# Koga's Grimer #78/132 — Gym Challenge

## Summary

Koga's Grimer is a Gym Challenge common, the sort of pull that filled out a binder page while the Gym Leader's trainer cards drew the attention. Ken Sugimori's name on a Wizards-era card gives it a small draw for completists, and Gen I Poison types always keep a quiet following. The modelled guide sits at $4.53 with 17 copies traded in 30 days; a CGC 10 brings $22, 4.7 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 | 78/132 |
| Rarity | Common |
| Era | WOTC |
| Illustrator | Ken Sugimori |
| Release date | 2000-10-16 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | POKEMON |
| Stage | Basic |
| HP | 50 |
| Types | Grass |
| Attack: Sludge Grip | cost Grass — damage 10 — If your opponent has any Benched Pokémon, flip a coin. If heads, choose 1 of your opponent's Benched Pokémon and switch it with the Defending Pokémon. The new Defending Pokémon is now Poisoned. |
| Attack: Sludge Toss | cost Grass/Colorless — damage 20 |
| Weakness | Psychic x2 |
| Retreat | 1 |
| Legal | Standard no · Expanded no |
| Pokédex entry | [Grimer #088](https://cardboardalpha.com/pokemon/pokedex/grimer) |
| Finishes | Normal |
| Languages | EN |

## Current stats

- Headline price: **$4.53** (ITEM_MEDIAN; modelled guide price) — as of 2026-10-17T05:55:24.747Z
- 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 2026-10-17T05:55:24.747Z
- Floor delivered ask: $3.95 — as of 2026-10-17T05:55:24.747Z
- Quant score: 52/100, regime ILLIQUID_UNKNOWN — as of 2026-10-17T05:55:24.747Z — 2 of 11 inputs · 16% weight · -35% confidence

## Provenance

- Catalog — observed 2000-10-16T00:00:00Z, confidence 98%
- Live ask — observed 2026-10-03T08:53:35.777Z, confidence 90%
- Guide price (modelled) — observed 2026-10-05T06:54:16.721Z, confidence 75%
- Price statistic — observed 2026-09-02T15:00:47.347Z, confidence 70%
- Population census — observed 2026-09-13T11:52:34.556Z, confidence 60%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/gym-challenge/kogas-grimer-78)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Agym2-78%3AEN%3ANORMAL~NM)