# Zweilous #85/114 — Steam Siege

## Summary

Zweilous is the awkward middle stage of the Deino line, and fans mostly remember it as the stepping stone to Hydreigon, one of Gen V's best-loved Dragons. Ken Sugimori illustrating an Uncommon is a draw for completionists, though in Steam Siege's deep pool it remains a modest mid-tier pull. A $0.24 modelled guide, up 20% over 30 days on 21 copies traded, says bulk, with 240 days of inventory on the board, and the economics stop there: a PSA 10 guides at $32, 132 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 | 85/114 |
| Rarity | Uncommon |
| Era | XY |
| Illustrator | Ken Sugimori |
| Release date | 2016-08-03 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | POKEMON |
| Stage | Stage1 |
| Evolves from | Deino |
| HP | 90 |
| Types | Dragon |
| Attack: Double Hit | cost Colorless — damage 20× — Flip 2 coins. This attack does 20 damage times the number of heads. |
| Attack: Power Breath | cost Psychic/Darkness/Colorless — damage 80 — Discard an Energy attached to this Pokémon. |
| Weakness | Fairy ×2 |
| Retreat | 3 |
| Legal | Standard no · Expanded yes |
| Pokédex entry | [Zweilous #634](https://cardboardalpha.com/pokemon/pokedex/zweilous) |
| Finishes | Normal, Reverse Holo |
| Languages | EN |

## Current stats

- Headline price: **$0.24** (ITEM_MEDIAN; modelled guide price) — as of 2026-10-22T22:54:43.176Z
- 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 2026-10-22T22:54:43.176Z
- Floor delivered ask: $1.61 — as of 2026-10-22T22:54:43.176Z
- Quant score: 83/100, regime EXHAUSTION — as of 2026-10-22T22:54:43.176Z — 3 of 11 inputs · 29% weight · -35% confidence

## Provenance

- Catalog — observed 2016-08-03T00:00:00Z, confidence 98%
- Live ask — observed 2026-10-22T18:36:42.466Z, confidence 90%
- Guide price (modelled) — observed 2026-10-22T00:00:00.000Z, confidence 90%
- Price statistic — observed 2026-10-19T17:54:18.346Z, confidence 90%
- Confirmed sale — observed 2026-10-19T13:40:05.573Z, confidence 85%
- Inventory count — observed 2026-10-19T17:54:18.336Z, confidence 70%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/steam-siege/zweilous-85)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Axy11-85%3AEN%3ANORMAL~NM)