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.
Beating Shadow Slowbro should take 1 trainer with level 40 counters. Caught CP 1,327-1,454.
Weak tobug1.6xghost1.6xgrass1.6xelectric1.6xdark1.6x
Improve your raidweather · friendship · Mega in the lobby · Party Power · Adventure EffectsShow ▾Hide ▴
Weather
★ boosts a type this boss is weak toFriendship
every trainer in the lobby who is your friendMega in the lobby
a Mega boosts every trainer's attacks: 1.3x of its own type, 1.1x of othersParty Power
Party Play: the charged move after a full meter does 2xAdventure Effects
only these three change a raidOf 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 40The best Shadow Slowbro counters are Mega Raichu Y, Necrozma (Dawn Wings), Shadow Thundurus (Therian), Shadow Darkrai, Shadow Giratina (Origin) & Shadow Hydreigon.
M. Raichu Y
Necrozma (Dawn Wings)
S. Thundurus (Therian)
S. Darkrai
S. Giratina (Origin)
S. Hydreigon
10 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+0.962:48
- 2
Mega HoundoomMegaSnarl / Dark Pulse+1.053:04 - 3
Mega BeedrillMegaBug Bite / Fell Stinger+1.053:04 - 4Necrozma (Dawn Wings)LegendarypartyShadow Claw / Moongeist Beam1.063:07
- 5
Mega Raichu XMegaThunder Shock / Volt Tackle+1.073:08 - 6
Mega SceptileMegaFury Cutter / Frenzy Plant1.113:15 - 7
Mega ChesnaughtMegaVine Whip / Seed Bomb+1.123:17 - 8
Mega GengarMegaLick / Shadow Ball1.143:20 - 9Shadow Thundurus (Therian)ShadowLegendarypartyVolt Switch / Wildbolt Storm1.143:21
- 10Shadow DarkraiShadowLegendarypartySnarl / Foul Play1.183:27
- 15Shadow Giratina (Origin)ShadowLegendarypartyShadow Claw / Shadow Force1.253:39
- 16Shadow HydreigonShadowpartyBite / Brutal Swing1.253:39
More orders under All settings (Sort by). The top 15 in detail.
Type a name, then Enter or click a result
Top 15 Shadow Slowbro 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.
| # | Attacker | Moveset | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Mega Raichu Yelectricjoint top pick | electricThunder ShockelectricZap Cannon+ | 3,780 | 2:48 | 0.96 | 5.8 | 139.4% | |
| 2 | Mega Houndoomdarkfire | darkSnarldarkDark Pulse+ | 3,842 | 3:04 | 1.05 | 5.0 | 127.7% | |
| 3 | Mega Beedrillbugpoison | bugBug BitebugFell Stinger+ | 3,383 | 3:04 | 1.05 | 5.5 | 127.4% | |
| 4 | Necrozma (Dawn Wings)psychicghost | ghostShadow ClawghostMoongeist Beam | 4,099 | 3:07 | 1.06 | 3.9 | 125.6% | |
| 5 | Mega Raichu Xelectric | electricThunder ShockelectricVolt Tackle+ | 3,510 | 3:08 | 1.07 | 5.7 | 124.7% | |
| 6 | Mega Sceptilegrassdragon | bugFury CuttergrassFrenzy Plant | 4,056 | 3:15 | 1.11 | 4.7 | 120.1% | |
| 7 | Mega Chesnaughtgrassfighting | grassVine WhipgrassSeed Bomb+ | 4,093 | 3:17 | 1.12 | 4.0 | 118.8% | |
| 8 | Mega Gengarghostpoison | ghostLickghostShadow Ball | 4,336 | 3:20 | 1.14 | 5.4 | 117.2% | |
| 9 | Shadow Thundurus (Therian)electricflying | electricVolt SwitchelectricWildbolt Storm | 3,659 | 3:21 | 1.14 | 5.7 | 117.0% | |
| 10 | Shadow Darkraidark | darkSnarldarkFoul Play | 3,739 | 3:27 | 1.18 | 5.6 | 113.5% | |
| 11 |  Mega Mewtwo Ypsychic | psychicPsycho CutghostShadow Ball | 6,428 | 3:33 | 1.21 | 3.6 | 110.1% | |
| 12 |  Mega Heracrossbugfighting | bugFury CutterbugMegahorn | 4,814 | 3:36 | 1.23 | 5.1 | 108.9% | |
| 13 |  Mega Tyranitarrockdark | darkBitedarkBrutal Swing | 5,347 | 3:37 | 1.24 | 4.3 | 108.2% | |
| 14 |  Mega Absoldark | darkSnarldarkBrutal Swing | 3,301 | 3:37 | 1.24 | 5.9 | 107.9% | |
| 15 | Shadow Giratina (Origin)ghostdragon | ghostShadow ClawghostShadow Force | 3,683 | 3:39 | 1.25 | 4.1 | 107.1% |
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 Slowbro.
Estimator is how many trainers of this strength the fight needs. Power is the share of Shadow Slowbro'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.
Simulating each boss moveset…
Slowbro 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.
- Weak (5)
- Neutral (7)
- Resists (6)
It resists fighting0.625xsteel0.625xfire0.625xwater0.625xpsychic0.625xice0.625x— bringing one of those is throwing damage away.
What Slowbro throws at you
Its standard movepool, with the damage window a dodge has to beat.
Fast moves
| Move | Power | Energy | Duration | Hits at |
|---|---|---|---|---|
| psychicConfusionSTAB | 19 | +14 | 1.5s | 0.50s |
| waterWater GunSTAB | 5 | +5 | 0.5s | 0.30s |
Charged moves
| Move | Power | Energy | Duration | Hits at |
|---|---|---|---|---|
| psychicPsychicSTAB | 95 | -50 | 3.0s | 1.50s |
| iceIce Beam | 95 | -50 | 3.5s | 1.50s |
| waterWater PulseSTAB | 65 | -50 | 3.0s | 2.00s |
| waterScaldSTAB | 75 | -50 | 3.5s | 1.10s |
| fightingDrain Punch | 50 | -33 | 2.5s | 1.10s |
Catch CP
What the encounter after the fight can hand you.
| IV spread | CP at L20 | CP at L25 (weather boosted) |
|---|---|---|
| 6/6/6floor | 1,327 | 1,659 |
| 7/7/7 | 1,340 | 1,676 |
| 8/8/8 | 1,354 | 1,693 |
| 9/9/9 | 1,368 | 1,711 |
| 10/10/10 | 1,382 | 1,728 |
| 11/11/11 | 1,397 | 1,746 |
| 12/12/12 | 1,411 | 1,764 |
| 13/13/13 | 1,425 | 1,782 |
| 14/14/14 | 1,439 | 1,799 |
| 15/15/15hundo | 1,454 | 1,817 |
Caught CP range 1,327 - 1,454, or 1,659 - 1,817 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 1,327, not at the 1,382 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 55 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.
Slowbro 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 3: 4,000 HP, 3:00 timer, boss Attack 145 / Defense 148 (15/15/15 at tier CPM 0.76).
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% | 139.4% | 0.96 | 2:48 | 6.9 | 82% | 3,780 | 25.4 | 527 |
| 2 | Mega Houndoom darkfiremega Snarl / Dark Pulse+ | Snarl / Dark Pulse++17 more movesets | 94% | 127.7% | 1.05 | 3:04 | 6.1 | 44% | 3,842 | 22.7 | 640 |
| 3 | Mega Beedrill bugpoisonmega Bug Bite / Fell Stinger+ | Bug Bite / Fell Stinger++23 more movesets | 88% | 127.4% | 1.05 | 3:04 | 8.6 | 56% | 3,383 | 23.2 | 499 |
| 4 | Necrozma (Dawn Wings) psychicghost Shadow Claw / Moongeist Beam | Shadow Claw / Moongeist Beam+14 more movesets | 99% | 125.6% | 1.06 | 3:07 | 3.9 | 22% | 4,099 | 21.9 | 984 |
| 5 | Mega Raichu X electricmega Thunder Shock / Volt Tackle+ | Thunder Shock / Volt Tackle++35 more movesets | 91% | 124.7% | 1.07 | 3:08 | 6.4 | 16% | 3,510 | 22.3 | 549 |
| 6 | Mega Sceptile grassdragonmega Fury Cutter / Frenzy Plant | Fury Cutter / Frenzy Plant+11 more movesets | 86% | 120.1% | 1.11 | 3:15 | 6.8 | 2% | 4,056 | 21.3 | 666 |
| 7 | Mega Chesnaught grassfightingmega Vine Whip / Seed Bomb+ | Vine Whip / Seed Bomb++20 more movesets | 91% | 118.8% | 1.12 | 3:17 | 4.7 | 0% | 4,093 | 20.8 | 795 |
| 8 | Mega Gengar ghostpoisonmega Lick / Shadow Ball | Lick / Shadow Ball+31 more movesets | 83% | 117.2% | 1.14 | 3:20 | 7.7 | 2% | 4,336 | 21.0 | 545 |
| 9 | Shadow Thundurus (Therian) electricflyingshadow Volt Switch / Wildbolt Storm | Volt Switch / Wildbolt Storm+9 more movesets | 81% | 117.0% | 1.14 | 3:21 | 8.7 | 6% | 3,659 | 21.1 | 452 |
| 10 | Shadow Darkrai darkshadow Snarl / Foul Play | Snarl / Foul Play+14 more movesets | 81% | 113.5% | 1.18 | 3:27 | 7.1 | 0% | 3,739 | 20.1 | 508 |
| 11 | Mega Mewtwo Y psychicmega Psycho Cut / Shadow Ball | Psycho Cut / Shadow Ball+26 more movesets | 86% | 110.1% | 1.21 | 3:33 | 4.1 | 0% | 6,428 | 18.9 | 823 |
| 12 | Mega Heracross bugfightingmega Fury Cutter / Megahorn | Fury Cutter / Megahorn+17 more movesets | 78% | 108.9% | 1.23 | 3:36 | 7.0 | 0% | 4,814 | 19.4 | 568 |
| 13 | Mega Tyranitar rockdarkmega Bite / Brutal Swing | Bite / Brutal Swing+15 more movesets | 82% | 108.2% | 1.24 | 3:37 | 4.9 | 0% | 5,347 | 18.9 | 744 |
| 14 | Mega Absol darkmega Snarl / Brutal Swing | Snarl / Brutal Swing+9 more movesets | 73% | 107.9% | 1.24 | 3:37 | 9.6 | 0% | 3,301 | 19.4 | 392 |
| 15 | Shadow Giratina (Origin) ghostdragonshadow Shadow Claw / Shadow Force | Shadow Claw / Shadow Force+7 more movesets | 80% | 107.1% | 1.25 | 3:39 | 5.4 | 0% | 3,683 | 18.7 | 729 |
| 16 | Shadow Hydreigon darkdragonshadow Bite / Brutal Swing | Bite / Brutal Swing+9 more movesets | 78% | 107.0% | 1.25 | 3:39 | 6.3 | 0% | 3,625 | 18.7 | 602 |
| 17 | Shadow Tyranitar rockdarkshadow Bite / Brutal Swing | Bite / Brutal Swing+15 more movesets | 76% | 107.0% | 1.25 | 3:39 | 7.4 | 0% | 3,834 | 18.9 | 513 |
| 18 | Mega Mewtwo X psychicfightingmega Psycho Cut / Shadow Ball | Psycho Cut / Shadow Ball+26 more movesets | 80% | 105.8% | 1.26 | 3:42 | 5.0 | 0% | 6,112 | 18.5 | 707 |
| 19 | Regieleki electric Thunder Shock / Thunder Cage | Thunder Shock / Thunder Cage+11 more movesets | 72% | 105.7% | 1.26 | 3:42 | 9.8 | 0% | 2,803 | 19.3 | 385 |
| 20 | Kartana grasssteel Fury Cutter / Leaf Blade | Fury Cutter / Leaf Blade+14 more movesets | 72% | 103.5% | 1.29 | 3:47 | 8.1 | 0% | 3,677 | 18.4 | 447 |
| 21 | Shadow Chandelure ghostfireshadow Hex / Shadow Ball | Hex / Shadow Ball+19 more movesets | 69% | 103.2% | 1.30 | 3:47 | 10.4 | 0% | 3,268 | 18.6 | 404 |
| 22 | Zeraora electric Volt Switch / Plasma Fists | Volt Switch / Plasma Fists+9 more movesets | 73% | 102.1% | 1.31 | 3:50 | 7.2 | 0% | 3,419 | 18.1 | 493 |
| 23 | Shadow Absol darkshadow Snarl / Brutal Swing | Snarl / Brutal Swing+9 more movesets | 67% | 101.7% | 1.31 | 3:51 | 11.9 | 0% | 2,526 | 18.6 | 317 |
| 24 | Xurkitree electric Thunder Shock / Discharge | Thunder Shock / Discharge+7 more movesets | 70% | 101.7% | 1.31 | 3:51 | 9.2 | 0% | 3,937 | 18.2 | 397 |
| 25 | Shadow Raikou electricshadow Thunder Shock / Wild Charge | Thunder Shock / Wild Charge+9 more movesets | 71% | 101.7% | 1.31 | 3:51 | 7.9 | 0% | 3,452 | 18.1 | 457 |
| 26 | Mega Banette ghostmega Shadow Claw / Shadow Ball | Shadow Claw / Shadow Ball+5 more movesets | 69% | 100.9% | 1.32 | 3:53 | 9.3 | 0% | 3,594 | 18.0 | 444 |
| 27 | Shadow Electivire electricshadow Thunder Shock / Wild Charge | Thunder Shock / Wild Charge+9 more movesets | 67% | 100.3% | 1.33 | 3:54 | 10.6 | 0% | 3,079 | 18.1 | 352 |
| 28 | Mega Rayquaza dragonflyingmega Dragon Tail / Dragon Ascent | Dragon Tail / Dragon Ascent+11 more movesets | 72% | 99.4% | 1.34 | 3:56 | 6.2 | 0% | 5,713 | 17.4 | 691 |
| 29 | Shadow Sceptile grassshadow Fury Cutter / Frenzy Plant | Fury Cutter / Frenzy Plant+11 more movesets | 67% | 98.8% | 1.35 | 3:58 | 9.8 | 0% | 2,757 | 17.8 | 397 |
| 30 | Thundurus (Therian) electricflying Volt Switch / Wildbolt Storm | Volt Switch / Wildbolt Storm+9 more movesets | 67% | 97.7% | 1.37 | 4:00 | 9.2 | 0% | 3,659 | 17.5 | 429 |
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%.
- 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 0.6 s (50 Monte Carlo runs each, seed 1). Same boss on pokebattler.com. The same ranking as JSON: /api/raids/rank.