- Card Name
- Brock's Onix (21)
- Current Price
- $12.61
- Price Range
- $12.60 – $12.62
- Set
- Gym Heroes
- Game
- Pokemon
- Rarity
- Rare
- Card Number
- 021/132
- Variant
- 1st Edition
- Era
- Modern
- Type
- normal
- PSA 10 Price
- $405.00
- PSA 9 Price
- $17.50
- PSA 8 Price
- $10.50
- Volatility
- Extreme
- EUR Price
- €6.96
- Last Updated
- June 1, 2026
Grading & Population Snapshot
- PSA Total Population
- 115
- PSA 10 Population
- 22
- PSA 10 Chance
- 0.2%
- Grade Difficulty
- Very Hard
- PSA 10 Value
- $405.00
- Estimated PSA 10 Market Cap
- $8,910
| Period | Change |
|---|---|
| 24h | -26.9% |
| 7d | -0.4% |
| 90d | +232.5% |
| 180d | +324.6% |
| 1 Year | +345.2% |
Raw & Graded Price Snapshot
| Condition / Grade | Price | 7d | 30d | Recent Sales |
|---|---|---|---|---|
| Raw / Ungraded | $12.61 | -0.4% | 0.0% | N/A |
| PSA 10 | $405.00 | N/A | N/A | See sold listings |
| PSA 9 | $17.50 | N/A | N/A | See sold listings |
| PSA 8 | $10.50 | N/A | N/A | See sold listings |
PSA 10 Gem Rate: 0.2% (115 total graded)
Grading premium: PSA 10 is worth 3112% more than raw.
Marketplace Price Comparison
| Source | Price | Basis | Action |
|---|---|---|---|
| Guardian Estimate | $12.61 | Blended market value | View price history |
| TCGPlayer | $12.61 | Marketplace price | Check listings |
| Cardmarket | €6.96 | European market price | Compare markets |
Sources tracked: tcgplayer_market, justtcg.
How Guardian Calculates This Price
Guardian combines marketplace prices, recent sold listings, graded-card estimates, and cross-market checks into one daily card value. We separate raw and graded prices where data is available, ignore obvious outliers, and update card pages as new market data arrives.
Track, Grade, or Sell This Card
- Add this card to your collection to track value over time.
- Check grading ROI before submitting to PSA, BGS, or CGC.
- Compare selling options for Pokemon cards.
- Scan another card for instant identification and pricing.
Track Brock's Onix (21) price trends, view grading values, and get market alerts on Guardian TCG. Updated daily with data from multiple sources.
More Cards from Gym Heroes
Sabrina's Gengar — $600.87- Sabrina's Gengar — $496.69
Brock's Onix — $202.50
Blaine's Moltres — $200.00
Misty — $168.22
Misty (18) — $167.78
Rocket's Hitmonchan — $128.71
Rocket's Hitmonchan — $128.71
Brock's Rhydon — $121.79
Misty's Seadra — $119.34
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Related Pages
- Brock's Onix (21) Price Chart & History
- Cards Similar to Brock's Onix (21)
- Brock's Onix (21) Investment Analysis
- Brock's Onix (21) PSA 10 vs PSA 9 vs Raw — Grade Value Comparison
- Is Brock's Onix (21) worth grading?
- Should you grade Brock's Onix (21)? — Full analysis
- Brock's Onix (21) Condition Prices (LP/MP/HP)
- Brock's Onix (21) PSA Population Report
- Gym Heroes Set Price Guide
- Pokemon Hub
- Pokemon Price Guide
- Rare Pokemon Cards
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- Pokemon Market Movers Today
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Frequently Asked Questions
How much is Brock's Onix (21) from Gym Heroes worth?
Brock's Onix (21) from Gym Heroes is currently worth $12.61 in 2026. The price has changed -0.4% over the last 7 days. Prices are updated daily from multiple sources.
Is Brock's Onix (21) worth grading?
Brock's Onix (21) has a 0.2% gem rate (chance of PSA 10). A PSA 10 is worth $405.00 compared to $12.61 raw. The low gem rate means only pristine copies should be submitted.
How rare is Brock's Onix (21) in Gym Heroes?
Brock's Onix (21) is a Rare card from the Gym Heroes set in Pokemon. 115 copies have been graded by PSA.
Is Brock's Onix (21) going up in value?
Brock's Onix (21) has decreased 0.4% in the last 7 days and decreased 0.0% in 30 days. Current Guardian Estimate: $12.61.
How many Brock's Onix (21) have been PSA graded?
115 copies of Brock's Onix (21) have been submitted to PSA for grading. The PSA 10 gem rate is 0.2%. PSA 10 copies currently sell for $405.00.
Where can I buy Brock's Onix (21)?
You can compare prices and buy Brock's Onix (21) on TCGPlayer, eBay, and CardMarket. Guardian TCG tracks live prices from all three sources — current Guardian Estimate: $12.61.
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How much is Brock's Onix (21) from Gym Heroes worth?
Brock's Onix (21) from Gym Heroes is currently worth $12.61 in 2026. The price has changed -0.4% over the last 7 days. Prices are updated daily from multiple sources.
Is Brock's Onix (21) worth grading?
Brock's Onix (21) has a 0.2% gem rate (chance of PSA 10). A PSA 10 is worth $405.00 compared to $12.61 raw. The low gem rate means only pristine copies should be submitted.
How rare is Brock's Onix (21) in Gym Heroes?
Brock's Onix (21) is a Rare card from the Gym Heroes set in Pokemon. 115 copies have been graded by PSA.
Is Brock's Onix (21) going up in value?
Brock's Onix (21) has decreased 0.4% in the last 7 days and decreased 0.0% in 30 days. Current Guardian Estimate: $12.61.
How many Brock's Onix (21) have been PSA graded?
115 copies of Brock's Onix (21) have been submitted to PSA for grading. The PSA 10 gem rate is 0.2%. PSA 10 copies currently sell for $405.00.
Where can I buy Brock's Onix (21)?
You can compare prices and buy Brock's Onix (21) on TCGPlayer, eBay, and CardMarket. Guardian TCG tracks live prices from all three sources — current Guardian Estimate: $12.61.