Cornerstone Mask Ogerpon ex

What Cornerstone Mask Ogerpon ex looks like when you open the box

Across the 4 lists we counted, this deck runs 15 to 20 Pokémon, 27 to 35 Trainers and 10 to 18 Energy. Its attacks are paid for in Fighting.

On results pages and on stream you will see it written « cornerstone-mask-ogerpon-ex ». Every card named in that label turns up in the tables below, which is what makes it a fair name for the deck.

Look at the Energy: 10 to 18 out of 60, when half the 136 decks we track run 11 or fewer. This one carries more than most, and you feel it at the table — it wants to load up a big Pokémon and swing hard, even if that means drawing a spare Energy now and then.

Nothing here needs evolving — everything that attacks is a Basic Pokémon. Put it down, charge it, swing. That is as fast as the game gets, and it makes those turns where you draw nothing far less painful.

Look at the Trainers: 27 to 35 cards out of 60, against a median of 31 across the 136 decks we track. Inside that, 9 to 12 Supporters, and the rule there is strict — one a turn, even if you are holding three. The 10 to 15 Items you can play all of in the same turn. It also brings up to 7 Stadiums, and 2 of the 136 decks we track bring that many or more. Only one Stadium sits on the table at a time: the one you play sends the one already there to the discard pile.

What Tools and Stadiums do — the two Trainer families we skipped here — and why the Energy count says so much: how to read a deck list.

What the card in this deck's name actually does

Cornerstone Mask Ogerpon ex gives this deck its name. Here is what is written on it.

Cornerstone Mask Ogerpon ex is in all 4 lists, 4 copies of it. Its Ability is called Cornerstone Stance, and here is what is printed on it, word for word: « Prevent all damage from attacks done to this Pokémon by your opponent's Pokémon that have an Ability. »

How Cornerstone Mask Ogerpon ex actually wins

Cornerstone Mask Ogerpon ex attacks with Demolish for 140. It needs 3 Energy, 1 Fighting and 2 Colorless attached, and it has 210 HP. And the number is not everything the card says. There is one more line printed under the attack, and it is the one everybody skips: "This attack's damage isn't affected by Weakness or Resistance, or by any effects on your opponent's Active Pokémon."

The cost of Demolish decides your first few turns. You only get to attach one Energy a turn, and that attack asks for 3. On your own attachments alone, your first real swing lands on turn 3. Except you are not on your own. Crispin, a single copy in the list, looks at the top of your deck and attaches the Energy it finds there. One copy in the whole list, so do not build your turn around it. When it shows up it buys you a turn, and that is already a lot.

Good news on mobility: pulling Cornerstone Mask Ogerpon ex back to the Bench costs you 1 Energy attached to it, and that is all. Retreating does not cost you your turn, so you step back and swing anyway. That matters enormously the day your opponent lands something nasty on it.

Cornerstone Mask Ogerpon ex carries the "ex" suffix, and your opponent takes 2 Prize cards instead of one when Cornerstone Mask Ogerpon ex falls. They need 6 to win: 3 well-placed knockouts on that card beat you, where it would take 6 anywhere else on your Bench.

The attackers in the deck's core, with their best attack, its cost and their Weakness

Pokémon	HP	Attack	Damage	Cost	Weakness	Retreat
Close Cornerstone Mask Ogerpon exBasic	210	Demolish	140		Grass ×2	1

The core: the 6 cards every list runs

These 6 cards appear in all 4 lists, without a single exception. That is 22 of the 60 slots. The other 38 are decided player by player.

Look at how those 22 slots break down: 7 Trainers, 4 Pokémon, 11 Energy. Nothing stands out in that split. What sets this deck apart is how thick its core is: 22 of the 60 slots are the same for everybody, when half the 136 decks we track fix 23 or more. This one leaves more room than most, and two players can build it very differently.

6 of those 6 cards do not sit at the same count from list to list: Cornerstone Mask Ogerpon ex (3 to 4), Boss's Orders (3 to 4) and Buddy-Buddy Poffin (1 to 3), plus 3 more. Add those spreads up and you get 12 copies the 4 lists do not agree on, inside the core itself.

What "3 to 4" means in the copies column, what the "TWM 130" code under each name is for, and why we count dozens of lists instead of one: how to read a deck list.

The cards present in every list counted, with the number of copies

Copies	Card	Printing	Kind	Rotation
3–4	Close Cornerstone Mask Ogerpon ex	TWM 112	Pokémon	leaves
3–4	Close Boss's Orders	MEG 114	Trainer	stays
1–3	Close Buddy-Buddy Poffin	TEF 144	Trainer	leaves
1–4	Close Crispin	SCR 133	Trainer	leaves
4–8	Grass Energy	MEE 1	Energy	stays
2–3	Fighting Energy	MEE 6	Energy	stays

The 49 cards that change from list to list

49 cards fight over the 38 slots that are left: 11 above three lists in four, 27 below one in four, and the percentage on each row says how many players took it.

The most agreed on first: Ariados at 75 %, Spinarak at 75 % and Budew at 75 %, plus 8 more above 75 %. Add those to the core and you have the common build.

The dividing line runs through Bastiodon, at 50 %: 2 of 4 players took it, 2 put something else there. The ones who run it bring 2 copies. Right at the bottom of the table, Jynx (1 list out of 4) and Rhyhorn (1 list out of 4).

Why a card at 45 % is not a bad card, and what order to buy all this in: how to read a deck list.

The cards some lists run and others don't, most common first

Lists running it	Card	Copies	Printing	Kind
75 %3/4	Close Ariados	1–4	TWM 5	Pokémon
75 %3/4	Close Spinarak	4	POR 1	Pokémon
75 %3/4	Close Budew	1–2	ASC 16	Pokémon
75 %3/4	Close Pokégear 3.0	2–3	SVI 186	Trainer
75 %3/4	Close Air Balloon	1–2	ASC 181	Trainer
75 %3/4	Close Battle Cage	2–3	PFL 85	Trainer
75 %3/4	Close Jamming Tower	1	TWM 153	Trainer
75 %3/4	Close Lisia's Appeal	1–2	SSP 179	Trainer
75 %3/4	Close Neutralization Zone	1	SFA 60	Trainer
75 %3/4	Close Switch	1–2	MEG 130	Trainer
75 %3/4	Close Xerosic's Machinations	1	SFA 64	Trainer
50 %2/4	Close Bastiodon	2	PBL 62	Pokémon
50 %2/4	Close Shieldon	2	PBL 61	Pokémon
50 %2/4	Close Rare Candy	2–3	MEG 125	Trainer
50 %2/4	Close Ultra Ball	3	MEG 131	Trainer
50 %2/4	Close Accompanying Flute	2	TWM 142	Trainer
50 %2/4	Close Antique Armor Fossil	2	PBL 72	Trainer
50 %2/4	Close Colress's Tenacity	2	SFA 57	Trainer
50 %2/4	Close Eri	2	TEF 146	Trainer
50 %2/4	Close Handheld Fan	1	TWM 150	Trainer
50 %2/4	Close Night Stretcher	1	ASC 196	Trainer
50 %2/4	Close Team Rocket's Watchtower	1	DRI 180	Trainer
25 %1/4	Close Jynx	4	PBL 32	Pokémon
25 %1/4	Close Rhyhorn	3	SCR 74	Pokémon
25 %1/4	Close Rhyperior	3	SCR 76	Pokémon
25 %1/4	Close Latias ex	2	SSP 76	Pokémon
25 %1/4	Close Meowth ex	2	POR 62	Pokémon
25 %1/4	Close Munkidori	2	TWM 95	Pokémon
25 %1/4	Close Teal Mask Ogerpon ex	2	TWM 25	Pokémon
25 %1/4	Close Chikorita	1	ASC 8	Pokémon
25 %1/4	Close Meganium	1	MEG 10	Pokémon
25 %1/4	Close Rhydon	1	SCR 75	Pokémon
25 %1/4	Close Wellspring Mask Ogerpon ex	1	TWM 64	Pokémon
25 %1/4	Close Lively Stadium	4	SSP 180	Trainer
25 %1/4	Close Dusk Ball	3	SSP 175	Trainer
25 %1/4	Close Energy Retrieval	3	SVI 171	Trainer
25 %1/4	Close Forest of Vitality	2	MEG 117	Trainer
25 %1/4	Close Poké Pad	2	POR 81	Trainer
25 %1/4	Close Crushing Hammer	1	POR 71	Trainer
25 %1/4	Close Energy Recycler	1	DRI 164	Trainer
25 %1/4	Close Lillie's Determination	1	MEG 119	Trainer
25 %1/4	Close Precious Trolley	1	SSP 185	Trainer
25 %1/4	Close Sacred Ash	1	DRI 168	Trainer
25 %1/4	Close Team Rocket's Petrel	1	DRI 176	Trainer
25 %1/4	Close Prism Energy	4	ASC 216	Energy
25 %1/4	Psychic Energy	4	MEE 5	Energy
25 %1/4	Close Rocky Fighting Energy	3	POR 87	Energy
25 %1/4	Water Energy	3	MEE 11	Energy
25 %1/4	Close Growing Grass Energy	2	POR 86	Energy

How many different cards Cornerstone Mask Ogerpon ex needs, and how long it will last

You need 55 different cards to cover every version of this deck, 6 of which nobody argues about. The rest is where lists differ from one another, and that is where you have room to choose.

All 4 lists bring an ACE SPEC, and that is where they part ways: 3 took Neutralization Zone and 1 took Precious Trolley. You are allowed ONE ACE SPEC card in your whole deck, so a single copy covers it whatever it costs. New to this deck? Take Neutralization Zone and watch what the others do with theirs before you switch.

Then there is time. 3 of the 6 core cards carry the letter H, the one that goes at the next rotation: Cornerstone Mask Ogerpon ex, Buddy-Buddy Poffin and Crispin. The core table marks every one of them. In copies, that is 7 of the 22 slots the core fills. Which day it lands, we do not know yet.

What Cornerstone Mask Ogerpon ex struggles against

The attackers in this deck are Weak to Grass, so they take DOUBLE damage from that type. 21 of the 136 decks we track attack in exactly that type.

Concretely, here is what is waiting for you: Teal Mask Ogerpon ex / Meganium / Hydrapple ex, Crustle and Festival Lead (Thwackey), plus 18 more decks. The table below takes them one at a time, and those are the lists you practise against first before an event.

This table counts one thing, Weakness, and that comes to 21 decks out of the 136 we track. The other 115 do not attack into yours, and this table says nothing about them. You will still run into them.

Going the other way, your attackers are Fighting, and 42 of the decks we track have an attacker Weak to one of those: Dragapult ex, Latias ex / Mega Kangaskhan ex and Alakazam / Dudunsparce, among others. That is you doubling, for once. Second half of the table.