Pokémon sets › Gym Heroes › Brock's Onix
Brock's Onix #21
Low confidence 35th most valuable of 133 priced cards in Gym Heroes
Rough guide — limited market data — pre-2010 condition spread.
Built from United States market data — recent sales of this card in that market, refreshed weekly.
A PSA 10 of this card sells for about 24.2× the ungraded price — $8.66 raw against $209.51 graded.
We began recording US prices as their own series in August 2026, so there are not yet enough readings to chart a US trend for this card. It will appear here as they accumulate.
US guide prices, with the UK market alongside — updated 30 August 2026. Each market is priced from real market data in that market. Estimates for collection tracking — not an appraisal or a quote.
Check recent US sold prices on eBay →
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