Shellder counters

#0090

waterElite

Lobby CP

22,614

20,000

Timer

5:00

Attack

129

Defense

146

Difficulty

1.97

Pokebattler scale

Beating Shellder should take 2 trainers with level 40 counters. Caught CP 571-617.

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 Shellder counters are Mega Raichu Y, Shadow Thundurus (Therian), Regieleki, Shadow Electivire, Shadow Raikou & Kartana.

Suggested party of sixat most one Mega

M. Raichu Y
S. Thundurus (Therian)
Regieleki
S. Electivire
S. Raikou
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+1.707:49
2Mega Raichu XMegaThunder Shock / Volt Tackle+1.898:41
3Mega ChesnaughtMegaVine Whip / Seed Bomb+1.999:10
4Shadow Thundurus (Therian)ShadowLegendarypartyVolt Switch / Wildbolt Storm2.029:18
5Mega Mewtwo YMegaLegendaryPsycho Cut / Future Sight+2.099:37
6Mega SceptileMegaFury Cutter / Frenzy Plant2.139:49
7RegielekiLegendarypartyLock-On / Thunder Cage2.1810:02
8Mega Mewtwo XMegaLegendaryPsycho Cut / Dynamic Punch+2.2510:22
9Shadow ElectivireShadowpartyThunder Shock / Wild Charge2.3310:43
10Shadow RaikouShadowLegendarypartyThunder Shock / Wild Charge2.3310:44
11KartanaLegendarypartyRazor Leaf / Leaf Blade2.3310:45

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.

Search bosses

Type a name, then Enter or click a result

Raid tier — Elite 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 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.

Trainers2duo

#	Attacker	Moveset
1	Mega Raichu Yelectricjoint top pick	electricThunder ShockelectricZap Cannon+	3,780	7:49	1.70	6.0	64.9%
2	Mega Raichu Xelectric	electricThunder ShockelectricVolt Tackle+	3,510	8:41	1.89	6.0	58.3%
3	Mega Chesnaughtgrassfighting	grassVine WhipgrassSeed Bomb+	4,093	9:10	1.99	3.9	55.3%
4	Shadow Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	9:18	2.02	6.0	54.5%
5	Mega Mewtwo Ypsychic	psychicPsycho CutpsychicFuture Sight+	6,428	9:37	2.09	4.8	52.7%
6	Mega Sceptilegrassdragon	bugFury CuttergrassFrenzy Plant	4,056	9:49	2.13	4.9	51.7%
7	Regielekielectric	normalLock-OnelectricThunder Cage	2,803	10:02	2.18	6.0	50.5%
8	Mega Mewtwo Xpsychicfighting	psychicPsycho CutfightingDynamic Punch+	6,112	10:22	2.25	4.9	48.9%
9	Shadow Electivireelectric	electricThunder ShockelectricWild Charge	3,079	10:43	2.33	6.0	47.3%
10	Shadow Raikouelectric	electricThunder ShockelectricWild Charge	3,452	10:44	2.33	6.0	47.2%
11	Kartanagrasssteel	grassRazor LeafgrassLeaf Blade	3,677	10:45	2.33	5.9	47.2%
12	Zeraoraelectric	electricVolt SwitchelectricPlasma Fists	3,419	10:50	2.35	5.9	46.8%
13	Xurkitreeelectric	electricThunder ShockelectricDischarge	3,937	10:53	2.36	6.0	46.6%
14	Mega Manectricelectric	electricThunder FangelectricWild Charge	3,580	10:57	2.38	6.0	46.3%
15	Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	10:57	2.38	6.0	46.3%

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 Shellder.

Estimator is how many trainers of this strength the fight needs. Power is the share of 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.

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 % (2)	Overall	Power	Time to win	Faints	Estimator
Random (any moveset)showing	36%	82%	51.2%	9:54	6.0	2.15
Tackle / Razor Shell	35%	74%	50.6%	10:01	6.0	2.18
Ice Shard / Razor Shell	38%	74%	50.9%	9:58	6.0	2.17
Ice Shard / Icy Wind	35%	86%	51.0%	9:56	6.0	2.16
Tackle / Bubble Beam	43%	93%	51.4%	9:52	5.9	2.14
Ice Shard / Water Pulse	40%	81%	51.4%	9:51	6.0	2.14
Tackle / Icy Wind	44%	89%	51.4%	9:51	6.0	2.14
Ice Shard / Bubble Beam	47%	90%	51.5%	9:51	6.0	2.14
Tackle / Water Pulse	46%	83%	51.6%	9:49	6.0	2.13

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 2 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)
10/10/10floor	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 571 - 617, or 713 - 771 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.

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

Elite: 20,000 HP, 5:00 timer, boss Attack 129 / Defense 146 (15/15/15 at tier CPM 0.985).

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 % (2)	CP	DPS	TDO
1	Mega Raichu Y electricmega Thunder Shock / Zap Cannon+	Thunder Shock / Zap Cannon++35 more movesets	100%	64.9%	1.70	7:49	13.6	100%	3,780	44.5	1352
2	Mega Raichu X electricmega Thunder Shock / Volt Tackle+	Thunder Shock / Volt Tackle++35 more movesets	91%	58.3%	1.89	8:41	12.2	100%	3,510	39.7	1488
3	Mega Chesnaught grassfightingmega Vine Whip / Seed Bomb+	Vine Whip / Seed Bomb++20 more movesets	91%	55.3%	1.99	9:10	7.1	100%	4,093	37.0	2531
4	Shadow Thundurus (Therian) electricflyingshadow Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	81%	54.5%	2.02	9:18	18.6	96%	3,659	37.5	1003
5	Mega Mewtwo Y psychicmega Psycho Cut / Future Sight+	Psycho Cut / Future Sight++26 more movesets	85%	52.7%	2.09	9:37	9.2	100%	6,428	35.4	1937
6	Mega Sceptile grassdragonmega Fury Cutter / Frenzy Plant	Fury Cutter / Frenzy Plant+11 more movesets	80%	51.7%	2.13	9:49	13.7	76%	4,056	35.1	1705
7	Regieleki electric Lock-On / Thunder Cage	Lock-On / Thunder Cage+11 more movesets	75%	50.5%	2.18	10:02	18.2	54%	2,803	34.6	1025
8	Mega Mewtwo X psychicfightingmega Psycho Cut / Dynamic Punch+	Psycho Cut / Dynamic Punch++26 more movesets	78%	48.9%	2.25	10:22	10.1	0%	6,112	32.8	1776
9	Shadow Electivire electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	70%	47.3%	2.33	10:43	19.4	0%	3,079	32.4	960
10	Shadow Raikou electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	72%	47.2%	2.33	10:44	15.0	0%	3,452	32.0	1220
11	Kartana grasssteel Razor Leaf / Leaf Blade	Razor Leaf / Leaf Blade+14 more movesets	72%	47.2%	2.33	10:45	14.3	0%	3,677	31.9	1276
12	Zeraora electric Volt Switch / Plasma Fists	Volt Switch / Plasma Fists+9 more movesets	72%	46.8%	2.35	10:50	14.4	0%	3,419	31.7	1275
13	Xurkitree electric Thunder Shock / Discharge	Thunder Shock / Discharge+7 more movesets	70%	46.6%	2.36	10:53	17.7	0%	3,937	31.7	1047
14	Mega Manectric electricmega Thunder Fang / Wild Charge	Thunder Fang / Wild Charge+14 more movesets	70%	46.3%	2.38	10:57	16.8	0%	3,580	31.5	1101
15	Thundurus (Therian) electricflying Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	69%	46.3%	2.38	10:57	19.1	0%	3,659	31.7	975
16	Shadow Magnezone electricsteelshadow Volt Switch / Wild Charge	Volt Switch / Wild Charge+15 more movesets	69%	45.3%	2.43	11:11	16.0	0%	3,205	30.7	1216
17	Zekrom dragonelectric Charge Beam / Fusion Bolt	Charge Beam / Fusion Bolt+9 more movesets	71%	45.2%	2.44	11:13	11.0	0%	4,038	30.3	1692
18	Shadow Sceptile grassshadow Fury Cutter / Frenzy Plant	Fury Cutter / Frenzy Plant+11 more movesets	67%	44.8%	2.46	11:19	18.5	0%	2,757	30.6	1052
19	Mega Rayquaza dragonflyingmega Dragon Tail / Dragon Ascent	Dragon Tail / Dragon Ascent+11 more movesets	69%	44.8%	2.46	11:20	12.8	0%	5,713	30.2	1621
20	Shadow Chesnaught grassfightingshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+17 more movesets	69%	44.7%	2.47	11:21	14.1	0%	2,954	30.2	1349
21	Shadow Zapdos electricflyingshadow Thunder Shock / Thunderbolt	Thunder Shock / Thunderbolt+11 more movesets	66%	44.4%	2.48	11:25	18.9	0%	3,527	30.3	983
22	Shadow Luxray electricshadow Spark / Wild Charge	Spark / Wild Charge+14 more movesets	64%	43.4%	2.54	11:41	20.9	0%	2,888	29.7	893
23	Shaymin (Sky) grassflying Magical Leaf / Grass Knot	Magical Leaf / Grass Knot+11 more movesets	65%	43.3%	2.55	11:43	16.1	0%	3,592	29.3	1278
24	Shadow Regigigas normalshadow Hidden Power / Crush Grip	Hidden Power / Crush Grip+7 more movesets	66%	43.0%	2.56	11:48	14.8	0%	4,346	29.1	1238
25	Shadow Tangrowth grassshadow Vine Whip / Power Whip	Vine Whip / Power Whip+9 more movesets	66%	42.8%	2.57	11:51	14.4	0%	3,030	28.9	1313
26	Mega Venusaur grasspoisonmega Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	67%	42.7%	2.58	11:52	11.3	0%	3,698	28.6	1660
27	Shadow Venusaur grasspoisonshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	64%	42.2%	2.61	12:00	16.7	0%	2,720	28.6	1148
28	Shadow Vikavolt bugelectricshadow Volt Switch / Discharge	Volt Switch / Discharge+15 more movesets	61%	42.0%	2.62	12:04	22.2	0%	3,117	28.8	845
29	Eternatus poisondragon Poison Jab / Dynamax Cannon	Poison Jab / Dynamax Cannon+7 more movesets	66%	41.6%	2.65	12:11	10.4	0%	4,429	27.8	1791
30	Mega Ampharos electricdragonmega Volt Switch / Zap Cannon	Volt Switch / Zap Cannon+15 more movesets	65%	41.5%	2.65	12:13	12.2	0%	4,245	28.0	1547

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