# Koffing #114/165 — Expedition Base Set

## Summary

Koffing is a bulk common from Expedition, a set where commons were pack filler rather than chase pulls, so demand comes only from Gen I completionists who like the gas-bag Poison type and from fans of Kusajima's long-running Pokémon card work. It stays a quiet, affordable binder fill. The modelled guide sits at $3.92, down 29% over 30 days on 51 copies traded, with 740 days of inventory on the board; a ACE 10 brings $114, 29 times raw, but PSA does not split this card’s population by finish, so no gem rate can be read for it.

## Identity

| Field | Value |
| --- | --- |
| Set | Expedition Base Set |
| Number | 114/165 |
| Rarity | Common |
| Era | WOTC |
| Illustrator | Hajime Kusajima |
| Release date | 2002-09-15 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | POKEMON |
| Stage | Basic |
| HP | 50 |
| Types | Grass |
| Attack: Ram | cost Colorless — damage 10 |
| Attack: Confusion Gas | cost Grass — Flip a coin. If heads, the Defending Pokémon is now Confused. |
| Weakness | Psychic x2 |
| Retreat | 1 |
| Legal | Standard no · Expanded no |
| Pokédex entry | [Koffing #109](https://cardboardalpha.com/pokemon/pokedex/koffing) |
| Finishes | Normal, Reverse Holo |
| Languages | EN |

## Current stats

- Headline price: **$3.92** (ITEM_MEDIAN; modelled guide price) — as of 2026-11-10
- 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: -14.20% — as of 2026-11-10
- Floor delivered ask: $2.95 — as of 2026-11-10T22:36:00.739Z
- Quant score: 42/100, regime CAPITULATION — as of 2026-11-10T22:36:00.739Z — 6 of 11 inputs · 66% weight · -17% confidence

## Provenance

- Catalog — observed 2002-09-15T00:00:00Z, confidence 98%
- Live ask — observed 2026-11-08T05:11:14.124Z, confidence 90%
- Guide price (modelled) — observed 2026-11-10T00:00:00.000Z, confidence 90%
- Price statistic — observed 2026-11-08T05:11:12.285Z, confidence 90%
- Confirmed sale — observed 2026-11-07T01:57:24.270Z, confidence 85%
- Inventory count — observed 2026-11-08T05:11:12.282Z, confidence 70%
- Population census — observed 2026-09-09T22:21:47.797Z, confidence 60%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/expedition-base-set/koffing-114)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Aecard1-114%3AEN%3ANORMAL~NM)