Observed target KO or switch rate is upstream p: the fraction of relevant encounters where the target was knocked out or switched out. Standard error is upstream d. The conservative score is p − 4d. These ladder observations do not prove a set-specific counter.
How to read this table
Use encounter count and standard error to judge the sample. Damage estimates below use inferred sets and remain separate from the observed ladder metric.
#
Checker
Encounters
Conservative score
Target KO or switch rate
01
Arceus-Dark
Dark
DEFENSIVE CHECK
View matchup
53.914
78.2%
Standard error 5.62 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus-Dark: 123-145 (27.7 - 32.6%) -- guaranteed 4HKO
02
Skarmory
SteelFlying
DEFENSIVE CHECK
View matchup
99.83
81.3%
Standard error 6.65 points
▾
252+ SpA Necrozma-Dusk-Mane Photon Geyser vs. 252 HP / 252+ SpD Skarmory: 73-87 (21.8 - 26%) -- 3.7% chance to 4HKO
03
Lunala
PsychicGhost
OFFENSIVE CHECK
View matchup
1,030.12
63.9%
Standard error 2.59 points
▾
252+ SpA Lunala Moongeist Beam vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 190-225 (47.7 - 56.5%) -- 85.9% chance to 2HKO
04
Kingambit
DarkSteel
DEFENSIVE CHECK
View matchup
339.46
68.0%
Standard error 4.37 points
▾
0- Atk Necrozma-Dusk-Mane Earthquake vs. 252 HP / 0 Def Kingambit: 164-194 (40.5 - 48%) -- guaranteed 3HKO
05
Kyogre
Water
SOFT CHECK
View matchup
1,743.192
53.7%
Standard error 2.06 points
▾
252+ SpA Choice Specs Kyogre Water Spout (150 BP) vs. 252 HP / 252+ SpD Necrozma-Dusk-Mane in Rain: 456-537 (114.5 - 134.9%) -- guaranteed OHKO
06
Arceus-Ground
Ground
DEFENSIVE CHECK
View matchup
432.725
60.7%
Standard error 4.05 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus-Ground: 123-145 (27.7 - 32.6%) -- guaranteed 4HKO
07
Arceus
Normal
DEFENSIVE CHECK
View matchup
980.652
55.4%
Standard error 2.75 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus: 123-145 (27.7 - 32.6%) -- guaranteed 4HKO
08
Corviknight
FlyingSteel
DEFENSIVE CHECK
View matchup
87.882
74.8%
Standard error 7.78 points
▾
0- Atk Necrozma-Dusk-Mane Knock Off (97.5 BP) vs. 252 HP / 0 Def Corviknight: 90-106 (22.5 - 26.5%) -- 16.9% chance to 4HKO
09
Giratina-Origin
GhostDragon
DEFENSIVE CHECK
View matchup
428.667
59.5%
Standard error 4.07 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Giratina-Origin: 144-171 (28.5 - 33.9%) -- 0.8% chance to 3HKO
10
Arceus-Water
Water
DEFENSIVE CHECK
View matchup
393.413
59.0%
Standard error 4.28 points
▾
252+ SpA Necrozma-Dusk-Mane Photon Geyser vs. 252 HP / 252+ SpD Arceus-Water: 103-123 (23.1 - 27.7%) -- 73.7% chance to 4HKO
11
Necrozma-Dusk-Mane
PsychicSteel
SOFT CHECK
View matchup
1,508.303
49.0%
Standard error 2.23 points
▾
0- Atk Necrozma-Dusk-Mane Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 118-139 (29.6 - 34.9%) -- 13.7% chance to 3HKO
12
Chi-Yu
DarkFire
OFFENSIVE CHECK
View matchup
24.891
73.8%
Standard error 8.81 points
▾
252+ SpA Beads of Ruin Chi-Yu Overheat vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 325-384 (81.6 - 96.4%) -- guaranteed 2HKO
13
Koraidon
FightingDragon
SOFT CHECK
View matchup
2,284.701
45.1%
Standard error 1.80 points
▾
252+ Atk Orichalcum Pulse Koraidon Flare Blitz vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane in Sun: 360-424 (90.4 - 106.5%) -- 43.8% chance to OHKO
14
Ursaluna
GroundNormal
OFFENSIVE CHECK
View matchup
134.85
60.8%
Standard error 5.78 points
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 279-328 (70.1 - 82.4%) -- guaranteed 2HKO
15
Arceus-Ghost
Ghost
DEFENSIVE CHECK
View matchup
220.703
60.3%
Standard error 5.68 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus-Ghost: 123-145 (27.7 - 32.6%) -- guaranteed 4HKO
16
Calyrex-Ice
PsychicIce
SOFT CHECK
View matchup
765.338
49.4%
Standard error 3.12 points
▾
252+ Atk Calyrex-Ice High Horsepower vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 166-196 (41.7 - 49.2%) -- guaranteed 3HKO
17
Groudon
Ground
DEFENSIVE CHECK
View matchup
289.33
56.9%
Standard error 5.00 points
▾
252+ SpA Necrozma-Dusk-Mane Photon Geyser vs. 252 HP / 252+ SpD Groudon: 127-150 (31.4 - 37.1%) -- guaranteed 4HKO after Leftovers recovery
18
Wo-Chien
DarkGrass
DEFENSIVE CHECK
View matchup
27.672
71.2%
Standard error 8.61 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Tablets of Ruin Wo-Chien: 109-129 (29.1 - 34.4%) -- 4.2% chance to 3HKO
19
Arceus-Electric
Electric
SOFT CHECK
View matchup
264.329
54.5%
Standard error 5.27 points
▾
252+ SpA Zap Plate Arceus-Electric Judgment vs. 252 HP / 252+ SpD Necrozma-Dusk-Mane: 138-163 (34.6 - 40.9%) -- guaranteed 3HKO
20
Ho-Oh
FireFlying
SOFT CHECK
View matchup
1,469.99
41.8%
Standard error 2.22 points
▾
252+ Atk Ho-Oh Flare Blitz vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 262-310 (65.8 - 77.8%) -- guaranteed 2HKO
21
Ting-Lu
DarkGround
SOFT CHECK
View matchup
216.308
51.1%
Standard error 5.86 points
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 195-231 (48.9 - 58%) -- 96.1% chance to 2HKO
22
Skeledirge
FireGhost
SOFT CHECK
View matchup
270.3
48.4%
Standard error 5.22 points
▾
252+ SpA Skeledirge Torch Song vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 130-154 (32.6 - 38.6%) -- 99.3% chance to 3HKO
23
Zacian-Crowned
FairySteel
SOFT CHECK
View matchup
1,709.066
34.2%
Standard error 1.98 points
▾
+1 252+ Atk Zacian-Crowned Crunch vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 195-231 (48.9 - 58%) -- 96.1% chance to 2HKO
24
Mewtwo
Psychic
OFFENSIVE CHECK
View matchup
30.612
58.5%
Standard error 8.91 points
▾
252+ SpA Life Orb Mewtwo Fire Blast vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 199-234 (50 - 58.7%) -- guaranteed 2HKO
25
Dondozo
Water
SOFT CHECK
View matchup
178.076
43.2%
Standard error 6.05 points
▾
252+ Atk Dondozo Liquidation vs. 252 HP / 0 Def Necrozma-Dusk-Mane: 103-123 (25.8 - 30.9%) -- guaranteed 4HKO
26
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
431.627
32.4%
Standard error 3.88 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 238-280 (59.7 - 70.3%) -- guaranteed 2HKO
27
Eternatus
PoisonDragon
SOFT CHECK
View matchup
810.573
27.2%
Standard error 2.70 points
▾
252+ SpA Eternatus Fire Blast vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 145-172 (36.4 - 43.2%) -- guaranteed 3HKO
28
Deoxys-Attack
Psychic
SOFT CHECK
View matchup
224.473
38.0%
Standard error 5.56 points
▾
0- Atk Deoxys-Attack Knock Off (97.5 BP) vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 129-153 (32.4 - 38.4%) -- 97.1% chance to 3HKO
29
Chien-Pao
DarkIce
SOFT CHECK
View matchup
56.254
52.7%
Standard error 9.39 points
▾
252+ Atk Life Orb Sword of Ruin Chien-Pao Crunch vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 289-341 (72.6 - 85.6%) -- guaranteed 2HKO
30
Arceus-Fairy
Fairy
SOFT CHECK
View matchup
712.755
21.7%
Standard error 2.59 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Necrozma-Dusk-Mane: 69-81 (17.3 - 20.3%) -- possible 5HKO
Ranked #4 with 34.54% usage. Sorted by conservative score.