# Koga's Koffing #79/132 — Gym Challenge

## Summary

Koga's Koffing is a bulk common from Gym Challenge, where the real chase sat with the holographic Gym Leaders. Ken Sugimori's name on the credit line and Koga's status among Kanto's Gym Leaders give Gym-set completionists a small, steady reason to hunt a copy. The modelled guide sits at $0.88, down 10% over 30 days on 43 copies traded, with only 15 days of inventory on the board; a ACE 10 brings $61, 69 times raw, but PSA does not split this card’s population by finish, so no gem rate can be read for it, with original packs long past any pull-rate math.

## Identity

| Field | Value |
| --- | --- |
| Set | Gym Challenge |
| Number | 79/132 |
| Rarity | Common |
| Era | WOTC |
| Illustrator | Ken Sugimori |
| Release date | 2000-10-16 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | POKEMON |
| Stage | Basic |
| HP | 40 |
| Types | Grass |
| Attack: Smelly Gas | cost Grass — damage 10 — Flip a coin. If heads, this attack does 10 damage to each Benched Pokémon (including your own). (Don't apply Weakness and Resistance for Benched Pokémon.) |
| Weakness | Psychic x2 |
| Retreat | 1 |
| Legal | Standard no · Expanded no |
| Pokédex entry | [Koffing #109](https://cardboardalpha.com/pokemon/pokedex/koffing) |
| Finishes | Normal |
| Languages | EN |

## Current stats

- Headline price: **$0.88** (ITEM_MEDIAN; modelled guide price) — as of 2026-11-08
- 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 2026-11-08
- Floor delivered ask: $1.74 — as of 2026-11-08T11:09:05.723Z
- Quant score: 28/100, regime FALLING — as of 2026-11-08T11:09:05.723Z — 5 of 11 inputs · 49% weight · -26% confidence

## Provenance

- Catalog — observed 2000-10-16T00:00:00Z, confidence 98%
- Live ask — observed 2026-11-08T11:06:17.441Z, confidence 90%
- Price statistic — observed 2026-11-08T11:06:17.441Z, confidence 90%
- Confirmed sale — observed 2026-10-26T02:42:57.800Z, confidence 85%
- Inventory count — observed 2026-11-08T11:06:17.441Z, confidence 70%
- Guide price (modelled) — observed 2026-11-08T00:00:00.000Z, confidence 60%
- Population census — observed 2026-09-18T15:53:53.642Z, confidence 60%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/gym-challenge/kogas-koffing-79)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Agym2-79%3AEN%3ANORMAL~NM)