This is a guide to movesets and best builds for using Ogerpon Cornerstone Mask in Regulation D Ranked Battle in Pokemon Scarlet and Violet (SV). Read on for tips on the best Nature, EV spreads, Movesets, Tera Type, and Held Items to use with Ogerpon Cornerstone Mask, as well as its strengths and weakness.

Ogerpon - Related Guides
Evolution and Learnset	Moveset for Ranked Battle	Tera Raid Build

Ogerpon Builds
Teal Mask	Hearthflame Mask	Wellspring Mask	Cornerstone Mask

Cornerstone Mask Ogerpon (Rock) Base Stats, Type, Ability and Weakness

Kitakami #200.3		Type
Ogerpon (Cornerstone Mask)
		Abilities
		Sturdy Embody Aspect
Weak to:
	(2x)
Damaged Normally By:	(1x)
Resists:	(0.5x)

What is Type Effectiveness?

Base Stats

Best Nature for Cornerstone Mask Ogerpon (Rock)

What are Natures?

1.2x Damage Boost to All Damaging Moves in Masked Forms

When Ogrepon has a Mask Held Item (Wellspring Mask, Hearthflame Mash, or Cornerstone Mask, not the Teal Mask base form), it receives an additional 20% damage boost on all moves, regardless of whether they are STAB or not.

This bonus also applies even if Ogrepon is not Terastallized. This amounts to a total of a 1.7x damage boost when accounting for STAB + Mask Boost. If Terastallized and using a move which matches the Tera Type, this reaches up to a 2.2x Damage boost!

Singles Movesets for Cornerstone Mask Ogerpon (Rock)

Cornerstone Mask Ogerpon (Rock) Moveset & Best Build

Nature	Adamant (+Atk, -Sp. Atk)
EV Spread	252 Atk / 4 Def / 252 Spe
Final Stat Values	155 HP / 189 Atk / 105 Def / 72 Sp. Atk / 116 Sp. Def / 162 Spe
Ability	Sturdy
Tera Type
Held Item	Cornerstone Mask
Moveset	・ Ivy Cudgel ・ Horn Leech ・ Knock Off ・ Quick Attack

Summary

Doesn't need to Terastallize to perform well. Only Ogerpon form that can easily deal with Dragonite. Cannot be OHKO thanks to Sturdy.

Ability and Held Item

Ability	Held Item
Sturdy	Cornerstone Mask

Ogerpon's Ability when it is in its Cornerstone Mask form is Sturdy, which grants it a built in Focus Sash, protecting Ogerpon from getting OHKOd by attacks if it is at full HP. Ogerpon also uniquely has Embody Aspect, an additional ability that triggers upon Terastallization, that gives Ogerpon a stat boost based on what Mask it is wearing.

In this form, Ogerpon will get a Defense boost upon Terastallization.

The chosen Held Item for this build is the Cornerstone Mask, which will change Ogerpon's type to Rock / Grass when held.

Moves Breakdown

Ivy Cudgel, or 'Rock Cudgel' as it is sometimes called in the community, is a powerful STAB move with 100 Base Power. It will be a Rock-type Attack in this build.

Horn Leech is a Grass-type STAB move that heals Ogerpon for half of the damage it deals. It also synergizes well with this form since it will reset Sturdy if Ogerpon is healed back to full.

Knock Off is a strong utility move that can also be disruptive because of its ability to remove an opposing Pokemon's valuable Held Item.

Quick Attack is a +1 priority move that can guarantee a knock out before the opponent uses its own move.

Best Tera Type: Rock

Rock Tera Type Matchup
Weak to:
	(2x)
Damaged Normally By:	(1x)
Resists:	(0.5x)

Rock is the best Tera Type for this build because Ogerpon can shed its weaknesses from its Grass typing, while boosting the power of Ivy Cudgel. It is also the only Tera Type available when it is holding the Cornerstone Mask.

Best Rock Type Pokemon for Ranked Battle

EV Spread and Nature

Full Attack and Speed EV investment, as well as an Adamant Nature ensures that Ogerpon hits as hard and as fast as possible with its moves, while the remaining 4 EVs are placed in Def to slightly boost its bulk.

Other Viable Moves

Key Damage Calculations

Damage Dealt by Ogerpon
166 HP｜116 Def Defensive EV Investment: 4 Def Item: Choice Band Ability: Inner Focus	Rock Ivy Cudgel 222 ~ 264 (133.7 ~ 159%) Guaranteed OHKO
166 HP｜116 Def Defensive EV Investment: 4 Def Item: Choice Band Ability: Multiscale	Rock Ivy Cudgel 111 ~ 132 (66.8 ~ 79.5%) Guaranteed 2HKO
175 HP｜120 Def Defensive EV Investment: 4 Sp. Def Item: Safety Goggles	Horn Leech 162 ~ 192 (92.5 ~ 109.7%) 52.2 ~ 56.7% HP Healed 50% Chance to OHKO

Game8's Competitive Damage Calculator

Doubles Movesets for Cornerstone Mask Ogerpon (Rock)

Cornerstone Mask Ogerpon (Rock) Moveset & Best Build

Nature	Jolly (+Spe, -Sp. Atk)
EV Spread	4 HP / 252 Atk / 252 Spe
Final Stat Values	156 HP / 172 Atk / 104 Def / 116 Sp. Def / 178 Spe
Ability	Sturdy
Tera Type
Held Item	Cornerstone Mask
Moveset	・ Wood Hammer ・ Ivy Cudgel ・ Encore ・ Spiky Shield

Summary

Uniquely has Embody Aspect, an additional Ability that gives it a Defense boost when it Terastallizes. Has access to Encore. Signature Move, Ivy Cudgel is very powerful, and can change its type depending on Ogerpon's Form. In this case, it becomes a Rock-type Move.

Ability and Held Item

Ability	Held Item
Sturdy	Cornerstone Mask

Ogerpon's Ability when it is in its Cornerstone Mask form is Sturdy, which grants it a built in Focus Sash, protecting Ogerpon from getting OHKOd by attacks if it is at full HP. Ogerpon also uniquely has Embody Aspect, an additional ability that triggers upon Terastallization, that gives Ogerpon a stat boost based on what Mask it is wearing.

In this form, Ogerpon will get a Defense boost upon Terastallization.

The chosen Held Item for this build is the Cornerstone Mask, which will change Ogerpon's type to Rock / Grass when held.

Moves Breakdown

Wood Hammer is a strong STAB move that comes at the cost of some of Ogerpon's HP

Ivy Cudgel, or 'Rock Cudgel' as it is sometimes called in the community, is a powerful coverage option with 100 Base Power. It will be a Rock-type Attack in this build.

Encore can punish defensive plays by locking opponents into a move which they will be forced to use repeatedly. This is best used after turns where an opponent used Protect or Fake Out, or any Status move.

Spiky Shield can protect Ogerpon and deal a small amount of damage to the opponent upon contact.

Best Tera Type: Rock

Rock Tera Type Matchup
Weak to:
	(2x)
Damaged Normally By:	(1x)
Resists:	(0.5x)

Rock is the best Tera Type for this build because Ogerpon can shed its weaknesses from its Grass typing, while boosting the power of Ivy Cudgel. It is also the only Tera Type available when it is holding the Cornerstone Mask.

Best Rock Type Pokemon for Ranked Battle

EV Spread and Nature

Full Attack and Speed EV investment, as well as a Jolly Nature ensures that Ogerpon hits as hard and as fast as possible with its moves, while the remaining 4 EVs are placed in HP to slightly boost its bulk.

Other Viable Moves

Key Damage Calculations

Damage Dealt by Ogerpon
55 HP｜55 Def Defensive EV Investment: 4 Sp. Def Item: Booster Energy	Wood Hammer 129 ~ 153 (99.2 ~ 117.6%) 93.8% Chance to OHKO
100 HP｜100 Def Defensive EV Investment: 4 Sp. Def Item: Safety Goggles	Wood Hammer 194 ~ 230 (110.2 ~ 130.6%) Guaranteed OHKO
55 HP｜80 Def Defensive EV Investment: 4 Sp. Def Item: Life Orb	Water Ivy Cudgel 194 ~ 230 (148 ~ 175.5%) Guaranteed OHKO

Game8's Competitive Damage Calculator

How to Use Cornerstone Mask Ogerpon (Rock) Effectively

Use Combination of Sturdy and Horn Leech

Sturdy prevents Ogerpon from getting knocked out while at full HP, while Horn Leech heals it for half of the damage dealt. Whenever you aren't at full HP, you Horn Leech to try and restore your HP back to full so that Sturdy is active again.

Embody Aspect's Stat Buff

Utilize the Defense boost Ogerpon gets from Embody Aspect while Terastallized to resist hits from moves like Extreme Speed on Dragonite and Arcanine or Facade from Ursaluna.

How to Build a Team with Cornerstone Mask Ogerpon (Rock)

Ogerpon's Cornerstone Mask form has the least amount of resistances out of all the forms, but is a great switch in into many strong Pokemon and moves in the meta game.

Sample Singles Teams

Sturdy Lead	Physical Attacker	Special Attacker
Ogerpon (Cornerstone Mask)	Urshifu Rapid-Strike Style	Heatran

Since Ogerpon's Cornerstone Mask form is best used as a defensive Pokemon, it is best paired with other Pokemon that can complete the defensive typing core of Water, Grass, and Fire.

Between Urshifu Rapid Strike, Ogerpon, and Heatran, these three are able to resist most of the damage types in the game.

Sample Doubles Teams

Trick Room / Special Attacker	Follow Me / Physical Attacker
Cresselia	Ogerpon (Cornerstone Mask)
Physical Attacker	Special Attacker
Iron Hands	Enamorus (Therian Forme)

With access to Sturdy and Follow Me, Cornerstone Mask Ogerpon makes for a great support Pokemon to enable Trick Room teams. Ogerpon can also threaten knock outs on opposing Pokemon like Tornadus or Chi-Yu while still providing Follow Me support for other Pokemon in the back.

Counters for Cornerstone Mask Ogerpon (Rock)

Use Priority Moves

While Ogerpon is decently fast, Priority and faster Pokemon can handily deal with it.

The best users of Priority are the combo of Chien-Pao and Dragonite, who both can threaten Ogerpon with their offensive options.

List of Priority Moves

Best Pokemon to Use

Pokemon	Description
Chien-Pao	Ranking: ★★★★★ ・Chien-Pao is able to threaten 2/4 of the Ogerpon forms with its access to powerful Ice STAB Attacks and Sword of Ruin Ability. ▶️Chien-Pao Best Movesets
Dragonite	Ranking: ★★★★ ・Chien-Pao's usual partner, Dragonite resists most Ivy Cudgel types, and can hit back with powerful Extreme Speeds and Flying Tera Blasts ・Is especially effective next to Chien-Pao with its Sword of Ruin Ability. ▶️Dragonite Best Movesets

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