Pokémon sets › Gym Heroes [1st-Edition] › Brock's Onix [1st-Edition]
![Gym Heroes [1st-Edition] Brock's Onix [1st-Edition] Pokémon card](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym%20Heroes/brocks-onix-1st-edition-21.jpg)
Brock's Onix [1st-Edition] #21
Ungraded
£14.78
PSA 10
£215.46
Guide prices in GBP for the UK market, updated 21 June 2026. Estimates for collection tracking — not an appraisal or a quote.
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![Brock's Golem [1st-Edition]](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym%20Heroes/brocks-golem-1st-edition-20.jpg)
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![Brock's Sandslash [1st-Edition]](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym%20Heroes/brocks-sandslash-1st-edition-23.jpg)
![Brock's Zubat [1st-Edition]](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym%20Heroes/brocks-zubat-1st-edition-24.jpg)
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![Lt. Surge [1st-Edition]](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym Heroes/lt-surge-1st-edition-17.jpg)
![Erika [1st-Edition]](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym%20Heroes/erika-1st-edition-16.jpg)
![Erika's Victreebel [1st-Edition]](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym%20Heroes/erikas-victreebel-1st-edition-26.jpg)
![Lt. Surge's Electabuzz [1st-Edition]](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym Heroes/lt-surges-electabuzz-1st-edition-27.jpg)
![Brock [1st-Edition]](https://pub-4919690d36064f94806d666a71d998a0.r2.dev/Gym%20Heroes/brock-1st-edition-15.jpg)