Mega Blastoise counters

#0009

waterMega LegendaryNext in raids Wed 7 Oct, 06:00 (starts in 2 days)

Lobby CP

66,434

22,500

Timer

5:00

Attack

220

Defense

199

Difficulty

3.33

Pokebattler scale

Beating Mega Blastoise should take 4 trainers with level 40 counters. Caught CP 1,338-1,409 (you catch Blastoise).

Weak tograss1.6xelectric1.6x

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 an Electric Mega — most top counters attack with Electric

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 Blastoise counters are Mega Raichu X, Shadow Raikou, Zeraora, Kartana, Xurkitree & Shadow Thundurus (Therian).

Suggested party of sixat most one Mega

M. Raichu X
S. Raikou
Zeraora
Kartana
Xurkitree
S. Thundurus (Therian)

4 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 Raichu XMegapartyThunder Shock / Volt Tackle+3.0614:14
2Mega Raichu YMegaThunder Shock / Zap Cannon+3.0714:15
3Mega Mewtwo YMegaLegendaryPsycho Cut / Future Sight+3.2014:53
4Mega ChesnaughtMegaVine Whip / Seed Bomb+3.2415:03
5Mega Mewtwo XMegaLegendaryPsycho Cut / Dynamic Punch+3.6617:01
6Shadow RaikouShadowLegendarypartyThunder Shock / Wild Charge3.7217:16
7ZeraoraLegendarypartyVolt Switch / Plasma Fists3.7217:18
8KartanaLegendarypartyRazor Leaf / Leaf Blade3.8117:43
9XurkitreeLegendarypartyThunder Shock / Discharge3.8217:47
10Shadow Thundurus (Therian)ShadowLegendarypartyVolt Switch / Wildbolt Storm3.8317:47

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

Pokebox

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

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Raid tier — Legendary 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 countersBlastoise

Raid alerts…

Top 15 Mega Blastoise 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 Raichu Xelectricjoint top pick	electricThunder ShockelectricVolt Tackle+	3,510	14:14	3.06	6.0	35.6%
2	Mega Raichu Yelectricjoint top pick	electricThunder ShockelectricZap Cannon+	3,780	14:15	3.07	6.0	35.6%
3	Mega Mewtwo Ypsychic	psychicPsycho CutpsychicFuture Sight+	6,428	14:53	3.20	6.0	34.1%
4	Mega Chesnaughtgrassfighting	grassVine WhipgrassSeed Bomb+	4,093	15:03	3.24	6.0	33.7%
5	Mega Mewtwo Xpsychicfighting	psychicPsycho CutfightingDynamic Punch+	6,112	17:01	3.66	6.0	29.8%
6	Shadow Raikouelectric	electricThunder ShockelectricWild Charge	3,452	17:16	3.72	6.0	29.4%
7	Zeraoraelectric	electricVolt SwitchelectricPlasma Fists	3,419	17:18	3.72	6.0	29.3%
8	Kartanagrasssteel	grassRazor LeafgrassLeaf Blade	3,677	17:43	3.81	6.0	28.6%
9	Xurkitreeelectric	electricThunder ShockelectricDischarge	3,937	17:47	3.82	6.0	28.5%
10	Shadow Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	17:47	3.83	6.0	28.5%
11	Mega Manectricelectric	electricThunder FangelectricWild Charge	3,580	17:49	3.83	6.0	28.5%
12	Shadow Magnezoneelectricsteel	electricVolt SwitchelectricWild Charge	3,205	17:49	3.83	6.0	28.5%
13	Mega Rayquazadragonflying	dragonDragon TailflyingDragon Ascent	5,713	18:02	3.88	6.0	28.1%
14	Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	18:09	3.90	6.0	27.9%
15	Shadow Zapdoselectricflying	electricThunder ShockelectricThunderbolt	3,527	18:27	3.97	6.0	27.5%

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 Blastoise.

Estimator is how many trainers of this strength the fight needs. Power is the share of Mega Blastoise'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	97%	30%	29.8%	17:01	6.0	3.66
Bite / Hydro Pump	83%	24%	27.5%	18:26	6.0	3.97
Water Gun / Hydro Pump	83%	25%	27.5%	18:26	6.0	3.97
Rollout / Hydro Pump	97%	26%	29.1%	17:26	6.0	3.75
Water Gun / Skull Bash	100%	28%	29.7%	17:05	6.0	3.67
Bite / Skull Bash	100%	27%	29.7%	17:05	6.0	3.67
Rollout / Ice Beam	100%	30%	29.9%	16:57	6.0	3.65
Rollout / Skull Bash	100%	28%	29.9%	16:56	6.0	3.64
Water Gun / Ice Beam	100%	30%	30.4%	16:42	6.0	3.59
Bite / Ice Beam	100%	30%	30.4%	16:42	6.0	3.59
Bite / Flash Cannon	100%	42%	31.6%	16:04	6.0	3.46
Water Gun / Flash Cannon	100%	43%	31.6%	16:03	6.0	3.45
Rollout / Flash Cannon	100%	41%	31.8%	15:57	6.0	3.43

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 Blastoise 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.

grass1.6x electric1.6x normal1x fighting1x flying1x poison1x ground1x rock1x bug1x ghost1x psychic1x dragon1x dark1x fairy1x steel0.63x fire0.63x water0.63x ice0.63x

Weak (2)
Neutral (12)
Resists (4)

It resists steel0.625xfire0.625xwater0.625xice0.625x— bringing one of those is throwing damage away.

What Mega Blastoise throws at you

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

Fast moves

Move	Power	Energy	Duration	Hits at
waterWater GunSTAB	5	+5	0.5s	0.30s
darkBite	6	+4	0.5s	0.30s
rockRollout	15	+19	1.5s	1.06s

Charged moves

Move	Power	Energy	Duration	Hits at
waterHydro PumpSTAB	135	-100	3.5s	1.10s
normalSkull Bash	130	-100	3.0s	1.70s
steelFlash Cannon	100	-100	2.5s	1.40s
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	1,338	1,673
11/11/11	1,352	1,691
12/12/12	1,366	1,708
13/13/13	1,380	1,726
14/14/14	1,394	1,743
15/15/15hundo	1,409	1,761

Caught CP range 1,338 - 1,409, or 1,673 - 1,761 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.

comingMega BlastoiseMegashiny availableWed 7 Oct, 06:00 – Tue 13 Oct, 22:00 · starts in 2 days

All settings

Mega Legendary: 22,500 HP, 5:00 timer, boss Attack 220 / Defense 199 (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 Raichu X top pickelectricmega Thunder Shock / Volt Tackle+	Thunder Shock / Volt Tackle++35 more movesets	100%	35.6%	3.06	14:14	39.2	100%	3,510	28.1	610
2	Mega Raichu Y top pickelectricmega Thunder Shock / Zap Cannon+	Thunder Shock / Zap Cannon++35 more movesets	97%	35.6%	3.07	14:15	52.1	98%	3,780	29.0	510
3	Mega Mewtwo Y psychicmega Psycho Cut / Future Sight+	Psycho Cut / Future Sight++26 more movesets	97%	34.1%	3.20	14:53	34.5	100%	6,428	26.5	691
4	Mega Chesnaught grassfightingmega Vine Whip / Seed Bomb+	Vine Whip / Seed Bomb++20 more movesets	97%	33.7%	3.24	15:03	30.0	100%	4,093	26.0	787
5	Mega Mewtwo X psychicfightingmega Psycho Cut / Dynamic Punch+	Psycho Cut / Dynamic Punch++26 more movesets	84%	29.8%	3.66	17:01	39.5	100%	6,112	23.2	605
6	Shadow Raikou electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	80%	29.4%	3.72	17:16	50.5	100%	3,452	23.1	479
7	Zeraora electric Volt Switch / Plasma Fists	Volt Switch / Plasma Fists+9 more movesets	81%	29.3%	3.72	17:18	46.7	100%	3,419	23.0	520
8	Kartana grasssteel Razor Leaf / Leaf Blade	Razor Leaf / Leaf Blade+14 more movesets	77%	28.6%	3.81	17:43	57.4	100%	3,677	22.7	415
9	Xurkitree electric Thunder Shock / Discharge	Thunder Shock / Discharge+7 more movesets	76%	28.5%	3.82	17:47	62.7	100%	3,937	22.8	385
10	Shadow Thundurus (Therian) electricflyingshadow Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	75%	28.5%	3.83	17:47	75.3	82%	3,659	23.9	377
11	Mega Manectric electricmega Thunder Fang / Wild Charge	Thunder Fang / Wild Charge+14 more movesets	77%	28.5%	3.83	17:49	55.9	100%	3,580	22.5	430
12	Shadow Magnezone electricsteelshadow Volt Switch / Wild Charge	Volt Switch / Wild Charge+15 more movesets	79%	28.5%	3.83	17:49	45.8	100%	3,205	22.2	551
13	Mega Rayquaza dragonflyingmega Dragon Tail / Dragon Ascent	Dragon Tail / Dragon Ascent+11 more movesets	77%	28.1%	3.88	18:02	50.2	100%	5,713	22.1	487
14	Thundurus (Therian) electricflying Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	75%	27.9%	3.90	18:09	59.5	100%	3,659	22.2	415
15	Shadow Zapdos electricflyingshadow Thunder Shock / Thunderbolt	Thunder Shock / Thunderbolt+11 more movesets	73%	27.5%	3.97	18:27	61.9	100%	3,527	21.9	391
16	Shadow Electivire electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	72%	27.3%	3.99	18:34	74.0	76%	3,079	22.2	357
17	Shadow Tangrowth grassshadow Vine Whip / Power Whip	Vine Whip / Power Whip+9 more movesets	73%	27.2%	4.00	18:37	59.1	100%	3,030	21.6	400
18	Shadow Chesnaught grassfightingshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+17 more movesets	73%	27.0%	4.04	18:46	56.5	100%	2,954	21.3	425
19	Zekrom dragonelectric Charge Beam / Fusion Bolt	Charge Beam / Fusion Bolt+9 more movesets	74%	26.9%	4.06	18:52	48.4	84%	4,038	21.0	536
20	Eternatus poisondragon Poison Jab / Dynamax Cannon	Poison Jab / Dynamax Cannon+7 more movesets	74%	26.7%	4.08	18:58	43.5	100%	4,429	20.8	539
21	Mega Venusaur grasspoisonmega Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	72%	26.4%	4.13	19:11	52.2	74%	3,698	20.7	466
22	Shadow Sceptile grassshadow Fury Cutter / Frenzy Plant	Fury Cutter / Frenzy Plant+11 more movesets	69%	26.4%	4.14	19:15	75.9	74%	2,757	21.3	322
23	Regieleki electric Thunder Shock / Thunder Cage	Thunder Shock / Thunder Cage+11 more movesets	69%	26.2%	4.17	19:23	75.9	76%	2,803	22.0	385
24	Mega Sceptile grassdragonmega Fury Cutter / Frenzy Plant	Fury Cutter / Frenzy Plant+11 more movesets	68%	26.2%	4.17	19:23	85.2	74%	4,056	22.6	440
25	Shadow Venusaur grasspoisonshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	69%	26.0%	4.20	19:31	67.3	84%	2,720	20.7	349
26	Zarude darkgrass Vine Whip / Power Whip	Vine Whip / Power Whip+5 more movesets	71%	25.9%	4.21	19:34	48.4	92%	3,833	20.2	488
27	Shadow Mewtwo psychicshadow Psycho Cut / Thunderbolt	Psycho Cut / Thunderbolt+23 more movesets	68%	25.7%	4.24	19:43	64.8	78%	4,178	20.4	362
28	Shadow Regigigas normalshadow Hidden Power / Crush Grip	Hidden Power / Crush Grip+7 more movesets	69%	25.6%	4.26	19:48	53.9	60%	4,346	20.1	442
29	Electivire electric Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	67%	25.4%	4.30	19:59	63.9	54%	3,079	20.1	376
30	Mega Ampharos electricdragonmega Volt Switch / Zap Cannon	Volt Switch / Zap Cannon+15 more movesets	67%	24.9%	4.38	20:20	55.0	36%	4,245	19.6	466

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 2.2 s (50 Monte Carlo runs each, seed 1). The same ranking as JSON: /api/raids/rank.