# Onix #42/112 — FireRed & LeafGreen

## Summary

Onix is a Kantō Rock Snake that fans remember as Brock's first Gym partner, which keeps even a modest Basic Uncommon in quiet demand. Kouki Saitou's name adds a small draw for illustrator collectors, though this was a mid-tier pull in a remake set, not a chase. At a $2.82 modelled guide, with 1 copy traded in 30 days, this printing is almost entirely collector premium, since the same card plays for $0.15 out of Mega Evolution; PSA does not split this card’s population by finish, so no gem rate can be read for it.

## Identity

| Field | Value |
| --- | --- |
| Set | FireRed & LeafGreen |
| Number | 42/112 |
| Rarity | Uncommon |
| Era | EX |
| Illustrator | Kouki Saitou |
| Release date | 2004-09-01 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | POKEMON |
| Stage | Basic |
| HP | 80 |
| Types | Fighting |
| Attack: Rock Throw | cost Fighting — damage 10 |
| Attack: Tunneling | cost Fighting/Colorless — Choose up to 2 of your opponent's Benched Pokémon. This attack does 10 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.) Onix can't attack during your next turn. |
| Weakness | Water ×2 |
| Retreat | 3 |
| Legal | Standard no · Expanded no |
| Pokédex entry | [Onix #095](https://cardboardalpha.com/pokemon/pokedex/onix) |
| Finishes | Normal, Reverse Holo |
| Languages | EN |

## Current stats

- Headline price: **$2.82** (ITEM_MEDIAN; modelled guide price) — as of 2026-11-04
- Headline basis: MODELLED_GUIDE — The venue’s published daily market guide, which the venue itself declares MODELLED. Nothing is confirmed to have traded at it, no copy is listed at it, and it is not our estimate — it is theirs.
- 24h change: n/a · 7d change: n/a — as of 2026-11-04
- Floor delivered ask: $3.87 — as of 2026-11-04T14:51:24.304Z
- Quant score: 21/100, regime ILLIQUID_UNKNOWN — as of 2026-11-04T14:51:24.304Z — 3 of 11 inputs · 29% weight · -35% confidence

## Provenance

- Catalog — observed 2004-09-01T00:00:00Z, confidence 98%
- Live ask — observed 2026-10-26T04:13:26.065Z, confidence 90%
- Guide price (modelled) — observed 2026-11-04T00:00:00.000Z, confidence 90%
- Price statistic — observed 2026-10-26T04:13:24.990Z, confidence 90%
- Confirmed sale — observed 2026-09-27T04:43:37.790Z, confidence 85%
- Inventory count — observed 2026-10-26T04:13:24.989Z, confidence 70%
- Population census — observed 2026-09-09T18:38:43.441Z, confidence 60%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/firered-leafgreen/onix-42)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Aex6-42%3AEN%3ANORMAL~NM)