crosses your target.
Where to buy
Cross-market prices
65% spreadCurrently 65% cheaper on Cardmarket 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.
🇪🇺 Cardmarket price · Europe
33% cheaper than the USCard 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 2 July 2026, Brock's Onix from Gym Heroes is worth approximately $12.88 ungraded (near-mint), and around $341 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 $341 — roughly 26× the raw ungraded value of $12.88.
Should I grade my Brock's Onix?
A PSA 10 sells for about $341 versus $12.88 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 $12.88 ungraded.