Cornerstone Mask Ogerpon ex (sv6-199‑Holofoil) is a Basic Fighting-type Tera Pokémon ex from the Twilight Masquerade expansion. Its Cornerstone Stance ability prevents all damage from attacks done to it by opposing Pokémon that have an Ability. It also has Demolish, a 140-damage move whose damage is unaffected by Weakness, Resistance, or effects on the opponent's Active Pokémon, and as a Pokémon ex it awards two Prize cards if Knocked Out.

Identity & printing

Name: Cornerstone Mask Ogerpon ex (Holofoil)
Number: 199
Printed number: 199/167
Rarity: Ultra Rare
Variant: Holofoil
Language code: EN
Print ID: sv6-199-Holofoil

Type line & stats

Market prices (catalog API)

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Catalog pricing data as of 14 Apr 2026, 17:47

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Supertype: Pokémon
Subtypes: Basic, Tera, ex
Types: Fighting

Catalog metadata

National Pokédex: 1017
Imported from: Vendor Tools Public API catalog

Rules

As long as this Pokémon is on your Bench, prevent all damage done to this Pokémon by attacks (both yours and your opponent's). Pokémon ex rule: When your Pokémon ex is Knocked Out, your opponent takes 2 Prize cards. Tera: As long as this Pokémon is on your Bench, prevent all damage done to this Pokémon by attacks (both yours and your opponent's).

Set, artist & references

Artist: 5ban Graphics
Language: English
Set name: Twilight Masquerade
Game name: Pokémon

In play

Abilities, attacks, weakness & resistance

Abilities

Ability: Cornerstone Stance
Prevent all damage from attacks done to this Pokémon by your opponent's Pokémon that have an Ability.

Attacks

Demolish140
This attack's damage isn't affected by Weakness or Resistance, or by any effects on your opponent's Active Pokémon.

Weaknesses

Grass ×2

More in this set

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Description

Cornerstone Mask Ogerpon ex (sv6-199‑Holofoil) is a Basic Fighting-type Tera Pokémon ex from the Twilight Masquerade expansion. Its Cornerstone Stance ability prevents all damage from attacks done to it by opposing Pokémon that have an Ability. It also has Demolish, a 140-damage move whose damage is unaffected by Weakness, Resistance, or effects on the opponent's Active Pokémon, and as a Pokémon ex it awards two Prize cards if Knocked Out.

Catalog pricing data as of 14 Apr 2026, 17:47