| 2026-07-26 | $4.50 | — | Raw | Brock's Onix 21/132 #21 Near Mint English | — |
| 2026-07-25 | $8.58 | — | Raw | Brock's Onix (21) #21 Near Mint English | — |
| 2026-07-24 | $17.48Outlier | — | Raw | Brock's Onix (21) #21 Near Mint English | — |
| 2026-07-22 | $8.00 | — | Raw | NM Brock's Onix - Non-Holo #21 Gym Heroes Pokemon TCG #21 | — |
| 2026-07-19 | $10.49 | — | Raw | Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited Near Mint 21/132 | — |
| 2026-07-19 | $7.50 | — | Raw | Brock's Onix (21) #21 Near Mint English | — |
| 2026-07-16 | $8.00 | — | Raw | Played (LP) Brock's Onix Non-Holo #21 Gym Heroes Pokemon TCG #21 | — |
| 2026-07-15 | $4.99 | — | Raw | Pokémon TCG Brock's Onix Gym Heroes 21/132 Unlimited Rare 21/132 | — |
| 2026-07-13 | $8.60 | — | Raw | Brock's Onix (21) #21 Near Mint English | — |
| 2026-07-12 | $7.12 | — | Raw | Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited Moderately Played 21/132 | — |
| 2026-07-12 | $0.99Outlier | — | Raw | 2000 POKEMON GYM HEROES #21 BROCK'S ONIX JH #21 | — |
| 2026-07-12 | $9.00 | — | Raw | Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited Lightly Played 21/132 | — |
| 2026-07-12 | $14.07 | — | Raw | Pokemon Cards: Gym Heroes Rare: Brock's Onix 21/132 #21 | — |
| 2026-07-11 | $8.81 | — | Raw | Brock's Onix - 21/132 - Pokemon Gym Heroes Unlimited Rare Card WOTC MP | — |
| 2026-07-10 | $15.00Outlier | — | Raw | Pokémon TCG Brock’s Onix 21/132 Gym Heroes WOTC Vintage 21/132 | — |
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