Pokémon sets › Gym Heroes › Brock's Onix
Illus. Benimaru Itoh · © Pokémon / Nintendo / Creatures / GAME FREAK. Shown for identification.
Brock's Onix 21/132
Gym Heroes · Rare · illustrated by Benimaru Itoh
What Brock's Onix 21 is worth
Brock's Onix 21/132 sells for about $17.21 ungraded in near-mint condition. It is the 43rd most valuable card in Gym Heroes, and a small part of the set's total value. The typical (median) Rare in this set goes for $18.37, so this card sells at 94% of that. Among all 28 Onix cards, it ranks 7th by price.
Brock's Onix price by printing
| Printing | Price |
|---|---|
| 1stEdition | $17.21 |
| unlimited | $11.08 |
| Any printing (Europe) | $10.75 €9.62 |
| Cheapest listing (Europe) | $2.07 €1.85 |
Recent Brock's Onix sales
| Average sale price (Cardmarket) | USD |
|---|---|
| Last 30 days | $11.05 |
| Last 7 days | $11.88 |
| Last day | $19.55 |
Euro prices converted at the European Central Bank rate of 2026-10-30 (1 EUR = 1.1172 USD).
Brock's Onix card details
| Set | Gym Heroes (Gym, G1) |
| Number | 21/132 |
| Rarity | Rare |
| Card type | Basic Fighting |
| HP | 70 |
| Attacks | Bind Fighting, Fighting · 20 damage Tunneling Fighting, Fighting, Fighting · 20 damage |
| Weakness | Grass x2 |
| Retreat cost | 2 |
| Illustrator | Benimaru Itoh |
| Released | August 14, 2000 |
| Printings | Normal, 1st Edition Normal |
How to tell you have this card
Look at the bottom of the card: it should read 21/132 next to the set code G1, and the rarity is Rare. The illustrator credit reads Benimaru Itoh. Not sure which set your card is from? Compare the symbol with our set symbol guide.
Other Onix cards
Legendary Collection 84
Aquapolis 98
Unseen Forces 65
Team Rocket Returns 69
FireRed & LeafGreen 42
Sandstorm 71
All 28 Onix cards with prices →
More valuable Gym Heroes cards
- Sabrina's Gengar 14: $550
- Erika's Dragonair 4: $389
- Blaine's Moltres 1: $243
- Rocket's Scyther 13: $243
- Rocket's Moltres 12: $228
- Misty 18: $203
- Lt. Surge's Fearow 7: $200
- Rocket's Snorlax 33: $189
All Gym Heroes chase cards → · Full Gym Heroes card list
Prices in US dollars: TCGplayer market prices (via pokemontcg.io) where recent, otherwise the Cardmarket trend (via TCGdex) converted at the day's ECB rate. Ungraded, near-mint. Prices change daily; check the live listing before you buy or sell.