It resists 0.625x0.625x— bringing one of those is throwing damage away.
Catch CPboosted 1539–1692
What the encounter after the fight can hand you.
IV spread
CP at L20
CP at L25 (weather boosted)
6/6/6floor
1,231
1,539
7/7/7
1,245
1,556
8/8/8
1,258
1,573
9/9/9
1,271
1,590
10/10/10
1,285
1,606
11/11/11
1,299
1,623
12/12/12
1,312
1,641
13/13/13
1,326
1,658
14/14/14
1,340
1,675
15/15/15hundo
1,354
1,692
Caught CP range 1,231 - 1,354, or 1,539 - 1,692 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 1,231, not at the 1,285 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 54 CP higher than this one.
Boss moves7 moves
What Grumpig throws at you: its standard movepool, with the damage window a dodge has to beat.
Fast moves
Move
Power
Energy
Duration
Hits at
ExtrasensorySTAB
11
+11
1.0s
0.75s
PsywaveSTAB
4
+7
0.5s
0.30s
Charge Beam
7
+14
1.0s
0.75s
Charged moves
Move
Power
Energy
Duration
Hits at
PsychicSTAB
95
-50
3.0s
1.50s
Dynamic Punch
85
-50
2.5s
1.00s
Shadow Ball
100
-50
3.0s
2.40s
Mirror CoatSTAB
60
-50
2.5s
2.20s
Hardest movesetsby moveset
Simulating each boss moveset…
Raid details4,000 HP · 3:00
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
16,760
HP
4,000
Timer
3:00
Attack
141
Defense
154
Difficulty
1.18
Beating Shadow Grumpig should take 2 trainers with level 40 counters. Caught CP 1,231-1,354.
Grumpig 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.
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.
The chevron on the top 15 opens damage per move, breakpoints and the energy cycle. Every column (CP, faints, power, pokebattler.com's own rank) is under All settings.
1Mega HoundoomSnarl · Dark Pulse1.05Time to win: 3:04
2Mega BeedrillBug Bite † · Fell Stinger1.11Time to win: 3:14
Shadow Tier 3: 4,000 HP, 3:00 timer, boss Attack 141 / Defense 154 (15/15/15 at tier CPM 0.76).
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 Houndoom
mega
Snarl / Dark Pulse+
Snarl / Dark Pulse++17 more movesets
100%
127.4%
1.05
3:04
4.1
100%
3,842
22.2
900
2
Mega Beedrill
mega
Bug Bite / Fell Stinger+
Bug Bite / Fell Stinger++23 more movesets
83%
120.8%
1.11
3:14
9.6
100%
3,383
22.0
440
3
Necrozma (Dawn Wings)
Psycho Cut / Moongeist Beam
Psycho Cut / Moongeist Beam+14 more movesets
87%
114.3%
1.17
3:25
5.1
100%
4,099
20.4
946
4
Mega Gengar
mega
Lick / Shadow Ball
Lick / Shadow Ball+31 more movesets
78%
112.9%
1.18
3:28
9.1
100%
4,336
20.4
537
5
Shadow Darkrai
shadow
Snarl / Foul Play
Snarl / Foul Play+14 more movesets
80%
110.7%
1.21
3:32
6.6
100%
3,739
19.5
651
6
Mega Absol
mega
Snarl / Brutal Swing
Snarl / Brutal Swing+9 more movesets
76%
107.5%
1.24
3:38
8.0
100%
3,301
19.2
518
7
Mega Tyranitar
mega
Bite / Brutal Swing
Bite / Brutal Swing+15 more movesets
85%
106.5%
1.26
3:40
3.7
100%
5,347
18.4
1131
8
Shadow Hydreigon
shadow
Bite / Brutal Swing
Bite / Brutal Swing+9 more movesets
77%
104.6%
1.28
3:44
6.2
100%
3,625
18.3
692
9
Mega Mewtwo Y
mega
Psycho Cut / Shadow Ball
Psycho Cut / Shadow Ball+26 more movesets
80%
104.5%
1.28
3:45
4.6
100%
6,428
18.1
799
10
Shadow Tyranitar
shadow
Bite / Brutal Swing
Bite / Brutal Swing+15 more movesets
76%
103.9%
1.29
3:46
6.2
100%
3,834
18.1
733
11
Mega Mewtwo X
mega
Psycho Cut / Shadow Ball
Psycho Cut / Shadow Ball+26 more movesets
75%
101.4%
1.32
3:51
5.9
100%
6,112
17.8
615
12
Shadow Absol
shadow
Snarl / Brutal Swing
Snarl / Brutal Swing+9 more movesets
67%
99.5%
1.34
3:56
10.4
100%
2,526
17.9
411
13
Shadow Chandelure
shadow
Hex / Shadow Ball
Hex / Shadow Ball+19 more movesets
67%
98.4%
1.36
3:58
10.4
100%
3,268
17.7
393
14
Mega Heracross
mega
Fury Cutter / Megahorn
Fury Cutter / Megahorn+17 more movesets
67%
96.7%
1.38
4:03
9.0
100%
4,814
17.3
459
15
Mega Banette
mega
Shadow Claw / Shadow Ball
Shadow Claw / Shadow Ball+5 more movesets
65%
96.4%
1.39
4:03
10.8
100%
3,594
17.3
396
16
Darkrai
Snarl / Foul Play
Snarl / Foul Play+14 more movesets
70%
95.3%
1.40
4:06
6.1
100%
3,739
16.6
656
17
Mega Rayquaza
mega
Dragon Tail / Dragon Ascent
Dragon Tail / Dragon Ascent+11 more movesets
70%
94.8%
1.41
4:08
6.0
100%
5,713
16.7
588
18
Shadow Salamence
shadow
Bite / Brutal Swing
Bite / Brutal Swing+20 more movesets
64%
92.1%
1.45
4:15
9.1
100%
3,749
16.3
401
19
Mega Pinsir
mega
Bug Bite / X-Scissor
Bug Bite / X-Scissor+14 more movesets
65%
91.6%
1.46
4:16
7.7
100%
4,182
16.1
499
20
Mega Greninja
mega
Feint Attack / Surf+
Feint Attack / Surf++17 more movesets
65%
90.8%
1.47
4:19
7.6
100%
3,784
16.0
583
21
Blacephalon
Astonish / Shadow Ball
Astonish / Shadow Ball+7 more movesets
60%
90.5%
1.48
4:19
12.1
100%
3,297
16.4
342
22
Shadow Regigigas
shadow
Hidden Power / Crush Grip
Hidden Power / Crush Grip+7 more movesets
63%
88.8%
1.50
4:24
7.9
100%
4,346
15.7
505
23
Mega Salamence
mega
Bite / Brutal Swing
Bite / Brutal Swing+20 more movesets
65%
88.1%
1.52
4:26
5.9
100%
5,031
15.3
590
24
Shadow Mewtwo
shadow
Psycho Cut / Shadow Ball
Psycho Cut / Shadow Ball+23 more movesets
61%
88.0%
1.52
4:27
8.6
100%
4,178
15.7
473
25
Hydreigon
Bite / Brutal Swing
Bite / Brutal Swing+9 more movesets
65%
87.8%
1.52
4:27
5.8
100%
3,625
15.3
693
26
Shadow Giratina (Altered)
shadow
Shadow Claw / Shadow Force
Shadow Claw / Shadow Force+7 more movesets
64%
87.7%
1.52
4:28
6.6
100%
3,379
15.3
629
27
Shadow Scizor
shadow
Fury Cutter / X-Scissor
Fury Cutter / X-Scissor+7 more movesets
59%
87.4%
1.53
4:28
10.0
100%
3,001
15.5
372
28
Giratina (Origin)
Shadow Claw / Shadow Force
Shadow Claw / Shadow Force+7 more movesets
63%
87.2%
1.53
4:29
6.6
100%
3,683
15.3
621
29
Mega Alakazam
mega
Psycho Cut / Shadow Ball
Psycho Cut / Shadow Ball+17 more movesets
60%
86.5%
1.55
4:31
9.0
100%
4,510
15.4
451
30
Shadow Houndoom
shadow
Snarl / Foul Play
Snarl / Foul Play+14 more movesets
59%
86.1%
1.55
4:33
9.8
100%
2,635
15.3
426
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.
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+.
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.
CP 1231–1354
