# Shellos #28/114 — Steam Siege

## Summary

Shellos is a Sinnoh Water-type common, the sort of pull that fills a binder slot and rarely a deck. Its charm is the cheerful sea slug design that Diamond & Pearl fans still remember, with Sanosuke Sakuma credited, so demand stays small, nostalgic and completist-driven. A $0.22 modelled guide, down 8% over 30 days on 21 copies traded, says bulk, with 68 days of inventory on the board, and the economics stop there: a PSA 10 brings $41, 186 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 | Steam Siege |
| Number | 28/114 |
| Rarity | Common |
| Era | XY |
| Illustrator | Sanosuke Sakuma |
| Release date | 2016-08-03 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | POKEMON |
| Stage | Basic |
| HP | 70 |
| Types | Water |
| Attack: Rain Splash | cost Water — damage 10 |
| Weakness | Grass ×2 |
| Retreat | 2 |
| Legal | Standard no · Expanded yes |
| Pokédex entry | [Shellos #422](https://cardboardalpha.com/pokemon/pokedex/shellos) |
| Finishes | Normal, Reverse Holo |
| Languages | EN |

## Current stats

- Headline price: **$0.22** (ITEM_MEDIAN; modelled guide price) — as of 2026-11-12
- 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: +4.80% — as of 2026-11-12
- Floor delivered ask: $0.99 — as of 2026-10-18T22:02:16.184Z
- Quant score: 23/100, regime FLOOR_FORMING — as of 2026-11-11T22:49:42.230Z — 5 of 11 inputs · 57% weight · -21% confidence

## Provenance

- Catalog — observed 2016-08-03T00:00:00Z, confidence 98%
- Live ask — observed 2026-11-10T13:03:55.268Z, confidence 90%
- Guide price (modelled) — observed 2026-11-12T00:00:00.000Z, confidence 90%
- Price statistic — observed 2026-11-10T13:03:55.268Z, confidence 90%
- Confirmed sale — observed 2026-11-09T21:05:00.363Z, confidence 85%
- Inventory count — observed 2026-11-10T13:03:55.268Z, confidence 70%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/steam-siege/shellos-28)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Axy11-28%3AEN%3ANORMAL~NM)