Shellos counters

#0422

waterTier 3

Lobby CP

7,755

3,600

Timer

3:00

Attack

Defense

Difficulty

0.33

Pokebattler scale

Beating Shellos should take 1 trainer with level 40 counters. Caught CP 600-649.

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

Suggested party of sixat most one Mega

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

6 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 YMegapartyVolt Switch / Zap Cannon+0.310:54
2Mega Raichu XMegaThunder Shock / Volt Tackle+0.310:54
3Shadow Thundurus (Therian)ShadowLegendarypartyVolt Switch / Wildbolt Storm0.330:57
4Mega SceptileMegaFury Cutter / Frenzy Plant0.340:59
5Mega ChesnaughtMegaVine Whip / Seed Bomb+0.341:00
6Mega Mewtwo YMegaLegendaryConfusion / Future Sight+0.351:02
7RegielekiLegendarypartyLock-On / Thunder Cage0.351:02
8Mega Mewtwo XMegaLegendaryPsycho Cut / Dynamic Punch+0.361:03
9Thundurus (Therian)LegendarypartyVolt Switch / Wildbolt Storm0.381:07
10KartanaLegendarypartyRazor Leaf / Leaf Blade0.381:07
12Shadow RaikouShadowLegendarypartyThunder Shock / Wild Charge0.391:09

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 — 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

Related countersShadow Shellos

Raid alerts…

Top 15 Shellos 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	electricVolt SwitchelectricZap Cannon+	3,780	0:54	0.31	1.1	437.5%
2	Mega Raichu Xelectricjoint top pick	electricThunder ShockelectricVolt Tackle+	3,510	0:54	0.31	0.7	434.4%
3	Shadow Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	0:57	0.33	0.6	410.5%
4	Mega Sceptilegrassdragon	bugFury CuttergrassFrenzy Plant	4,056	0:59	0.34	0.1	396.9%
5	Mega Chesnaughtgrassfighting	grassVine WhipgrassSeed Bomb+	4,093	1:00	0.34	0.0	391.2%
6	Mega Mewtwo Ypsychic	psychicConfusionpsychicFuture Sight+	6,428	1:02	0.35	0.0	378.1%
7	Regielekielectric	normalLock-OnelectricThunder Cage	2,803	1:02	0.35	1.2	376.8%
8	Mega Mewtwo Xpsychicfighting	psychicPsycho CutfightingDynamic Punch+	6,112	1:03	0.36	0.0	370.8%
9	Thundurus (Therian)electricflying	electricVolt SwitchelectricWildbolt Storm	3,659	1:07	0.38	0.5	349.6%
10	Kartanagrasssteel	grassRazor LeafgrassLeaf Blade	3,677	1:07	0.38	0.8	348.1%
11	Mega Manectricelectric	electricThunder FangelectricWild Charge	3,580	1:09	0.39	1.1	342.3%
12	Shadow Raikouelectric	electricThunder ShockelectricWild Charge	3,452	1:09	0.39	0.9	340.6%
13	Xurkitreeelectric	electricThunder ShockelectricDischarge	3,937	1:09	0.39	1.2	339.9%
14	Shadow Electivireelectric	electricThunder ShockelectricWild Charge	3,079	1:09	0.39	1.3	339.8%
15	Shadow Zapdoselectricflying	electricThunder ShockelectricThunderbolt	3,527	1:10	0.40	0.6	336.2%

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 Shellos.

Estimator is how many trainers of this strength the fight needs. Power is the share of Shellos'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	Faints	Estimator
Random (any moveset)showing	100%	309%	373.5%	1:03	0.8	0.36
Mud-Slap / Body Slam	100%	319%	370.5%	1:03	0.9	0.36
Hidden Power / Water Pulse	100%	313%	371.3%	1:03	0.9	0.36
Hidden Power / Body Slam	100%	350%	373.8%	1:03	0.7	0.36
Mud-Slap / Water Pulse	100%	293%	374.1%	1:03	1.0	0.36
Hidden Power / Mud Bomb	100%	320%	376.7%	1:02	0.7	0.35
Mud-Slap / Mud Bomb	100%	311%	378.9%	1:02	0.8	0.35

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…

Shellos 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 Shellos throws at you

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

Fast moves

Move	Power	Energy	Duration	Hits at
groundMud-Slap	19	+13	1.5s	1.25s
normalHidden Power	15	+15	1.5s	1.10s

Charged moves

Move	Power	Energy	Duration	Hits at
waterWater PulseSTAB	65	-50	3.0s	2.00s
normalBody Slam	50	-33	2.0s	1.30s
groundMud Bomb	60	-33	2.5s	1.90s

Catch CP

What the encounter after the fight can hand you.

IV spread	CP at L20	CP at L25 (weather boosted)
10/10/10floor	600	751
11/11/11	610	762
12/12/12	619	774
13/13/13	629	787
14/14/14	639	799
15/15/15hundo	649	811

Caught CP range 600 - 649, or 751 - 811 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.

Shellos 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 86 / Defense 87 (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 top pickelectricmega Volt Switch / Zap Cannon+	Volt Switch / Zap Cannon++35 more movesets	94%	437.5%	0.31	0:54	1.0	100%	3,780	69.9	1862
2	Mega Raichu X top pickelectricmega Thunder Shock / Volt Tackle+	Thunder Shock / Volt Tackle++35 more movesets	96%	434.4%	0.31	0:54	0.7	100%	3,510	67.2	2281
3	Shadow Thundurus (Therian) electricflyingshadow Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	92%	410.5%	0.33	0:57	0.5	100%	3,659	63.7	2585
4	Mega Sceptile grassdragonmega Fury Cutter / Frenzy Plant	Fury Cutter / Frenzy Plant+11 more movesets	94%	396.9%	0.34	0:59	0.1	100%	4,056	61.6	3423
5	Mega Chesnaught grassfightingmega Vine Whip / Seed Bomb+	Vine Whip / Seed Bomb++20 more movesets	100%	391.2%	0.34	0:60	0.0	100%	4,093	60.0	3600
6	Mega Mewtwo Y psychicmega Confusion / Future Sight+	Confusion / Future Sight++26 more movesets	90%	378.1%	0.35	1:02	0.0	100%	6,428	59.0	3659
7	Regieleki electric Lock-On / Thunder Cage	Lock-On / Thunder Cage+11 more movesets	79%	376.8%	0.35	1:02	1.1	100%	2,803	60.3	1799
8	Mega Mewtwo X psychicfightingmega Psycho Cut / Dynamic Punch+	Psycho Cut / Dynamic Punch++26 more movesets	88%	370.8%	0.36	1:03	0.0	100%	6,112	57.3	3553
9	Thundurus (Therian) electricflying Volt Switch / Wildbolt Storm	Volt Switch / Wildbolt Storm+9 more movesets	78%	349.6%	0.38	1:07	0.5	100%	3,659	54.0	2643
10	Kartana grasssteel Razor Leaf / Leaf Blade	Razor Leaf / Leaf Blade+14 more movesets	77%	348.1%	0.38	1:07	0.7	100%	3,677	54.2	2263
11	Mega Manectric electricmega Thunder Fang / Wild Charge	Thunder Fang / Wild Charge+14 more movesets	72%	342.3%	0.39	1:09	1.0	100%	3,580	53.1	1782
12	Shadow Raikou electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	73%	340.6%	0.39	1:09	0.9	100%	3,452	53.8	1962
13	Xurkitree electric Thunder Shock / Discharge	Thunder Shock / Discharge+7 more movesets	71%	339.9%	0.39	1:09	1.1	100%	3,937	52.7	1710
14	Shadow Electivire electricshadow Thunder Shock / Wild Charge	Thunder Shock / Wild Charge+9 more movesets	69%	339.8%	0.39	1:09	1.2	100%	3,079	54.6	1691
15	Shadow Zapdos electricflyingshadow Thunder Shock / Thunderbolt	Thunder Shock / Thunderbolt+11 more movesets	75%	336.2%	0.40	1:10	0.5	100%	3,527	51.7	2524
16	Zeraora electric Volt Switch / Plasma Fists	Volt Switch / Plasma Fists+9 more movesets	72%	333.1%	0.40	1:10	0.8	100%	3,419	54.2	2137
17	Shadow Sceptile grassshadow Fury Cutter / Frenzy Plant	Fury Cutter / Frenzy Plant+11 more movesets	72%	328.0%	0.41	1:12	0.9	100%	2,757	51.4	1947
18	Mega Rayquaza dragonflyingmega Dragon Tail / Dragon Ascent	Dragon Tail / Dragon Ascent+11 more movesets	81%	327.5%	0.41	1:12	0.0	100%	5,713	51.6	3694
19	Shadow Magnezone electricsteelshadow Charge Beam / Wild Charge	Charge Beam / Wild Charge+15 more movesets	65%	321.7%	0.42	1:13	1.4	100%	3,205	50.0	1777
20	Shaymin (Sky) grassflying Magical Leaf / Grass Knot	Magical Leaf / Grass Knot+11 more movesets	77%	321.2%	0.42	1:13	0.1	100%	3,592	49.5	3398
21	Shadow Regigigas normalshadow Hidden Power / Crush Grip	Hidden Power / Crush Grip+7 more movesets	71%	321.0%	0.42	1:13	0.7	100%	4,346	50.2	2341
22	Zekrom dragonelectric Charge Beam / Fusion Bolt	Charge Beam / Fusion Bolt+9 more movesets	71%	316.7%	0.42	1:14	0.5	100%	4,038	52.0	2840
23	Shadow Luxray electricshadow Spark / Wild Charge	Spark / Wild Charge+14 more movesets	63%	313.6%	0.43	1:15	1.3	100%	2,888	49.7	1572
24	Shadow Chesnaught grassfightingshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+17 more movesets	72%	313.0%	0.43	1:15	0.3	100%	2,954	50.1	3241
25	Shadow Vikavolt bugelectricshadow Volt Switch / Discharge	Volt Switch / Discharge+15 more movesets	64%	310.9%	0.43	1:15	1.0	100%	3,117	49.3	1811
26	Shadow Tangrowth grassshadow Vine Whip / Power Whip	Vine Whip / Power Whip+9 more movesets	71%	310.1%	0.43	1:16	0.3	100%	3,030	47.9	3112
27	Shadow Venusaur grasspoisonshadow Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	67%	309.3%	0.43	1:16	0.9	100%	2,720	48.9	1892
28	Mega Venusaur grasspoisonmega Vine Whip / Frenzy Plant	Vine Whip / Frenzy Plant+9 more movesets	72%	309.2%	0.43	1:16	0.2	100%	3,698	49.4	3355
29	Shadow Manectric electricshadow Thunder Fang / Wild Charge	Thunder Fang / Wild Charge+14 more movesets	59%	307.9%	0.43	1:16	2.0	100%	2,340	47.8	1187
30	Shadow Mewtwo psychicshadow Psycho Cut / Thunderbolt	Psycho Cut / Thunderbolt+23 more movesets	66%	307.8%	0.43	1:16	0.9	100%	4,178	47.4	1916

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