# Cloyster #20/83 — Generations

## Summary

Cloyster is a Gen I favorite whose spiky shell and Explosion-era reputation earned it a loyal following well beyond its battle record. In Generations it was a mid-tier Uncommon, a coin-flip attacker rather than a meta contender, so demand is nostalgia-driven and Masakazu Fukuda's name adds a modest bonus. A $0.30 modelled guide, down 9% over 30 days on 21 copies traded, says bulk, with only 36 days of inventory on the board, and the economics stop there: a PSA 10 guides at $34, 114 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 | Generations |
| Number | 20/83 |
| Rarity | Uncommon |
| Era | XY |
| Illustrator | Masakazu Fukuda |
| Release date | 2016-02-22 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | POKEMON |
| Stage | Stage1 |
| Evolves from | Shellder |
| HP | 100 |
| Types | Water |
| Attack: Clamp Crush | cost Water/Colorless — damage 30 — Flip a coin. If heads, your opponent's Active Pokémon is now Paralyzed and discard an Energy attached to that Pokémon. |
| Attack: Spike Cannon | cost Water/Water/Colorless — damage 30× — Flip 5 coins. This attack does 30 damage times the number of heads. |
| Weakness | Grass ×2 |
| Retreat | 3 |
| Legal | Standard no · Expanded yes |
| Pokédex entry | [Cloyster #091](https://cardboardalpha.com/pokemon/pokedex/cloyster) |
| Finishes | Normal, Reverse Holo |
| Languages | EN |

## Current stats

- Headline price: **$0.30** (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: 0.00% — as of 2026-11-10
- Floor delivered ask: $1.74 — as of 2026-10-16T21:41:43.326Z
- Quant score: 25/100, regime FLOOR_FORMING — as of 2026-11-09T22:37:21.807Z — 5 of 11 inputs · 57% weight · -21% confidence

## Provenance

- Catalog — observed 2016-02-22T00:00:00Z, confidence 98%
- Live ask — observed 2026-11-09T10:58:04.252Z, confidence 90%
- Guide price (modelled) — observed 2026-11-10T00:00:00.000Z, confidence 90%
- Price statistic — observed 2026-11-09T10:58:02.688Z, confidence 90%
- Confirmed sale — observed 2026-11-08T16:41:56.147Z, confidence 85%
- Inventory count — observed 2026-11-09T10:58:02.688Z, confidence 70%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/generations/cloyster-20)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Ag1-20%3AEN%3ANORMAL~NM)