Mega Mewtwo Y counters

#0150

psychicSuper Mega

Lobby CP

104,400

25,000

Timer

5:00

Attack

338

Defense

188

Difficulty

3.73

Pokebattler scale

Beating Mega Mewtwo Y should take 4 trainers with level 40 counters. Caught CP 2,294-2,387 (you catch Mewtwo).

Weak tobug1.6xghost1.6xdark1.6x

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 Dark Mega — most top counters attack with Dark

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+ also breaks two Super Mega shields at once; that part is not simulated. Sources: the full list, Behemoth Blade / Bash, Dynamic Punch+.

Best counters

Mega, Legendary, Shadow · level 40

The best Mega Mewtwo Y counters are Mega Houndoom, Necrozma (Dawn Wings), Shadow Darkrai, Shadow Tyranitar, Shadow Giratina (Origin) & Shadow Hydreigon.

Suggested party of sixat most one Mega

M. Houndoom
Necrozma (Dawn Wings)
S. Darkrai
S. Tyranitar
S. Giratina (Origin)
S. Hydreigon

5 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 HoundoomMegapartySnarl / Dark Pulse+3.3915:37
2Necrozma (Dawn Wings)LegendarypartyShadow Claw / Moongeist Beam3.4215:43
3Mega Mewtwo YMegaLegendaryPsycho Cut / Shadow Ball3.6816:55
4Shadow DarkraiShadowLegendarypartySnarl / Foul Play3.9318:06
5Mega Mewtwo XMegaLegendaryPsycho Cut / Shadow Ball3.9518:11
6Mega TyranitarMegaBite / Brutal Swing3.9818:19
7Mega BeedrillMegaBug Bite / Fell Stinger+4.0818:46
8Shadow TyranitarShadowpartyBite / Brutal Swing4.0818:47
9Shadow Giratina (Origin)ShadowLegendarypartyShadow Claw / Shadow Force4.2219:25
10Mega GengarMegaLick / Shadow Ball4.2319:28
11Shadow HydreigonShadowpartyBite / Brutal Swing4.3419:58

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

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

Best from your Pokebox

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

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Raid tier — Super Mega 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 countersMega Mewtwo X Mewtwo

Raid alerts…

Top 15 Mega Mewtwo Y 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.

Trainers4small group

#	Attacker	Moveset
1	Mega Houndoomdarkfirejoint top pick	darkSnarldarkDark Pulse+	3,842	15:37	3.39	6.0	32.4%
2	Necrozma (Dawn Wings)psychicghostjoint top pick	ghostShadow ClawghostMoongeist Beam	4,099	15:43	3.42	6.0	32.3%
3	Mega Mewtwo Ypsychic	psychicPsycho CutghostShadow Ball	6,428	16:55	3.68	6.0	30.0%
4	Shadow Darkraidark	darkSnarldarkFoul Play	3,739	18:06	3.93	6.0	28.0%
5	Mega Mewtwo Xpsychicfighting	psychicPsycho CutghostShadow Ball	6,112	18:11	3.95	6.0	27.9%
6	Mega Tyranitarrockdark	darkBitedarkBrutal Swing	5,347	18:19	3.98	6.0	27.7%
7	Mega Beedrillbugpoison	bugBug BitebugFell Stinger+	3,383	18:46	4.08	6.0	27.0%
8	Shadow Tyranitarrockdark	darkBitedarkBrutal Swing	3,834	18:47	4.08	6.0	27.0%
9	Shadow Giratina (Origin)ghostdragon	ghostShadow ClawghostShadow Force	3,683	19:25	4.22	6.0	26.1%
10	Mega Gengarghostpoison	ghostLickghostShadow Ball	4,336	19:28	4.23	6.0	26.0%
11	Shadow Hydreigondarkdragon	darkBitedarkBrutal Swing	3,625	19:58	4.34	6.0	25.4%
12	Mega Absoldark	darkSnarldarkBrutal Swing	3,301	20:05	4.37	6.0	25.2%
13	Lunalapsychicghost	ghostShadow ClawghostShadow Ball	4,042	20:08	4.38	6.0	25.2%
14	Shadow Mewtwopsychic	psychicPsycho CutghostShadow Ball	4,178	20:31	4.46	6.0	24.7%
15	Mega Pinsirbugflying	bugFury CutterbugX-Scissor	4,182	20:56	4.55	6.0	24.2%

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 Mega Mewtwo Y.

Estimator is how many trainers of this strength the fight needs. Power is the share of Mega Mewtwo Y'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.

“Joint top pick”: 2 attackers inside 2.1% of each other — this simulator's own accuracy against pokebattler.com (median 1.6% per attacker), so any of them is the right answer.

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 % (4)	Overall	Power	Time to win	Faints	Estimator
Random (any moveset)showing	81%	26%	28.3%	17:56	6.0	3.90
Psycho Cut / Focus Blast	33%	25%	21.6%	23:29	6.0	5.10
Confusion / Focus Blast	33%	24%	23.5%	21:34	6.0	4.69
Psycho Cut / Ice Beam	82%	25%	26.9%	18:51	6.0	4.10
Confusion / Ice Beam	79%	25%	27.6%	18:24	6.0	4.00
Confusion / Future Sight+	83%	29%	28.7%	17:41	6.0	3.84
Psycho Cut / Thunderbolt	100%	29%	29.8%	16:60	6.0	3.69
Psycho Cut / Future Sight+	96%	30%	30.0%	16:53	6.0	3.67
Confusion / Thunderbolt	100%	30%	30.4%	16:39	6.0	3.62
Psycho Cut / Flamethrower	100%	36%	30.5%	16:36	6.0	3.61
Confusion / Psychic	100%	37%	30.6%	16:33	6.0	3.60
Confusion / Flamethrower	100%	35%	30.8%	16:29	6.0	3.58
Psycho Cut / Psychic	100%	39%	30.8%	16:27	6.0	3.58

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 4 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…

Mega Mewtwo Y 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.

bug1.6x ghost1.6x dark1.6x normal1x flying1x poison1x ground1x rock1x steel1x fire1x water1x grass1x electric1x ice1x dragon1x fairy1x fighting0.63x psychic0.63x

Weak (3)
Neutral (13)
Resists (2)

It resists fighting0.625xpsychic0.625x— bringing one of those is throwing damage away.

What Mega Mewtwo Y throws at you

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

Fast moves

Move	Power	Energy	Duration	Hits at
psychicConfusionSTAB	19	+14	1.5s	0.50s
psychicPsycho CutSTAB	4	+7	0.5s	0.27s

Charged moves

Move	Power	Energy	Duration	Hits at
psychicFuture Sight+STAB	140	-100	2.5s	1.20s
fightingFocus Blast	140	-100	3.5s	3.00s
psychicPsychicSTAB	95	-50	3.0s	1.50s
fireFlamethrower	65	-50	2.0s	1.30s
electricThunderbolt	80	-50	2.5s	1.80s
iceIce Beam	95	-50	3.5s	1.50s

Catch CP

What the encounter after the fight can hand you.

IV spread	CP at L20	CP at L25 (weather boosted)
10/10/10floor	2,294	2,868
11/11/11	2,312	2,891
12/12/12	2,331	2,914
13/13/13	2,350	2,937
14/14/14	2,368	2,961
15/15/15hundo	2,387	2,984

Caught CP range 2,294 - 2,387, or 2,868 - 2,984 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.

Mega Mewtwo Y 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

Super Mega: 25,000 HP, 5:00 timer, boss Attack 338 / Defense 188 (15/15/15 at tier CPM 0.79).

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 % (4)	CP	DPS	TDO
1	Mega Houndoom top pickdarkfiremega Snarl / Dark Pulse+	Snarl / Dark Pulse++17 more movesets	99%	32.4%	3.39	15:37	53.3	84%	3,842	29.5	625
2	Necrozma (Dawn Wings) top pickpsychicghost Shadow Claw / Moongeist Beam	Shadow Claw / Moongeist Beam+14 more movesets	100%	32.3%	3.42	15:43	45.4	100%	4,099	28.3	622
3	Mega Mewtwo Y psychicmega Psycho Cut / Shadow Ball	Psycho Cut / Shadow Ball+26 more movesets	93%	30.0%	3.68	16:55	44.7	100%	6,428	26.1	584
4	Shadow Darkrai darkshadow Snarl / Foul Play	Snarl / Foul Play+14 more movesets	82%	28.0%	3.93	18:06	75.5	84%	3,739	25.4	392
5	Mega Mewtwo X psychicfightingmega Psycho Cut / Shadow Ball	Psycho Cut / Shadow Ball+26 more movesets	84%	27.9%	3.95	18:11	57.8	90%	6,112	24.6	468
6	Mega Tyranitar rockdarkmega Bite / Brutal Swing	Bite / Brutal Swing+15 more movesets	84%	27.7%	3.98	18:19	53.6	84%	5,347	24.5	724
7	Mega Beedrill bugpoisonmega Bug Bite / Fell Stinger+	Bug Bite / Fell Stinger++23 more movesets	76%	27.0%	4.08	18:46	113.7	66%	3,383	26.6	268
8	Shadow Tyranitar rockdarkshadow Bite / Brutal Swing	Bite / Brutal Swing+15 more movesets	80%	27.0%	4.08	18:47	68.7	84%	3,834	24.3	489
9	Shadow Giratina (Origin) ghostdragonshadow Shadow Claw / Shadow Force	Shadow Claw / Shadow Force+7 more movesets	78%	26.1%	4.22	19:25	65.9	80%	3,683	23.2	452
10	Mega Gengar ghostpoisonmega Lick / Shadow Ball	Lick / Shadow Ball+31 more movesets	74%	26.0%	4.23	19:28	101.8	66%	4,336	24.7	327
11	Shadow Hydreigon darkdragonshadow Bite / Brutal Swing	Bite / Brutal Swing+9 more movesets	74%	25.4%	4.34	19:58	86.5	68%	3,625	23.5	433
12	Mega Absol darkmega Snarl / Brutal Swing	Snarl / Brutal Swing+9 more movesets	72%	25.2%	4.37	20:05	99.8	68%	3,301	23.8	314
13	Lunala psychicghost Shadow Claw / Shadow Ball	Shadow Claw / Shadow Ball+11 more movesets	77%	25.2%	4.38	20:08	53.0	54%	4,042	21.9	533
14	Shadow Mewtwo psychicshadow Psycho Cut / Shadow Ball	Psycho Cut / Shadow Ball+23 more movesets	72%	24.7%	4.46	20:31	76.1	28%	4,178	22.0	346
15	Mega Pinsir bugflyingmega Fury Cutter / X-Scissor	Fury Cutter / X-Scissor+14 more movesets	69%	24.2%	4.55	20:56	96.0	34%	4,182	22.1	301
16	Mega Greninja waterdarkmega Feint Attack / Surf+	Feint Attack / Surf++17 more movesets	71%	24.2%	4.55	20:57	80.2	62%	3,784	22.1	412
17	Mega Delphox firepsychicmega Fire Spin / Mystical Fire+	Fire Spin / Mystical Fire++23 more movesets	73%	24.2%	4.56	20:58	59.2	8%	4,783	21.1	452
18	Darkrai dark Snarl / Foul Play	Snarl / Foul Play+14 more movesets	70%	24.2%	4.56	20:58	80.2	60%	3,739	21.8	392
19	Zamazenta (Crowned Shield) fightingsteel Metal Claw / Behemoth Bash	Metal Claw / Behemoth Bash+7 more movesets	70%	23.7%	4.64	21:22	73.9	0%	4,172	21.0	384
20	Hydreigon darkdragon Bite / Brutal Swing	Bite / Brutal Swing+9 more movesets	69%	23.4%	4.72	21:42	75.2	52%	3,625	20.9	458
21	Shadow Salamence dragonflyingshadow Bite / Brutal Swing	Bite / Brutal Swing+20 more movesets	66%	23.3%	4.72	21:44	112.8	56%	3,749	21.9	278
22	Tyranitar rockdark Bite / Brutal Swing	Bite / Brutal Swing+15 more movesets	69%	23.2%	4.74	21:49	71.8	30%	3,834	20.8	492
23	Mega Rayquaza dragonflyingmega Dragon Tail / Dragon Ascent	Dragon Tail / Dragon Ascent+11 more movesets	67%	23.2%	4.75	21:51	89.8	64%	5,713	21.6	394
24	Mega Salamence dragonflyingmega Bite / Brutal Swing	Bite / Brutal Swing+20 more movesets	67%	23.2%	4.75	21:52	85.1	38%	5,031	21.0	397
25	Shadow Weavile darkiceshadow Snarl / Foul Play	Snarl / Foul Play+11 more movesets	65%	23.0%	4.79	22:04	103.7	46%	3,005	21.3	306
26	Shadow Houndoom darkfireshadow Snarl / Foul Play	Snarl / Foul Play+14 more movesets	65%	22.7%	4.84	22:17	94.6	0%	2,635	20.7	309
27	Mega Banette ghostmega Shadow Claw / Shadow Ball	Shadow Claw / Shadow Ball+5 more movesets	62%	22.3%	4.94	22:43	123.7	54%	3,594	21.3	253
28	Eternatus poisondragon Dragon Tail / Dynamax Cannon	Dragon Tail / Dynamax Cannon+7 more movesets	63%	21.9%	5.02	23:06	92.2	34%	4,429	20.5	380
29	Kyurem (Black) dragonice Shadow Claw / Freeze Shock	Shadow Claw / Freeze Shock+11 more movesets	62%	21.8%	5.06	23:17	100.6	14%	4,605	20.2	328
30	Shadow Regigigas normalshadow Hidden Power / Crush Grip	Hidden Power / Crush Grip+7 more movesets	54%	19.3%	5.69	26:12	120.3	10%	4,346	18.9	267

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.

Boss-by-boss accuracy report.

Ranked 30 attackers in 2.5 s (50 Monte Carlo runs each, seed 1). The same ranking as JSON: /api/raids/rank.