# Cornerstone Mask Ogerpon ex #215/167 — Twilight Masquerade

## Summary

Cornerstone Mask Ogerpon ex is the Fighting form of Paldea's breakout mascot, and its ability to shrug off damage from ability-using attackers gave it real tournament relevance. As a special illustration rare by Yano Keiji, it sits in the set's chase tier, where fan loyalty and scarcity meet. At an $11 modelled guide, up 15% over 30 days on 91 copies traded, with 33 days of inventory on the board, this printing is almost entirely collector premium, since the same card plays for $0.61 out of Prismatic Evolutions; a CGC 10 brings $47, 4.3 times raw, but a 55% gem rate against $45 of fees makes grading a losing trade.

## Identity

| Field | Value |
| --- | --- |
| Set | Twilight Masquerade |
| Number | 215/167 |
| Rarity | Special illustration rare |
| Era | SV |
| Illustrator | Yano Keiji |
| Release date | 2024-05-24 |
| Image | Unavailable |

## Card details

| Field | Value |
| --- | --- |
| Card type | POKEMON |
| Stage | Basic |
| Suffix | ex |
| HP | 210 |
| Types | Fighting |
| Ability: Cornerstone Stance | Prevent all damage from attacks done to this Pokémon by your opponent's Pokémon that have an Ability. |
| Attack: Demolish | cost Fighting/Colorless/Colorless — damage 140 — This attack's damage isn't affected by Weakness or Resistance, or by any effects on your opponent's Active Pokémon. |
| Weakness | Grass ×2 |
| Retreat | 1 |
| Regulation mark | H |
| Legal | Standard yes · Expanded yes |
| Pokédex entry | [Ogerpon #1017](https://cardboardalpha.com/pokemon/pokedex/ogerpon) |
| Finishes | Holo |
| Languages | EN |

## Current stats

- Headline price: **$10.96** (ITEM_MEDIAN; modelled guide price) — as of 2026-10-16T21:41:43.326Z
- 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: -1.30% — as of 2026-10-16T21:41:43.326Z
- Floor delivered ask: $10.25 — as of 2026-10-16T21:41:43.326Z
- Quant score: 53/100, regime FALLING — as of 2026-10-16T21:41:43.326Z — 9 of 11 inputs · 90% weight · -5% confidence

## Provenance

- Catalog — observed 2024-05-24T00:00:00Z, confidence 98%
- Live ask — observed 2026-10-17T02:54:12.673Z, confidence 90%
- Guide price (modelled) — observed 2026-10-16T00:00:00.000Z, confidence 90%
- Price statistic — observed 2026-10-13T05:15:00.114Z, confidence 90%
- Confirmed sale — observed 2026-10-12T23:26:11.900Z, confidence 85%
- Inventory count — observed 2026-10-13T05:15:00.113Z, confidence 70%
- Population census — observed 2026-10-14T17:46:45.078Z, confidence 60%

## Links

- [View on Cardboard Alpha](https://cardboardalpha.com/pokemon/twilight-masquerade/cornerstone-mask-ogerpon-ex-215)
- [JSON snapshot](https://cardboardalpha.com/api/terminal/raw~tcgdex%3Asv06-215%3AEN%3AHOLO~NM)