Shadow raid

Shadow Shellder counters

#0090

waterShadow Tier 1

A Shadow raid boss hits harder than its normal form (Shadow Frenzy), and the Pokemon you catch afterwards is a Shadow. Purified Gems weaken it mid-fight; the simulation does not use them.

Lobby CP

3,916

600

Timer

3:00

Attack

Defense

Difficulty

0.10

Pokebattler scale

Beating Shadow Shellder should take 1 trainer with level 40 counters. Caught CP 535-617.

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 Shadow Shellder counters are Regieleki, Mega Mewtwo Y, Shadow Thundurus (Therian), Thundurus (Therian), Kartana & Shadow Zapdos.

Suggested party of sixat most one Mega

Regieleki
M. Mewtwo Y
S. Thundurus (Therian)
Thundurus (Therian)
Kartana
S. Zapdos

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 %

1RegielekiLegendarypartyLock-On / Thunder Cage0.090:17
2Mega Mewtwo YMegaLegendarypartyPsycho Cut / Future Sight+0.100:17
3Mega Raichu YMegaThunder Shock / Wild Charge0.100:17
4Mega SceptileMegaBullet Seed / Frenzy Plant0.100:18
5Shadow Thundurus (Therian)ShadowLegendarypartyVolt Switch / Thunderbolt0.100:18
6Mega Mewtwo XMegaLegendaryPsycho Cut / Dynamic Punch+0.100:19
7Mega Raichu XMegaThunder Shock / Volt Tackle+0.110:19
8Thundurus (Therian)LegendarypartyVolt Switch / Wildbolt Storm0.110:20
9KartanaLegendarypartyRazor Leaf / Leaf Blade0.110:20
10Shadow ZapdosShadowLegendarypartyThunder Shock / Zap Cannon0.110:20

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 — Easy Shadow 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 Shadow Shellder 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	Regielekielectricjoint top pick	normalLock-OnelectricThunder Cage	2,803	0:17	0.09	2590.3%
2	Mega Mewtwo Ypsychicjoint top pick	psychicPsycho CutpsychicFuture Sight+	6,428	0:17	0.10	2540.2%
3	Mega Raichu Yelectric	electricThunder ShockelectricWild Charge	3,780	0:17	0.10	2527.2%
4	Mega Sceptilegrassdragon	grassBullet SeedgrassFrenzy Plant	4,056	0:18	0.10	2405.9%
5	Shadow Thundurus (Therian)electricflying	electricVolt SwitchelectricThunderbolt	3,659	0:18	0.10	2394.0%
6	Mega Mewtwo Xpsychicfighting	psychicPsycho CutfightingDynamic Punch+	6,112	0:19	0.10	2327.5%
7	Mega Raichu Xelectric	electricThunder ShockelectricVolt Tackle+	3,510	0:19	0.11	2294.2%
8	Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	0:20	0.11	2229.9%
9	Kartanagrasssteel	grassRazor LeafgrassLeaf Blade	3,677	0:20	0.11	2188.5%
10	Shadow Zapdoselectricflying	electricThunder ShockelectricZap Cannon	3,527	0:20	0.11	2177.5%
11	Zeraoraelectric	electricVolt SwitchelectricPlasma Fists	3,419	0:21	0.12	2073.0%
12	Shadow Sceptilegrass	bugFury CuttergrassFrenzy Plant	2,757	0:21	0.12	2060.2%
13	Shadow Chesnaughtgrassfighting	grassVine WhipgrassFrenzy Plant	2,954	0:22	0.12	2026.7%
14	Mega Chesnaughtgrassfighting	grassVine WhipgrassFrenzy Plant	4,093	0:22	0.12	2020.1%
15	Mega Manectricelectric	electricThunder FangelectricWild Charge	3,580	0:22	0.12	1989.7%

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 Shadow Shellder.

Estimator is how many trainers of this strength the fight needs. Power is the share of Shadow Shellder'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 % (1)	Overall	Power	Time to win	Estimator
Random (any moveset)showing	100%	492%	2352.2%	0:19	0.10
Tackle / Bubble Beam	100%	540%	2320.9%	0:19	0.10
Tackle / Water Pulse	100%	537%	2331.2%	0:19	0.10
Tackle / Icy Wind	100%	506%	2339.0%	0:19	0.10
Ice Shard / Water Pulse	100%	497%	2345.2%	0:19	0.10
Ice Shard / Bubble Beam	100%	506%	2346.9%	0:19	0.10
Tackle / Razor Shell	100%	479%	2346.9%	0:19	0.10
Ice Shard / Razor Shell	100%	457%	2366.4%	0:18	0.10
Ice Shard / Icy Wind	100%	502%	2370.8%	0:18	0.10

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…

Shellder 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 Shellder throws at you

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

Fast moves

Move	Power	Energy	Duration	Hits at
iceIce Shard	10	+10	1.0s	0.40s
normalTackle	5	+5	0.5s	0.30s

Charged moves

Move	Power	Energy	Duration	Hits at
waterRazor ShellSTAB	55	-33	1.5s	0.85s
waterBubble BeamSTAB	45	-33	2.0s	1.55s
waterWater PulseSTAB	65	-50	3.0s	2.00s
iceIcy Wind	65	-33	3.5s	2.20s

Catch CP

What the encounter after the fight can hand you.

IV spread	CP at L20	CP at L25 (weather boosted)
6/6/6floor	535	669
7/7/7	544	680
8/8/8	553	691
9/9/9	562	702
10/10/10	571	713
11/11/11	580	725
12/12/12	589	736
13/13/13	598	748
14/14/14	607	759
15/15/15hundo	617	771

Caught CP range 535 - 617, or 669 - 771 when the weather boosts it.

A raid encounter is level 20 (level 25 weather boosted) and cannot roll an IV below 6/6/6 — a Shadow raid's floor is 6, not the usual 10. Anything outside the first range is not this raid's reward.

Shadow raid floor. A Shadow Raid encounter rolls a minimum of 6/6/6, so this band starts at 535, not at the 571 a 10/10/10 catch would give. pokebattler.com's own page for a Shadow boss prints that 10/10/10 value as its floor — it is applying the standard-raid rule — so expect its range to start 36 CP higher than this one. LeekDuck's published band agrees with the table above.

When it is in raids

From the raid schedule, refreshed daily.

Shellder 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

Shadow Tier 1: 600 HP, 3:00 timer, boss Attack 78 / Defense 89 (15/15/15 at tier CPM 0.5974).

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	Regieleki top pickelectric Lock-On / Thunder Cage	Lock-On / Thunder Cage+11 more movesets	94%	2590.3%	0.09	0:17	0.0	100%	2,803	36.1	607
2	Mega Mewtwo Y top pickpsychicmega Psycho Cut / Future Sight+	Psycho Cut / Future Sight++26 more movesets	100%	2540.2%	0.10	0:17	0.0	100%	6,428	37.5	644
3	Mega Raichu Y electricmega Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+35 more movesets	89%	2527.2%	0.10	0:17	0.0	100%	3,780	35.4	611
4	Mega Sceptile grassdragonmega Bullet Seed / Frenzy Plant	Bullet Seed / Frenzy Plant+11 more movesets	87%	2405.9%	0.10	0:18	0.0	100%	4,056	34.2	619
5	Shadow Thundurus (Therian) electricflyingshadow Volt Switch / Thunderbolt	Volt Switch / Thunderbolt+9 more movesets	80%	2394.0%	0.10	0:18	0.0	100%	3,659	33.3	606
6	Mega Mewtwo X psychicfightingmega Psycho Cut / Dynamic Punch+	Psycho Cut / Dynamic Punch++26 more movesets	89%	2327.5%	0.10	0:19	0.0	100%	6,112	32.1	600
7	Mega Raichu X electricmega Thunder Shock / Volt Tackle+	Thunder Shock / Volt Tackle++35 more movesets	86%	2294.2%	0.11	0:19	0.0	100%	3,510	42.1	799
8	Thundurus (Therian) electricflying Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	78%	2229.9%	0.11	0:20	0.0	100%	3,659	33.2	648
9	Kartana grasssteel Razor Leaf / Leaf Blade	Razor Leaf / Leaf Blade+14 more movesets	78%	2188.5%	0.11	0:20	0.0	100%	3,677	31.2	621
10	Shadow Zapdos electricflyingshadow Thunder Shock / Zap Cannon	Thunder Shock / Zap Cannon+11 more movesets	75%	2177.5%	0.11	0:20	0.0	100%	3,527	31.1	622
11	Zeraora electric Volt Switch / Plasma Fists	Volt Switch / Plasma Fists+9 more movesets	74%	2073.0%	0.12	0:21	0.0	100%	3,419	30.8	647
12	Shadow Sceptile grassshadow Fury Cutter / Frenzy Plant	Fury Cutter / Frenzy Plant+11 more movesets	71%	2060.2%	0.12	0:21	0.0	100%	2,757	29.6	627
13	Shadow Chesnaught grassfightingshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+17 more movesets	72%	2026.7%	0.12	0:22	0.0	100%	2,954	28.1	605
14	Mega Chesnaught grassfightingmega Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+20 more movesets	78%	2020.1%	0.12	0:22	0.0	100%	4,093	28.1	606
15	Mega Manectric electricmega Thunder Fang / Wild Charge	Thunder Fang / Wild Charge+14 more movesets	69%	1989.7%	0.12	0:22	0.0	100%	3,580	29.2	641
16	Mega Ampharos electricdragonmega Volt Switch / Zap Cannon	Volt Switch / Zap Cannon+15 more movesets	73%	1984.2%	0.12	0:22	0.0	100%	4,245	28.3	622
17	Shadow Magnezone electricsteelshadow Volt Switch / Zap Cannon	Volt Switch / Zap Cannon+15 more movesets	69%	1981.5%	0.12	0:22	0.0	100%	3,205	28.0	616
18	Mega Venusaur grasspoisonmega Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	73%	1981.5%	0.12	0:22	0.0	100%	3,698	27.6	607
19	Shadow Venusaur grasspoisonshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	69%	1977.9%	0.12	0:22	0.0	100%	2,720	27.6	609
20	Shadow Electivire electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	67%	1970.8%	0.12	0:22	0.0	100%	3,079	32.6	722
21	Xurkitree electric Spark / Discharge	Spark / Discharge+7 more movesets	67%	1958.4%	0.12	0:22	0.0	100%	3,937	28.9	645
22	Mega Victreebel grasspoisonmega Magical Leaf / Acid Spray+	Magical Leaf / Acid Spray++23 more movesets	70%	1958.2%	0.12	0:22	0.0	100%	3,505	28.5	635
23	Shadow Manectric electricshadow Charge Beam / Wild Charge	Charge Beam / Wild Charge+14 more movesets	62%	1942.2%	0.13	0:22	0.0	100%	2,340	27.1	601
24	Shadow Mewtwo psychicshadow Psycho Cut / Thunderbolt	Psycho Cut / Thunderbolt+23 more movesets	67%	1931.5%	0.13	0:23	0.0	100%	4,178	27.4	618
25	Shadow Raikou electricshadow Thunder Shock / Thunderbolt	Thunder Shock / Thunderbolt+9 more movesets	67%	1921.3%	0.13	0:23	0.0	100%	3,452	27.9	632
26	Electivire electric Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	66%	1921.3%	0.13	0:23	0.0	100%	3,079	27.2	616
27	Deoxys psychic Charge Beam / Thunderbolt	Charge Beam / Thunderbolt+5 more movesets	59%	1912.3%	0.13	0:23	0.1	100%	3,160	26.7	588
28	Shadow Alolan Golem rockelectricshadow Volt Switch / Wild Charge	Volt Switch / Wild Charge+8 more movesets	62%	1893.7%	0.13	0:23	0.0	100%	2,949	27.5	632
29	Shadow Regigigas normalshadow Hidden Power / Crush Grip	Hidden Power / Crush Grip+7 more movesets	68%	1886.4%	0.13	0:23	0.0	100%	4,346	29.5	681
30	Mega Rayquaza dragonflyingmega Dragon Tail / Dragon Ascent	Dragon Tail / Dragon Ascent+11 more movesets	67%	1867.8%	0.13	0:23	0.0	100%	5,713	27.4	640

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 (its Shadow boss page; the ordinary boss's page is a different, easier fight). Boss-by-boss accuracy report.

Ranked 30 attackers in 0.2 s (50 Monte Carlo runs each, seed 1). Same boss on pokebattler.com. The same ranking as JSON: /api/raids/rank.