Castform (Rainy) counters

#0351

waterTier 3

Lobby CP

11,466

3,600

Timer

3:00

Attack

112

Defense

112

Difficulty

0.44

Pokebattler scale

Beating Castform (Rainy) should take 1 trainer with level 40 counters. Caught CP 875-932.

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+ 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 Castform (Rainy) counters are Mega Raichu Y, Shadow Thundurus (Therian), Regieleki, Shadow Raikou, Thundurus (Therian) & Kartana.

Suggested party of sixat most one Mega

M. Raichu Y
S. Thundurus (Therian)
Regieleki
S. Raikou
Thundurus (Therian)
Kartana

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 Raichu YMegapartyThunder Shock / Zap Cannon+0.381:07
2Mega Raichu XMegaThunder Shock / Volt Tackle+0.431:15
3Shadow Thundurus (Therian)ShadowLegendarypartyVolt Switch / Wildbolt Storm0.441:18
4Mega SceptileMegaFury Cutter / Frenzy Plant0.451:19
5Mega ChesnaughtMegaVine Whip / Seed Bomb+0.451:19
6Mega Mewtwo YMegaLegendaryPsycho Cut / Future Sight+0.451:20
7Mega Mewtwo XMegaLegendaryPsycho Cut / Dynamic Punch+0.471:23
8RegielekiLegendarypartyLock-On / Thunder Cage0.481:25
9Shadow RaikouShadowLegendarypartyThunder Shock / Wild Charge0.491:27
10Thundurus (Therian)LegendarypartyVolt Switch / Wildbolt Storm0.501:27
11KartanaLegendarypartyRazor Leaf / Leaf Blade0.501:27

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 — 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

Raid alerts…

Top 15 Castform (Rainy) 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 Raichu Yelectricjoint top pick	electricThunder ShockelectricZap Cannon+	3,780	1:07	0.38	1.7	351.1%
2	Mega Raichu Xelectric	electricThunder ShockelectricVolt Tackle+	3,510	1:15	0.43	1.4	311.5%
3	Shadow Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	1:18	0.44	2.3	301.6%
4	Mega Sceptilegrassdragon	bugFury CuttergrassFrenzy Plant	4,056	1:19	0.45	0.6	298.2%
5	Mega Chesnaughtgrassfighting	grassVine WhipgrassSeed Bomb+	4,093	1:19	0.45	0.2	297.4%
6	Mega Mewtwo Ypsychic	psychicPsycho CutpsychicFuture Sight+	6,428	1:20	0.45	1.1	294.8%
7	Mega Mewtwo Xpsychicfighting	psychicPsycho CutfightingDynamic Punch+	6,112	1:23	0.47	1.1	282.4%
8	Regielekielectric	normalLock-OnelectricThunder Cage	2,803	1:25	0.48	2.2	277.6%
9	Shadow Raikouelectric	electricThunder ShockelectricWild Charge	3,452	1:27	0.49	1.8	270.0%
10	Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	1:27	0.50	1.8	269.8%
11	Kartanagrasssteel	grassRazor LeafgrassLeaf Blade	3,677	1:27	0.50	1.6	268.3%
12	Xurkitreeelectric	electricThunder ShockelectricDischarge	3,937	1:28	0.50	2.0	267.1%
13	Zeraoraelectric	electricVolt SwitchelectricPlasma Fists	3,419	1:29	0.51	1.8	264.6%
14	Mega Manectricelectric	electricThunder FangelectricWild Charge	3,580	1:29	0.51	2.0	264.4%
15	Shadow Electivireelectric	electricThunder ShockelectricWild Charge	3,079	1:30	0.51	2.8	261.7%

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 Castform (Rainy).

Estimator is how many trainers of this strength the fight needs. Power is the share of Castform (Rainy)'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%	190%	288.3%	1:21	1.9	0.46
Water Gun / Hydro Pump	100%	158%	279.1%	1:24	2.5	0.48
Tackle / Hydro Pump	100%	158%	279.1%	1:24	2.5	0.48
Water Gun / Weather Ball (Water)	100%	194%	288.0%	1:21	1.8	0.46
Tackle / Weather Ball (Water)	100%	196%	289.4%	1:21	1.8	0.46
Water Gun / Thunder	100%	231%	293.2%	1:20	1.3	0.46
Tackle / Thunder	100%	235%	295.3%	1:19	1.2	0.45

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…

Castform (Rainy) 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 Castform (Rainy) 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
normalTackle	5	+5	0.5s	0.30s

Charged moves

Move	Power	Energy	Duration	Hits at
waterHydro PumpSTAB	135	-100	3.5s	1.10s
waterWeather Ball (Water)STAB	55	-33	1.5s	1.25s
electricThunder	100	-100	2.5s	1.30s

Catch CP

What the encounter after the fight can hand you.

IV spread	CP at L20	CP at L25 (weather boosted)
10/10/10floor	875	1,094
11/11/11	886	1,108
12/12/12	898	1,122
13/13/13	909	1,137
14/14/14	921	1,151
15/15/15hundo	932	1,165

Caught CP range 875 - 932, or 1,094 - 1,165 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.

Castform (Rainy) 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 112 / Defense 112 (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 Raichu Y electricmega Thunder Shock / Zap Cannon+	Thunder Shock / Zap Cannon++35 more movesets	100%	351.1%	0.38	1:07	1.5	100%	3,780	58.4	1527
2	Mega Raichu X electricmega Thunder Shock / Volt Tackle+	Thunder Shock / Volt Tackle++35 more movesets	91%	311.5%	0.43	1:15	1.3	100%	3,510	51.9	1700
3	Shadow Thundurus (Therian) electricflyingshadow Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	82%	301.6%	0.44	1:18	2.1	100%	3,659	48.9	1202
4	Mega Sceptile grassdragonmega Fury Cutter / Frenzy Plant	Fury Cutter / Frenzy Plant+11 more movesets	93%	298.2%	0.45	1:19	0.5	100%	4,056	46.1	2533
5	Mega Chesnaught grassfightingmega Vine Whip / Seed Bomb+	Vine Whip / Seed Bomb++20 more movesets	98%	297.4%	0.45	1:19	0.2	100%	4,093	48.5	3365
6	Mega Mewtwo Y psychicmega Psycho Cut / Future Sight+	Psycho Cut / Future Sight++26 more movesets	88%	294.8%	0.45	1:20	1.0	100%	6,428	45.9	1779
7	Mega Mewtwo X psychicfightingmega Psycho Cut / Dynamic Punch+	Psycho Cut / Dynamic Punch++26 more movesets	83%	282.4%	0.47	1:23	1.0	100%	6,112	44.1	1745
8	Regieleki electric Lock-On / Thunder Cage	Lock-On / Thunder Cage+11 more movesets	75%	277.6%	0.48	1:25	2.0	100%	2,803	44.4	1282
9	Shadow Raikou electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	74%	270.0%	0.49	1:27	1.7	100%	3,452	42.0	1379
10	Thundurus (Therian) electricflying Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	74%	269.8%	0.50	1:27	1.6	100%	3,659	42.6	1365
11	Kartana grasssteel Razor Leaf / Leaf Blade	Razor Leaf / Leaf Blade+14 more movesets	75%	268.3%	0.50	1:27	1.5	100%	3,677	41.7	1471
12	Xurkitree electric Thunder Shock / Discharge	Thunder Shock / Discharge+7 more movesets	73%	267.1%	0.50	1:28	1.8	100%	3,937	41.5	1299
13	Zeraora electric Volt Switch / Plasma Fists	Volt Switch / Plasma Fists+9 more movesets	74%	264.6%	0.51	1:29	1.6	100%	3,419	41.2	1421
14	Mega Manectric electricmega Thunder Fang / Wild Charge	Thunder Fang / Wild Charge+14 more movesets	72%	264.4%	0.51	1:29	1.8	100%	3,580	41.2	1295
15	Shadow Electivire electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	68%	261.7%	0.51	1:30	2.5	100%	3,079	41.2	1070
16	Zekrom dragonelectric Charge Beam / Fusion Bolt	Charge Beam / Fusion Bolt+9 more movesets	79%	256.1%	0.52	1:32	0.6	100%	4,038	40.7	2534
17	Mega Rayquaza dragonflyingmega Dragon Tail / Dragon Ascent	Dragon Tail / Dragon Ascent+11 more movesets	77%	255.6%	0.52	1:32	0.9	100%	5,713	39.7	1824
18	Shadow Magnezone electricsteelshadow Volt Switch / Wild Charge	Volt Switch / Wild Charge+15 more movesets	69%	255.4%	0.52	1:32	1.9	100%	3,205	40.1	1265
19	Shadow Zapdos electricflyingshadow Thunder Shock / Thunderbolt	Thunder Shock / Thunderbolt+11 more movesets	68%	253.4%	0.53	1:33	2.1	100%	3,527	39.5	1117
20	Shadow Sceptile grassshadow Bullet Seed / Frenzy Plant	Bullet Seed / Frenzy Plant+11 more movesets	68%	251.0%	0.53	1:34	1.9	100%	2,757	38.8	1234
21	Shadow Chesnaught grassfightingshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+17 more movesets	71%	247.0%	0.54	1:35	1.2	100%	2,954	38.5	1659
22	Shaymin (Sky) grassflying Magical Leaf / Grass Knot	Magical Leaf / Grass Knot+11 more movesets	70%	244.4%	0.55	1:36	1.3	100%	3,592	38.1	1572
23	Mega Venusaur grasspoisonmega Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	73%	244.2%	0.55	1:36	0.9	100%	3,698	38.0	1801
24	Shadow Venusaur grasspoisonshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	69%	244.1%	0.55	1:36	1.4	100%	2,720	38.1	1486
25	Shadow Luxray electricshadow Spark / Wild Charge	Spark / Wild Charge+14 more movesets	63%	243.8%	0.55	1:36	2.6	100%	2,888	38.3	1055
26	Shadow Tangrowth grassshadow Vine Whip / Power Whip	Vine Whip / Power Whip+9 more movesets	68%	238.9%	0.56	1:38	1.2	100%	3,030	37.0	1611
27	Mega Ampharos electricdragonmega Charge Beam / Zap Cannon	Charge Beam / Zap Cannon+15 more movesets	73%	238.7%	0.56	1:38	0.6	100%	4,245	36.7	2418
28	Mega Victreebel grasspoisonmega Magical Leaf / Leaf Blade	Magical Leaf / Leaf Blade+23 more movesets	68%	238.0%	0.56	1:39	1.2	100%	3,505	36.7	1593
29	Shadow Manectric electricshadow Thunder Fang / Wild Charge	Thunder Fang / Wild Charge+14 more movesets	60%	237.8%	0.56	1:39	3.2	100%	2,340	37.4	872
30	Shadow Thundurus (Incarnate) electricflyingshadow Thunder Shock / Thunder Punch	Thunder Shock / Thunder Punch+7 more movesets	60%	235.3%	0.57	1:40	3.0	100%	3,345	36.6	886

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.