Brock's Onix 21/132
Pokemon card from Gym Heroes · released Aug 14, 2000
Brock's Onix is a Rare Fighting-type Basic Pokemon card, number 21/132 in Gym Heroes (released Aug 14, 2000), illustrated by Benimaru Itoh. Its TCGplayer market price was ~$17.36 for the 1st edition finish on Oct 30, 2026. Between Oct 1 and Oct 30, 2026, its 1st Edition TCGplayer market price went from ~$16.94 to ~$17.36, up 2.5%.
Prices by finish
| Finish | PriceMarket price | Low | Mid | Buy |
|---|---|---|---|---|
| 1st Edition | ~$17.36 | ~$8.66 | ~$21.37 | CardNexuseBayBuy 1st Edition on TCGplayer (opens in a new tab)Search eBaySearch AmazonCardNexus |
| Unlimited | ~$11.67 | ~$7.00 | ~$10.05 | CardNexuseBayBuy Unlimited on TCGplayer (opens in a new tab)Search eBaySearch AmazonCardNexus |
TCGplayer market prices per finish, as of Oct 30, 2026. A guide, not an appraisal; condition and grading change real-world value. Buy links are affiliate links.
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Sealed Gym Heroes products
TCGplayer market prices (via TCGCSV), Oct 30, 2026.
![Gym Heroes Booster Box [1st Edition]](https://static.pokemoncardlist.net/images/cards/sealed-208707.avif)
![Gym Heroes Booster Box [Unlimited Edition]](https://static.pokemoncardlist.net/images/cards/sealed-208708.avif)
![Gym Heroes Booster Pack [1st Edition]](https://static.pokemoncardlist.net/images/cards/sealed-138137.avif)
Booster Pack [1st Edition]~$495.00Buy on CardNexusSearch eBayBuy on TCGplayer Gym Heroes Booster Pack [1st Edition] (opens in a new tab)Search eBaySearch AmazonCardNexus
Card details
| Set | Gym Heroes |
| Number | 21/132 |
| Rarity | Rare |
| Type | Fighting |
| HP | 70 |
| Stage | Basic |
| Artist | Benimaru Itoh |
| Format legality | Not legal in Standard or Expanded |
| Finishes | 1st Edition · Unlimited |
What the codes mean
- Card number21/132Card 21 of the 132 in the main Gym Heroes list.
- Set symbol
The small Gym Heroes symbol identifies the set. Cards from before Scarlet & Violet print a symbol instead of a set code. - Regulation markNo regulation mark. Cards before Sword & Shield (2020) have none.
- RarityRare: a black star.
- Illustrator“Illus. Benimaru Itoh” names the artist who made the art.
Attacks & abilities
Bind20Flip a coin. If heads, the Defending Pokémon is now Paralyzed.
Tunneling20If 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.
Weakness: Grass x2 · Retreat cost: 2
Other Brock's Onix printings
More Gym Heroes cards
All Onix cards · Gym Heroes price list
Card data via TCGdex and pokemontcg.io, updated Oct 31, 2026. Prices: TCGplayer market prices via TCGCSV, Oct 30, 2026.