Seviper counters

#0336

poisonTier 5

Lobby CP

29,802

15,000

Timer

5:00

Attack

166

Defense

105

Difficulty

0.97

Pokebattler scale

Beating Seviper should take 1 trainer with level 40 counters. Caught CP 1,137-1,203.

Weak toground1.6xpsychic1.6x

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 a Psychic Mega — most top counters attack with Psychic

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 Seviper counters are Mega Mewtwo Y, Shadow Mewtwo, Shadow Landorus (Therian), Mewtwo, Shadow Groudon & Shadow Regigigas.

Suggested party of sixat most one Mega

M. Mewtwo Y
S. Mewtwo
S. Landorus (Therian)
Mewtwo
S. Groudon
S. Regigigas

9 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 Mewtwo YMegaLegendarypartyPsycho Cut / Future Sight+0.703:13
2Mega Mewtwo XMegaLegendaryPsycho Cut / Psystrike0.863:57
3Shadow MewtwoShadowLegendarypartyPsycho Cut / Psystrike0.994:34
4Shadow Landorus (Therian)ShadowLegendarypartyMud Shot / Sandsear Storm1.084:58
5Primal GroudonMegaLegendaryMud Shot / Precipice Blades1.084:59
6Mega AlakazamMegaConfusion / Psychic1.095:02
7MewtwoLegendarypartyPsycho Cut / Psystrike1.175:23
8Mega GalladeMegaConfusion / Psychic1.185:27
9Mega GardevoirMegaConfusion / Psychic1.195:29
10Shadow GroudonShadowLegendarypartyMud Shot / Precipice Blades1.205:31
15Shadow RegigigasShadowLegendarypartyZen Headbutt / Crush Grip1.235:41

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 — Legendary 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 Seviper

Raid alerts…

Top 15 Seviper 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 Mewtwo Ypsychicjoint top pick	psychicPsycho CutpsychicFuture Sight+	6,428	3:13	0.70	3.9	157.7%
2	Mega Mewtwo Xpsychicfighting	psychicPsycho CutpsychicPsystrike	6,112	3:57	0.86	4.4	128.6%
3	Shadow Mewtwopsychic	psychicPsycho CutpsychicPsystrike	4,178	4:34	0.99	6.0	110.9%
4	Shadow Landorus (Therian)groundflying	groundMud ShotgroundSandsear Storm	3,922	4:58	1.08	5.8	102.2%
5	Primal Groudongroundfire	groundMud ShotgroundPrecipice Blades	5,902	4:59	1.08	4.2	101.6%
6	Mega Alakazampsychic	psychicConfusionpsychicPsychic	4,510	5:02	1.09	6.0	100.6%
7	Mewtwopsychic	psychicPsycho CutpsychicPsystrike	4,178	5:23	1.17	6.0	94.0%
8	Mega Galladepsychicfighting	psychicConfusionpsychicPsychic	4,521	5:27	1.18	6.0	93.1%
9	Mega Gardevoirpsychicfairy	psychicConfusionpsychicPsychic	4,512	5:29	1.19	6.0	92.3%
10	Shadow Groudonground	groundMud ShotgroundPrecipice Blades	4,115	5:31	1.20	5.5	91.9%
11	Mega Garchompdragonground	groundMud ShotgroundEarth Power	5,424	5:33	1.21	4.7	91.3%
12	Mega Latiosdragonpsychic	psychicZen HeadbuttpsychicPsychic	5,007	5:34	1.21	5.8	91.1%
13	Mega Delphoxfirepsychic	psychicZen HeadbuttpsychicPsychic	4,783	5:35	1.21	5.8	90.8%
14	Mega Malamardarkpsychic	psychicPsycho CutpsychicPsybeam+	3,143	5:38	1.22	5.8	89.9%
15	Shadow Regigigasnormal	psychicZen HeadbuttnormalCrush Grip	4,346	5:41	1.23	6.0	89.2%

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 Seviper.

Estimator is how many trainers of this strength the fight needs. Power is the share of Seviper'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	43%	190%	103.7%	4:53	5.6	1.06
Poison Jab / Crunch	42%	157%	102.5%	4:57	5.9	1.07
Iron Tail / Crunch	44%	156%	102.8%	4:56	5.9	1.07
Poison Jab / Wrap	42%	195%	103.3%	4:54	5.6	1.07
Iron Tail / Wrap	43%	194%	103.4%	4:54	5.6	1.07
Iron Tail / Poison Fang	40%	238%	104.7%	4:50	5.3	1.05
Poison Jab / Poison Fang	50%	242%	105.0%	4:50	5.0	1.05

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…

Seviper 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.

ground1.6x psychic1.6x normal1x flying1x rock1x ghost1x steel1x fire1x water1x electric1x ice1x dragon1x dark1x fighting0.63x poison0.63x bug0.63x grass0.63x fairy0.63x

Weak (2)
Neutral (11)
Resists (5)

It resists fighting0.625xpoison0.625xbug0.625xgrass0.625xfairy0.625x— bringing one of those is throwing damage away.

What Seviper throws at you

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

Fast moves

Move	Power	Energy	Duration	Hits at
poisonPoison JabSTAB	13	+9	1.0s	0.40s
steelIron Tail	14	+6	1.0s	0.75s

Charged moves

Move	Power	Energy	Duration	Hits at
poisonPoison FangSTAB	30	-33	1.5s	0.70s
darkCrunch	65	-33	3.0s	1.10s
normalWrap	60	-33	3.0s	2.15s

Catch CP

What the encounter after the fight can hand you.

IV spread	CP at L20	CP at L25 (weather boosted)
10/10/10floor	1,137	1,421
11/11/11	1,150	1,438
12/12/12	1,163	1,454
13/13/13	1,176	1,471
14/14/14	1,190	1,487
15/15/15hundo	1,203	1,504

Caught CP range 1,137 - 1,203, or 1,421 - 1,504 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.

Seviper 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 5: 15,000 HP, 5:00 timer, boss Attack 166 / Defense 105 (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 % (1)	CP	DPS	TDO
1	Mega Mewtwo Y psychicmega Psycho Cut / Future Sight+	Psycho Cut / Future Sight++26 more movesets	100%	157.7%	0.70	3:13	3.7	100%	6,428	79.1	3256
2	Mega Mewtwo X psychicfightingmega Psycho Cut / Psystrike	Psycho Cut / Psystrike+26 more movesets	81%	128.6%	0.86	3:57	4.2	100%	6,112	63.9	2812
3	Shadow Mewtwo psychicshadow Psycho Cut / Psystrike	Psycho Cut / Psystrike+23 more movesets	65%	110.9%	0.99	4:34	8.3	100%	4,178	56.9	1628
4	Shadow Landorus (Therian) groundflyingshadow Mud Shot / Sandsear Storm	Mud Shot / Sandsear Storm+9 more movesets	60%	102.2%	1.08	4:58	7.4	54%	3,922	52.0	1809
5	Primal Groudon groundfiremega Mud Shot / Precipice Blades	Mud Shot / Precipice Blades+9 more movesets	64%	101.6%	1.08	4:59	4.1	70%	5,902	50.5	2999
6	Mega Alakazam psychicmega Confusion / Psychic	Confusion / Psychic+17 more movesets	58%	100.6%	1.09	5:02	9.9	46%	4,510	51.8	1404
7	Mewtwo psychic Psycho Cut / Psystrike	Psycho Cut / Psystrike+23 more movesets	55%	94.0%	1.17	5:23	8.6	0%	4,178	48.2	1589
8	Mega Gallade psychicfightingmega Confusion / Psychic	Confusion / Psychic+19 more movesets	55%	93.1%	1.18	5:27	7.4	0%	4,521	47.3	1733
9	Mega Gardevoir psychicfairymega Confusion / Psychic	Confusion / Psychic+19 more movesets	53%	92.3%	1.19	5:29	9.4	0%	4,512	46.9	1404
10	Shadow Groudon groundshadow Mud Shot / Precipice Blades	Mud Shot / Precipice Blades+9 more movesets	55%	91.9%	1.20	5:31	6.7	0%	4,115	46.3	1963
11	Mega Garchomp dragongroundmega Mud Shot / Earth Power	Mud Shot / Earth Power+13 more movesets	56%	91.3%	1.21	5:33	5.0	0%	5,424	46.1	2548
12	Mega Latios dragonpsychicmega Zen Headbutt / Psychic	Zen Headbutt / Psychic+9 more movesets	54%	91.1%	1.21	5:34	7.5	0%	5,007	46.4	1810
13	Mega Delphox firepsychicmega Zen Headbutt / Psychic	Zen Headbutt / Psychic+23 more movesets	54%	90.8%	1.21	5:35	7.6	0%	4,783	46.2	1813
14	Mega Malamar darkpsychicmega Psycho Cut / Psybeam+	Psycho Cut / Psybeam++14 more movesets	54%	89.9%	1.22	5:38	6.7	0%	3,143	45.7	1915
15	Shadow Regigigas normalshadow Zen Headbutt / Crush Grip	Zen Headbutt / Crush Grip+7 more movesets	53%	89.2%	1.23	5:41	7.8	0%	4,346	45.4	1669
16	Hoopa (Unbound) psychicdark Confusion / Psychic	Confusion / Psychic+5 more movesets	51%	87.9%	1.25	5:46	9.2	0%	4,006	44.7	1437
17	Shadow Latios dragonpsychicshadow Zen Headbutt / Psychic	Zen Headbutt / Psychic+9 more movesets	50%	87.0%	1.27	5:49	10.5	0%	3,812	44.6	1319
18	Shadow Excadrill groundsteelshadow Mud-Slap / Scorching Sands	Mud-Slap / Scorching Sands+14 more movesets	52%	87.0%	1.27	5:50	6.9	0%	3,244	44.0	2239
19	Shadow Alakazam psychicshadow Confusion / Psychic	Confusion / Psychic+17 more movesets	47%	86.8%	1.27	5:51	15.7	0%	3,057	45.5	914
20	Landorus (Therian) groundflying Extrasensory / Sandsear Storm	Extrasensory / Sandsear Storm+9 more movesets	50%	85.5%	1.29	5:56	7.5	0%	3,922	43.3	1801
21	Shadow Metagross steelpsychicshadow Zen Headbutt / Psychic	Zen Headbutt / Psychic+15 more movesets	50%	85.1%	1.29	5:57	7.5	0%	3,791	43.0	2226
22	Shadow Garchomp dragongroundshadow Mud Shot / Earth Power	Mud Shot / Earth Power+13 more movesets	50%	85.1%	1.29	5:57	7.3	0%	3,962	42.9	1841
23	Mega Metagross steelpsychicmega Zen Headbutt / Psychic	Zen Headbutt / Psychic+15 more movesets	52%	84.8%	1.30	5:59	5.1	0%	4,911	42.4	3000
24	Shadow Mamoswine icegroundshadow Mud-Slap / High Horsepower	Mud-Slap / High Horsepower+11 more movesets	48%	83.9%	1.31	6:02	9.9	0%	3,328	42.9	1417
25	Mega Rayquaza dragonflyingmega Dragon Tail / Dragon Ascent	Dragon Tail / Dragon Ascent+11 more movesets	50%	83.2%	1.32	6:06	6.9	0%	5,713	42.2	1862
26	Shadow Rhyperior groundrockshadow Mud-Slap / Earthquake	Mud-Slap / Earthquake+15 more movesets	50%	82.6%	1.33	6:08	6.3	0%	3,733	41.5	2262
27	Shadow Landorus (Incarnate) groundflyingshadow Mud Shot / Earth Power	Mud Shot / Earth Power+7 more movesets	48%	82.5%	1.34	6:09	9.1	0%	3,588	42.0	1519
28	Necrozma (Dusk Mane) psychicsteel Psycho Cut / Sunsteel Strike	Psycho Cut / Sunsteel Strike+14 more movesets	50%	82.1%	1.34	6:10	6.1	0%	4,099	41.3	2542
29	Mega Starmie waterpsychicmega Psywave / Liquidation+	Psywave / Liquidation++44 more movesets	47%	81.3%	1.35	6:14	10.2	0%	3,701	41.6	1388
30	Mega Latias dragonpsychicmega Zen Headbutt / Psychic	Zen Headbutt / Psychic+14 more movesets	48%	80.7%	1.36	6:17	7.3	0%	4,801	40.8	1845

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