# Professor Sycamore #114/114 — Steam Siege

## Summary

Professor Sycamore was the XY-era Supporter that let a deck reset its whole hand and dig for seven fresh cards, which made it a format staple and a working player's card as much as a collector's. Yusuke Ohmura's name and the Ultra Rare full-art treatment draw the binder crowd on top of that. The modelled guide sits at $14, up 1% over 30 days on 71 copies traded, with 25 days of inventory on the board; a PSA 10 brings $179, 13 times raw, but a 35% gem rate against $85 of fees makes grading a losing trade.

## Identity

| Field | Value |
| --- | --- |
| Set | Steam Siege |
| Number | 114/114 |
| Rarity | Ultra Rare |
| Era | XY |
| Illustrator | Yusuke Ohmura |
| Release date | 2016-08-03 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | TRAINER |
| Subtype | Supporter |
| Legal | Standard no · Expanded yes |
| Finishes | Holo |
| Languages | EN |

## Current stats

- Headline price: **$14.08** (ITEM_MEDIAN; modelled guide price) — as of 2026-10-18T06:36:09.492Z
- 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: -6.10% — as of 2026-10-18T06:36:09.492Z
- Floor delivered ask: $13.92 — as of 2026-10-18T06:36:09.492Z
- Quant score: 58/100, regime MARKUP — as of 2026-10-18T06:36:09.492Z — 9 of 11 inputs · 90% weight · -5% confidence

## Provenance

- Catalog — observed 2016-08-03T00:00:00Z, confidence 98%
- Live ask — observed 2026-10-16T12:51:47.546Z, confidence 90%
- Guide price (modelled) — observed 2026-10-17T00:00:00.000Z, confidence 90%
- Price statistic — observed 2026-10-12T23:26:12.249Z, confidence 90%
- Confirmed sale — observed 2026-10-11T05:27:13.957Z, confidence 85%
- Inventory count — observed 2026-10-12T23:26:12.248Z, confidence 70%
- Population census — observed 2026-10-16T23:14:08.481Z, confidence 60%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/steam-siege/professor-sycamore-114)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Axy11-114%3AEN%3AHOLO~NM)