Mega Gengar ex deck: the core, the flex slots, and what beats it

What Mega Gengar ex looks like when you open the box

Across the 7 lists we counted, this deck runs 13 to 23 Pokémon, 26 to 37 Trainers and 8 to 12 Energy. Its attacks are paid for in Darkness.

On results pages and on stream you will see it written « mega-gengar-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: 8 to 12 out of 60, exactly the median of the 91 decks we track. It draws neither too much nor too little, so this is not where its games are won or lost.

It takes a while to set up. Mega Gengar ex is a Stage 2 Pokémon: you put down the baby, you evolve it, and then you evolve it again. Three cards stacked before anything attacks. That is what the hardest-hitting decks cost you, and it is also where they crack — a fast opponent can bury you before the line is standing.

On the Trainer side: 11 to 15 Supporters, 10 to 17 Items, 2 to 4 Tools and 0 to 2 Stadiums, out of 26 to 37 — the median across the 91 decks we track being 31. Items edge it without crushing the Supporters.

What those four families of Trainer actually do, and why the Energy count says so much: how to read a deck list.

What the card in this deck's name actually does

Mega Gengar ex gives this deck its name. Here is what is written on it.

Mega Gengar ex is in all 7 lists, 3 copies of it. Its Ability is called Shadowy Concealment, and here is what is printed on it, word for word: « If 1 of your {D} Pokémon is Knocked Out by damage from an attack from your opponent's Pokémon ex, that player takes 1 fewer Prize card. The effect of Shadowy Concealment doesn't stack. »

How Mega Gengar ex actually wins

Mega Gengar ex attacks with Void Gale for 230, and it costs 2 Energy (Darkness and Darkness), with 350 HP to absorb the answer. The whole list exists to get it online fast.

Do the arithmetic, it decides your first few turns. One Energy attached a turn, 2 to pay for Void Gale: with no help you swing on turn 2, and every card that accelerates Energy buys one of those turns back.

Here is the detail that quietly loses games: Mega Gengar ex has a Retreat Cost of 2, which is a whole turn to get it back to the Bench.

Mega Gengar ex, Pecharunt ex and Fezandipiti ex carry the "ex" suffix, and your opponent takes TWO Prize cards instead of one when one of them falls. They need six to win: three well-placed knockouts on those cards beat you, where it would take six 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
Mega Gengar exStage 2	350	Void Gale	230	Darkness + Darkness	Fighting ×2	2
Pecharunt exBasic	190	Irritated Outburst	60×	Darkness + Darkness	Fighting ×2	1

The core: the 8 cards every list runs

These 8 cards appear in all 7 lists, without a single exception. That is 30 of the 60 slots. The other 30 are decided player by player.

Look at how those 30 slots break down: 12 Trainers, 6 Pokémon, 12 Energy. The balance is a normal one, so it is the cards themselves, more than the split, that give this deck its character.

7 of those 8 cards do not sit at the same count from list to list: Mega Gengar ex (2 to 3), Pecharunt ex (1 to 2) and Lillie's Determination (2 to 4), plus 4 more. Everybody runs them, the last copy is arguable.

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
2–3	Mega Gengar ex	PFL 56	Pokémon	stays
1–2	Pecharunt ex	SFA 39	Pokémon	leaves
1	Fezandipiti ex	ASC 142	Pokémon	leaves
2–4	Lillie's Determination	MEG 119	Trainer	stays
1–4	Rare Candy	MEG 125	Trainer	stays
2–3	Boss's Orders	MEG 114	Trainer	stays
2–3	Buddy-Buddy Poffin	TEF 144	Trainer	leaves
7–12	Darkness Energy	MEE 7	Energy	stays

The 64 cards that change from list to list

64 cards fight over the 30 slots that are left: 1 above three lists in four, 33 below one in four, and the percentage on each row says how many players took it.

The most agreed on first: Ultra Ball at 86 %. Add those to the core and you have the common build.

The dividing line runs through Gastly, at 57 %: 4 of 7 players took it, 3 put something else there. Read its text before you decide. Right at the bottom, Dunsparce at 14 % and Dudunsparce at 14 %: personal ideas, only worth copying if you know why.

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
86 %6/7	Ultra Ball	1–4	MEG 131	Trainer
57 %4/7	Gastly	4	TEF 102	Pokémon
57 %4/7	Scraggy	2	WHT 57	Pokémon
57 %4/7	Janine's Secret Art	1–3	PRE 112	Trainer
57 %4/7	Night Stretcher	2–3	ASC 196	Trainer
57 %4/7	Risky Ruins	1	MEG 127	Trainer
43 %3/7	Haunter	1–3	PFL 55	Pokémon
43 %3/7	Gastly	2–3	POR 48	Pokémon
43 %3/7	Okidogi ex	2	SFA 36	Pokémon
43 %3/7	Scrafty	2	WHT 58	Pokémon
43 %3/7	Absol	1	SFA 30	Pokémon
43 %3/7	Crobat	1–2	CRI 51	Pokémon
43 %3/7	Gengar ex	1	TEF 104	Pokémon
43 %3/7	Haunter	1	TEF 103	Pokémon
43 %3/7	Zubat	1–2	SFA 27	Pokémon
43 %3/7	Cyrano	4	SSP 170	Trainer
43 %3/7	Poké Pad	2–4	POR 81	Trainer
43 %3/7	Dark Bell	2	PBL 75	Trainer
43 %3/7	Energy Retrieval	2	SVI 171	Trainer
43 %3/7	Hero's Cape	1	TEF 152	Trainer
43 %3/7	Judge	1	POR 76	Trainer
29 %2/7	Chi-Yu	2–3	PBL 59	Pokémon
29 %2/7	Toxel	2–3	PFL 67	Pokémon
29 %2/7	Toxtricity	2	PFL 68	Pokémon
29 %2/7	Team Rocket's Petrel	3–4	DRI 176	Trainer
29 %2/7	Punk Helmet	2–3	PFL 92	Trainer
29 %2/7	Binding Mochi	2	PRE 95	Trainer
29 %2/7	Dawn	2	PFL 87	Trainer
29 %2/7	Powerglass	2	SFA 63	Trainer
29 %2/7	Energy Recycler	1	DRI 164	Trainer
29 %2/7	Hilda	1	WHT 84	Trainer
14 %1/7	Dunsparce	3	JTG 120	Pokémon
14 %1/7	Dudunsparce	2	TEF 129	Pokémon
14 %1/7	Gengar	2	POR 50	Pokémon
14 %1/7	Haunter	2	POR 49	Pokémon
14 %1/7	Mega Scrafty ex	2	ASC 135	Pokémon
14 %1/7	N's Zoroark ex	2	JTG 98	Pokémon
14 %1/7	N's Zorua	2	JTG 97	Pokémon
14 %1/7	Pecharunt	2	SVP 149	Pokémon
14 %1/7	Mega Darkrai ex	1	PBL 48	Pokémon
14 %1/7	Morpeko ex	1	PBL 55	Pokémon
14 %1/7	Munkidori	1	TWM 95	Pokémon
14 %1/7	N's Reshiram	1	JTG 116	Pokémon
14 %1/7	Crispin	3	SCR 133	Trainer
14 %1/7	N's PP Up	3	JTG 153	Trainer
14 %1/7	Switch	3	MEG 130	Trainer
14 %1/7	Wally's Compassion	3	MEG 132	Trainer
14 %1/7	Air Balloon	2	ASC 181	Trainer
14 %1/7	Battle Cage	2	PFL 85	Trainer
14 %1/7	Brock's Scouting	2	JTG 146	Trainer
14 %1/7	Energy Switch	2	MEG 115	Trainer
14 %1/7	Grimsley's Move	2	PFL 90	Trainer
14 %1/7	Pokémon Center Lady	2	MEG 123	Trainer
14 %1/7	Team Rocket's Factory	2	DRI 173	Trainer
14 %1/7	Black Belt's Training	1	JTG 143	Trainer
14 %1/7	Lana's Aid	1	TWM 155	Trainer
14 %1/7	Lucky Helmet	1	TWM 158	Trainer
14 %1/7	Maximum Belt	1	TEF 154	Trainer
14 %1/7	Mega Signal	1	MEG 121	Trainer
14 %1/7	Secret Box	1	TWM 163	Trainer
14 %1/7	Special Red Card	1	CRI 82	Trainer
14 %1/7	Unfair Stamp	1	TWM 165	Trainer
14 %1/7	Shadowy Darkness Energy	2	PBL 83	Energy
14 %1/7	Legacy Energy	1	TWM 167	Energy

What Mega Gengar ex costs to build, and how long it will last

You need 72 different cards to cover every version of this deck, 8 of which nobody argues about. We do not have card prices, so we are not going to put a number on it.

Where the money goes, though, we can name: it is Mega Gengar ex, Pecharunt ex and Fezandipiti ex, by a distance. The 12 Trainer slots in the core cost next to nothing, and you probably own some already. All 7 lists bring an ACE SPEC, and that is where they part ways: 3 took Hero's Cape, 1 took Legacy Energy and 1 took Maximum Belt. The flex table shows you all 5. 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 Hero's Cape and watch what the others do with theirs before you switch.

Then there is time. 3 of the 8 core cards carry the letter H, the one that goes at the next rotation: Pecharunt ex, Fezandipiti ex and Buddy-Buddy Poffin. The core table marks each of them. The date belongs to the publisher, and we do not have it.

What Mega Gengar ex struggles against

The attackers in this deck are Weak to Fighting, so they take DOUBLE damage from that type. 12 of the 91 decks we track attack in exactly that type.

Concretely, here is what is waiting for you: Mega Lucario ex, Mega Lucario ex / Hariyama and Cynthia's Garchomp ex, plus 9 more decks. The table below takes them one at a time, and those are the lists you practise against first before an event.

Do not stop at this table, though. This deck spends three cards getting Mega Gengar ex standing, and the deck that hurts you most this season may simply be the one that swings before your line is up, without ever touching your Weakness.

Going the other way, your attackers are Darkness, and 27 of the decks we track have an attacker Weak to one of those: Dragapult ex, Dragapult ex / Dusknoir and Slowking, among others. That is you doubling, for once. Second half of the table.

Questions people ask

What is the Mega Gengar ex deck list?

There isn't one, and that is the whole point. Across 7 tournament lists harvested on 16 August 2026, 8 cards turn up in every single one — 30 slots out of 60. The remaining 30 change from player to player, with 64 different cards competing for them. Both tables are above.

How many lists is this counted on, and where do they come from?

7 lists, played across 7 different tournaments, harvested on 16 August 2026 from play.limitlesstcg.com. All 7 were read card by card, and every card recognised.

Where do I start if I want to build Mega Gengar ex?

With the whole core: 8 cards, 30 slots. Inside it, buy the 12 Trainer slots and the 12 Energy first — they are cheap and they carry over into your next deck. Leave Mega Gengar ex, Pecharunt ex and Fezandipiti ex for last, because that is the bill. Only then work down the flex table and add the cards the most lists agree on, starting with Ultra Ball at 86 %.

What beats Mega Gengar ex?

Its attackers are Weak to Fighting, so they take double damage from an attacker of that type. 12 of the 91 decks we track play an attacker of that type: Mega Lucario ex, Mega Lucario ex / Hariyama, Cynthia's Garchomp ex and Ceruledge ex, among others.

Will Mega Gengar ex survive the next rotation?

Not intact: 3 core cards out of 8 carry the letter H, starting with Pecharunt ex, Fezandipiti ex and Buddy-Buddy Poffin.

Are a lot of people playing Mega Gengar ex?

We have read 7 lists of it, which puts it 89th of the 91 decks we track by lists read. The platform those tournaments run on counts 7 entries for it, 0.03 % of the field, across all its players. That figure is theirs.

These pages are about the same corner of the game. If you came away from this one still wondering about something, start with one of them.