Galarian Yamask counters

#0562

ground ghostTier 3

Lobby CP

8,243

3,600

Timer

3:00

Attack

Defense

113

Difficulty

0.42

Pokebattler scale

Beating Galarian Yamask should take 1 trainer with level 40 counters. Caught CP 516-561.

Weak toghost1.6xwater1.6xgrass1.6xice1.6xdark1.6x

Who to bring

IncludeMega Legendary Shadow

Improve your raidweather · friendship · Mega in the lobby · Party Power · Adventure EffectsShow ▾

Weather

★ boosts a type this boss is weak to

No boost Sunny or clear ★Rainy ★Partly cloudy Cloudy Windy Snow ★Fog ★

Friendship

every trainer in the lobby who is your friend

None Good friend (+3%)Great friend (+5%)Ultra friend (+7%)Best friend (+10%)

Mega in the lobby

a Mega boosts every trainer's attacks: 1.3x of its own type, 1.1x of others

Try a Water Mega — most top counters attack with Water

Party Power

Party Play: the charged move after a full meter does 2x

Off 2 trainers 3 trainers 4 trainers

Adventure Effects

only these three change a raid

Behemoth Blade (+10% attack)Behemoth Bash (+10% defense)Dynamic Punch+ (+15% attack vs Mega)

Of the game's eleven Adventure Effects only Behemoth Blade (Crowned Sword Zacian), Behemoth Bash (Crowned Shield Zamazenta) and Dynamic Punch+ (Mega Mewtwo X) change a raid; Roar of Time, Spacial Rend, Freeze Shock, Ice Burn, Sunsteel Strike, Moongeist Beam, Future Sight+ and Dynamax Cannon act outside raids. Dynamic Punch+ only counts against a Mega boss, so it changes nothing here. Sources: the full list, Behemoth Blade / Bash, Dynamic Punch+.

Best counters

Mega, Legendary, Shadow · level 40

The best Galarian Yamask counters are Mega Greninja, Necrozma (Dawn Wings), Shadow Darkrai, Kyurem (Black), Kyurem (White) & Shadow Kyogre.

Suggested party of sixat most one Mega

M. Greninja
Necrozma (Dawn Wings)
S. Darkrai
Kyurem (Black)
Kyurem (White)
S. Kyogre

9 more Megas ranked inside the top six — a party can hold only one Mega, so the best one stays and the next non-Mega takes the slot.

Ranked by Estimator (trainers needed); small print: time to winOrder byEstimatorOverall %

1Mega GreninjaMegapartyWater Shuriken / Surf+0.381:06
2Mega HoundoomMegaSnarl / Dark Pulse+0.411:11
3Primal KyogreMegaLegendaryWaterfall / Origin Pulse0.421:15
4Mega StarmieMegaWater Gun / Liquidation+0.431:15
5Mega GengarMegaLick / Shadow Ball0.441:17
6Necrozma (Dawn Wings)LegendarypartyShadow Claw / Moongeist Beam0.441:17
7Shadow DarkraiShadowLegendarypartySnarl / Foul Play0.451:19
8Mega ChesnaughtMegaVine Whip / Seed Bomb+0.451:19
9Kyurem (Black)LegendarypartyShadow Claw / Freeze Shock0.461:20
10Mega AbsolMegaSnarl / Brutal Swing0.461:20
11Kyurem (White)LegendarypartyIce Fang / Ice Burn0.461:21
15Shadow KyogreShadowLegendarypartyWaterfall / Origin Pulse0.481:24

More orders under All settings (Sort by). The top 15 in detail.

Build and order a party of six →Plan your raid lobby →

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The Pokebox saved in this browser · each at its own level, IVs and moves.

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Raid tier — Group Raid

Super Mega Legendary Super Mega Primal Mega Legendary Mega Elite Shadow Tier 5 Tier 5 Shadow Tier 3 Tier 3 Shadow Tier 1 Tier 1 Tier 4 Tier 2

Related countersShadow Galarian Yamask Yamask

Raid alerts…

Top 15 Galarian Yamask counters in detail

Click a row for damage per move, breakpoints and the energy cycle. Click a column to sort. All 30 ranked attackers, with every column, are under All settings.

Trainers1soloable

#	Attacker	Moveset
1	Mega Greninjawaterdarkjoint top pick	waterWater ShurikenwaterSurf+	3,784	1:06	0.38	0.3	356.1%
2	Mega Houndoomdarkfire	darkSnarldarkDark Pulse+	3,842	1:11	0.41	0.5	329.8%
3	Primal Kyogrewater	waterWaterfallwaterOrigin Pulse	5,902	1:15	0.42	0.0	315.0%
4	Mega Starmiewaterpsychic	waterWater GunwaterLiquidation+	3,701	1:15	0.43	1.0	313.6%
5	Mega Gengarghostpoison	ghostLickghostShadow Ball	4,336	1:17	0.44	1.4	305.6%
6	Necrozma (Dawn Wings)psychicghost	ghostShadow ClawghostMoongeist Beam	4,099	1:17	0.44	1.3	305.5%
7	Shadow Darkraidark	darkSnarldarkFoul Play	3,739	1:19	0.45	0.7	296.7%
8	Mega Chesnaughtgrassfighting	grassVine WhipgrassSeed Bomb+	4,093	1:19	0.45	0.0	295.3%
9	Kyurem (Black)dragonice	ghostShadow ClawiceFreeze Shock	4,605	1:20	0.46	0.9	293.7%
10	Mega Absoldark	darkSnarldarkBrutal Swing	3,301	1:20	0.46	1.0	293.4%
11	Kyurem (White)dragonice	iceIce FangiceIce Burn	4,605	1:21	0.46	0.9	291.2%
12	Mega Sceptilegrassdragon	grassBullet SeedgrassFrenzy Plant	4,056	1:21	0.46	1.0	291.0%
13	Mega Mewtwo Ypsychic	psychicPsycho CutpsychicFuture Sight+	6,428	1:21	0.46	0.5	290.3%
14	Mega Mewtwo Xpsychicfighting	psychicPsycho CutghostShadow Ball	6,112	1:22	0.47	0.5	287.2%
15	Shadow Kyogrewater	waterWaterfallwaterOrigin Pulse	4,115	1:24	0.48	1.0	279.6%

Ordered by Estimator alone, fewest trainers needed first. . The place badge names each row's Overall place on hover.

Times are one trainer with six copies of that attacker, level 40 at 15/15/15, no weather, no friendship, no dodging, Shadow / Mega / Legendary attackers hidden — the same defaults pokebattler.com's own counter pages open with. Open the full counter tool to change any of them. "Details" opens the per-move damage, breakpoints and energy cycle against Galarian Yamask.

Estimator is how many trainers of this strength the fight needs. Power is the share of Galarian Yamask's HP that six of that attacker remove inside one raid timer, so over 100% means they finish it with time to spare. Faints is how many of the six go down inside that timer.

Hardest movesets to raid against

The same boss is a different fight depending on what it knows. Each row re-simulates the top 6 counters above against one specific moveset; the list is ordered hardest first, and clicking a row filters the whole page to that moveset — the ranking, the estimator and the share link all follow.

Boss moveset	Win % (1)	Overall	Power	Time to win	Faints	Estimator
Random (any moveset)showing	100%	302%	302.8%	1:18	0.8	0.44
Astonish / Rock Tomb	100%	303%	301.7%	1:18	0.8	0.44
Astonish / Night Shade	100%	311%	302.5%	1:18	0.8	0.44

Measured over the top 6 attackers on the list above rather than by re-ranking the whole roster once per moveset — the ordering is what the table is for, and a full re-rank per moveset would cost ten times the page's whole simulation budget. Win % is the share of runs 1 trainers of those attackers finish inside the raid timer. Overall is Pokebattler's published blend on its own absolute scale (higher is easier), not a percentage of the best row the way the ranked table's Overall column is — which is why an easy boss reads well above 100% here.

Simulating each boss moveset…

Galarian Yamask weaknesses and resistances

Every one of the 18 attacking types against this boss's typing. GO multipliers: 1.6x super effective, 2.56x doubly, 0.625x resisted, 0.39x doubly resisted.

ghost1.6x water1.6x grass1.6x ice1.6x dark1.6x flying1x ground1x steel1x fire1x psychic1x dragon1x fairy1x rock0.63x bug0.63x normal0.39x fighting0.39x poison0.39x electric0.39x

Weak (5)
Neutral (7)
Resists (6)

It resists normal0.39xfighting0.39xpoison0.39xelectric0.39xrock0.625xbug0.625x— bringing one of those is throwing damage away.

What Galarian Yamask throws at you

Its standard movepool, with the damage window a dodge has to beat.

Fast moves

Move	Power	Energy	Duration	Hits at
ghostAstonishSTAB	7	+13	1.0s	0.60s

Charged moves

Move	Power	Energy	Duration	Hits at
ghostNight ShadeSTAB	60	-50	2.5s	2.00s
rockRock Tomb	65	-50	3.0s	2.05s

Catch CP

What the encounter after the fight can hand you.

IV spread	CP at L20	CP at L25 (weather boosted)
10/10/10floor	516	646
11/11/11	525	657
12/12/12	534	668
13/13/13	543	679
14/14/14	552	690
15/15/15hundo	561	701

Caught CP range 516 - 561, or 646 - 701 when the weather boosts it.

A raid encounter is level 20 (level 25 weather boosted) and cannot roll an IV below 10/10/10. Anything outside the first range is not this raid's reward.

When it is in raids

From the raid schedule, refreshed daily.

Galarian Yamask is not on the raid schedule right now. The simulation above is still exact for the tier chosen — any boss can be simulated, current or not.

All settings

Tier 3: 3,600 HP, 3:00 timer, boss Attack 80 / Defense 113 (15/15/15 at tier CPM 0.73).

Raid bossAttacker levelAttacker IVsWeatherFriendshipDodgingTrainers in the lobbyMega in the lobbyParty Play trainersBoss fast moveBoss charged moveSort by

Attackers allowed

ShadowMega and PrimalLegendary, Mythical, Ultra BeastLegacy and Elite TM moves

Share these exact settings

Every column, and pokebattler.com's own rank

On a phone the list shows estimator, time to win and faints. Overall, Power, win chance, CP, DPS and TDO appear on a wider screen.

#	Attacker	Moveset	Overall	Power	Est.Estimator	TimeTime to win	Faints	Win % (1)	CP	DPS	TDO
1	Mega Greninja waterdarkmega Water Shuriken / Surf+	Water Shuriken / Surf++17 more movesets	100%	356.1%	0.38	1:06	0.3	100%	3,784	54.9	3114
2	Mega Houndoom darkfiremega Snarl / Dark Pulse+	Snarl / Dark Pulse++17 more movesets	90%	329.8%	0.41	1:11	0.4	100%	3,842	52.6	2882
3	Primal Kyogre watermega Waterfall / Origin Pulse	Waterfall / Origin Pulse+5 more movesets	91%	315.0%	0.42	1:15	0.0	100%	5,902	48.6	3620
4	Mega Starmie waterpsychicmega Water Gun / Liquidation+	Water Gun / Liquidation++44 more movesets	82%	313.6%	0.43	1:15	0.9	100%	3,701	51.9	2117
5	Mega Gengar ghostpoisonmega Lick / Shadow Ball	Lick / Shadow Ball+31 more movesets	77%	305.6%	0.44	1:17	1.2	100%	4,336	48.8	1649
6	Necrozma (Dawn Wings) psychicghost Shadow Claw / Moongeist Beam	Shadow Claw / Moongeist Beam+14 more movesets	76%	305.5%	0.44	1:17	1.2	100%	4,099	48.0	1753
7	Shadow Darkrai darkshadow Snarl / Foul Play	Snarl / Foul Play+14 more movesets	79%	296.7%	0.45	1:19	0.7	100%	3,739	46.7	2362
8	Mega Chesnaught grassfightingmega Vine Whip / Seed Bomb+	Vine Whip / Seed Bomb++20 more movesets	87%	295.3%	0.45	1:19	0.0	100%	4,093	48.2	3833
9	Kyurem (Black) dragonice Shadow Claw / Freeze Shock	Shadow Claw / Freeze Shock+11 more movesets	78%	293.7%	0.46	1:20	0.8	100%	4,605	45.3	2061
10	Mega Absol darkmega Snarl / Brutal Swing	Snarl / Brutal Swing+9 more movesets	75%	293.4%	0.46	1:20	0.9	100%	3,301	45.5	1845
11	Kyurem (White) dragonice Ice Fang / Ice Burn	Ice Fang / Ice Burn+17 more movesets	77%	291.2%	0.46	1:21	0.8	100%	4,605	46.0	2113
12	Mega Sceptile grassdragonmega Bullet Seed / Frenzy Plant	Bullet Seed / Frenzy Plant+11 more movesets	76%	291.0%	0.46	1:21	0.9	100%	4,056	45.3	1827
13	Mega Mewtwo Y psychicmega Psycho Cut / Future Sight+	Psycho Cut / Future Sight++26 more movesets	78%	290.3%	0.46	1:21	0.5	100%	6,428	45.1	2687
14	Mega Mewtwo X psychicfightingmega Psycho Cut / Shadow Ball	Psycho Cut / Shadow Ball+26 more movesets	78%	287.2%	0.47	1:22	0.4	100%	6,112	44.3	2754
15	Shadow Kyogre watershadow Waterfall / Origin Pulse	Waterfall / Origin Pulse+5 more movesets	74%	279.6%	0.48	1:24	0.9	100%	4,115	43.3	1892
16	Shadow Gengar ghostpoisonshadow Lick / Shadow Ball	Lick / Shadow Ball+31 more movesets	64%	278.4%	0.48	1:24	2.2	100%	2,878	44.1	1175
17	Shadow Absol darkshadow Snarl / Brutal Swing	Snarl / Brutal Swing+9 more movesets	67%	273.9%	0.49	1:26	1.4	100%	2,526	42.7	1524
18	Shadow Crawdaunt waterdarkshadow Snarl / Crabhammer	Snarl / Crabhammer+11 more movesets	68%	273.8%	0.49	1:26	1.2	100%	2,474	42.3	1619
19	Shadow Chandelure ghostfireshadow Hex / Shadow Ball	Hex / Shadow Ball+19 more movesets	63%	273.5%	0.49	1:26	2.1	100%	3,268	43.1	1142
20	Shadow Kingler watershadow Bubble / Crabhammer	Bubble / Crabhammer+14 more movesets	66%	271.2%	0.49	1:27	1.3	100%	2,829	42.1	1543
21	Mega Banette ghostmega Hex / Shadow Ball	Hex / Shadow Ball+5 more movesets	64%	268.7%	0.50	1:27	1.5	100%	3,594	41.8	1472
22	Mega Tyranitar rockdarkmega Bite / Brutal Swing	Bite / Brutal Swing+15 more movesets	79%	267.6%	0.50	1:28	0.0	100%	5,347	41.4	3635
23	Kartana grasssteel Razor Leaf / Leaf Blade	Razor Leaf / Leaf Blade+14 more movesets	68%	266.1%	0.50	1:28	1.0	100%	3,677	41.4	1741
24	Shadow Weavile darkiceshadow Snarl / Avalanche	Snarl / Avalanche+11 more movesets	65%	266.1%	0.50	1:28	1.3	100%	3,005	41.2	1618
25	Shadow Hydreigon darkdragonshadow Bite / Brutal Swing	Bite / Brutal Swing+9 more movesets	71%	264.5%	0.51	1:29	0.7	100%	3,625	41.5	2282
26	Shadow Tyranitar rockdarkshadow Bite / Brutal Swing	Bite / Brutal Swing+15 more movesets	73%	264.3%	0.51	1:29	0.4	100%	3,834	41.4	2797
27	Shadow Galarian Darmanitan (Standard) iceshadow Ice Fang / Avalanche	Ice Fang / Avalanche+7 more movesets	62%	264.1%	0.51	1:29	1.8	100%	3,105	41.5	1291
28	Shadow Greninja waterdarkshadow Bubble / Hydro Cannon	Bubble / Hydro Cannon+14 more movesets	67%	263.8%	0.51	1:29	1.0	100%	2,654	41.6	1777
29	Mega Swampert watergroundmega Water Gun / Hydro Cannon	Water Gun / Hydro Cannon+11 more movesets	73%	259.3%	0.52	1:31	0.3	100%	4,401	40.4	3076
30	Mega Alakazam psychicmega Psycho Cut / Shadow Ball	Psycho Cut / Shadow Ball+17 more movesets	63%	259.2%	0.52	1:31	1.4	100%	4,510	40.0	1522

How accurate is this? Same top pick as pokebattler.com on 26 of 27 lists checked, 90% of its top tens shared; weakest on Mewtwo's default list (7 of 10).

Ranking. Our full ranking against the page pokebattler.com serves for the same boss and settings, on 27 boss and filter combinations read live (2026-10-04): 242 of 270 top-ten places shared, the same #1 on 26. On the six fixed reference bosses (read 2026-10-03): 85% top-ten overlap with its default filters, 83% with Shadow, Mega and Legendary on. A close top three is shown as a tie because the order inside it is below what we can measure.

Time to win. Graded with Pokebattler's own movesets against every boss moveset, average per boss: Tier 1 and 3 +0.1% to +1.2%; Tier 5 −2.9% to +1.3%; Mega −1.1% to +2.6%; Shadow Tier 5 −1.8% to +0.3%. One attacker can be off by more: median 1.6%, worst 15%, RMS per boss moveset 2.05%.

Known weak spots.

Mewtwo (Tier 5, default filters) shares 7 of Pokebattler's top 10: Absol, Incineroar and Salamence sit just outside ours, Polteageist, Cursola and Hisuian Typhlosion just inside.
Groudon (Tier 5, default filters) shares 7 of 10; its Grass and Water counters run 2-6% fast here.
Tier 5 times run about 2-3% fast for attackers that faint often, and 2-3% slow on Mega Charizard Y and Mega Beedrill, whose counters resist the boss.
Tier 1 lists are the least checked: Combee (Tier 1) shares only 3 of Pokebattler's top 10, with Gigalith first here where Pokebattler puts Rhyperior.

This boss on pokebattler.com. Boss-by-boss accuracy report.

Ranked 30 attackers in 0.4 s (50 Monte Carlo runs each, seed 1). Same boss on pokebattler.com. The same ranking as JSON: /api/raids/rank.