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
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
View matchup
737.444
82.8%
Standard error 2.35 points
▾
+1 252+ Atk Zacian-Crowned Iron Head vs. 252 HP / 0 Def Arceus-Fairy: 408-482 (91.8 - 108.5%) -- 56.3% chance to OHKO
02
Necrozma-Dusk-Mane
PsychicSteel
OFFENSIVE CHECK
View matchup
712.755
71.9%
Standard error 2.86 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus-Fairy: 246-290 (55.4 - 65.3%) -- guaranteed 2HKO
03
Eternatus
PoisonDragon
OFFENSIVE CHECK
View matchup
521.663
66.6%
Standard error 3.49 points
▾
252+ SpA Eternatus Sludge Bomb vs. 252 HP / 252+ SpD Arceus-Fairy: 222-264 (50 - 59.4%) -- guaranteed 2HKO
04
Kyogre
Water
DEFENSIVE CHECK
View matchup
1,157.044
61.5%
Standard error 2.44 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Kyogre: 117-138 (28.9 - 34.1%) -- 2.1% chance to 3HKO
05
Calyrex-Ice
PsychicIce
DEFENSIVE CHECK
View matchup
335.247
61.3%
Standard error 4.55 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Calyrex-Ice: 123-145 (30.4 - 35.8%) -- 45.3% chance to 3HKO
06
Arceus-Ground
Ground
DEFENSIVE CHECK
View matchup
245.747
63.8%
Standard error 5.24 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Arceus-Ground: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
07
Arceus-Electric
Electric
DEFENSIVE CHECK
View matchup
148.298
68.1%
Standard error 6.49 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Arceus-Electric: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
08
Clodsire
PoisonGround
DEFENSIVE CHECK
View matchup
132.44
68.7%
Standard error 6.90 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Clodsire: 73-87 (15.7 - 18.7%) -- possible 6HKO
09
Lunala
PsychicGhost
SOFT CHECK
View matchup
507.703
53.4%
Standard error 3.78 points
▾
+1 252+ SpA Lunala Meteor Beam vs. 252 HP / 252+ SpD Arceus-Fairy: 142-168 (31.9 - 37.8%) -- 93.9% chance to 3HKO
10
Blissey
Normal
DEFENSIVE CHECK
View matchup
161.286
63.8%
Standard error 6.51 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Blissey: 118-141 (16.5 - 19.7%) -- possible 6HKO
11
Ho-Oh
FireFlying
SOFT CHECK
View matchup
1,063.841
47.5%
Standard error 2.62 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Arceus-Fairy: 184-217 (41.4 - 48.8%) -- guaranteed 3HKO
12
Arceus
Normal
SOFT CHECK
View matchup
363.65
51.7%
Standard error 4.51 points
▾
252+ Atk Silk Scarf Arceus Double-Edge vs. 252 HP / 0 Def Arceus-Fairy: 210-247 (47.2 - 55.6%) -- 76.2% chance to 2HKO
13
Koraidon
FightingDragon
SOFT CHECK
View matchup
2,070.627
40.9%
Standard error 1.86 points
▾
252+ Atk Orichalcum Pulse Koraidon Flare Blitz vs. 252 HP / 0 Def Arceus-Fairy in Sun: 253-298 (56.9 - 67.1%) -- guaranteed 2HKO
14
Arceus-Ghost
Ghost
DEFENSIVE CHECK
View matchup
85.646
59.1%
Standard error 7.37 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Arceus-Ghost: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
15
Arceus-Fairy
Fairy
SOFT CHECK
View matchup
316.001
47.4%
Standard error 4.78 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Arceus-Fairy: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
16
Arceus-Water
Water
SOFT CHECK
View matchup
200.558
51.9%
Standard error 6.04 points
▾
252+ SpA Splash Plate Arceus-Water Judgment vs. 252 HP / 252+ SpD Arceus-Fairy: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
17
Ursaluna
GroundNormal
OFFENSIVE CHECK
View matchup
69.995
57.0%
Standard error 8.19 points
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Arceus-Fairy: 195-229 (43.9 - 51.5%) -- 8.6% chance to 2HKO
18
Kingambit
DarkSteel
SOFT CHECK
View matchup
137.075
51.3%
Standard error 7.23 points
▾
252+ Atk Kingambit Iron Head vs. 252 HP / 0 Def Arceus-Fairy: 254-300 (57.2 - 67.5%) -- guaranteed 2HKO
19
Wo-Chien
DarkGrass
DEFENSIVE CHECK
View matchup
31.745
55.1%
Standard error 8.83 points
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Wo-Chien: 236-282 (63.1 - 75.4%) -- guaranteed 2HKO
20
Terapagos
Normal
SOFT CHECK
View matchup
123.704
49.6%
Standard error 7.73 points
▾
0- SpA Terapagos Tera Starstorm vs. 252 HP / 252+ SpD Arceus-Fairy: 52-63 (11.7 - 14.1%) -- possible 8HKO
21
Deoxys-Attack
Psychic
SOFT CHECK
View matchup
120.421
47.3%
Standard error 7.73 points
▾
252+ SpA Deoxys-Attack Psycho Boost vs. 252 HP / 252+ SpD Arceus-Fairy: 204-241 (45.9 - 54.2%) -- 54.3% chance to 2HKO
22
Glimmora
RockPoison
SOFT CHECK
View matchup
54.477
52.7%
Standard error 9.29 points
▾
0- SpA Glimmora Sludge Bomb vs. 252 HP / 252+ SpD Arceus-Fairy: 140-168 (31.5 - 37.8%) -- 89% chance to 3HKO
23
Garganacl
Rock
SOFT CHECK
View matchup
77.869
44.1%
Standard error 7.82 points
▾
252+ Atk Garganacl Earthquake vs. 252 HP / 0 Def Arceus-Fairy: 85-101 (19.1 - 22.7%) -- possible 5HKO
24
Amoonguss
GrassPoison
SOFT CHECK
22.413
51.2%
Standard error 10.56 points
25
Flutter Mane
GhostFairy
SOFT CHECK
View matchup
67.708
50.8%
Standard error 10.46 points
▾
252+ SpA Choice Specs Flutter Mane Moonblast vs. 252 HP / 252+ SpD Arceus-Fairy: 168-198 (37.8 - 44.5%) -- guaranteed 3HKO
26
Skeledirge
FireGhost
SOFT CHECK
View matchup
67.839
39.8%
Standard error 8.35 points
▾
252+ SpA Skeledirge Torch Song vs. 252 HP / 252+ SpD Arceus-Fairy: 82-97 (18.4 - 21.8%) -- possible 5HKO
27
Hatterene
PsychicFairy
SOFT CHECK
View matchup
265.786
20.7%
Standard error 4.24 points
▾
252+ SpA Hatterene Misty Explosion vs. 252 HP / 252+ SpD Arceus-Fairy: 118-141 (26.5 - 31.7%) -- guaranteed 4HKO
28
Giratina-Origin
GhostDragon
SOFT CHECK
View matchup
310.463
15.5%
Standard error 3.51 points
▾
252+ Atk Griseous Core Giratina-Origin Poltergeist vs. 252 HP / 0 Def Arceus-Fairy: 192-226 (43.2 - 50.9%) -- 3.1% chance to 2HKO
29
Gliscor
GroundFlying
SOFT CHECK
View matchup
220.415
18.7%
Standard error 4.49 points
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Arceus-Fairy: 124-147 (27.9 - 33.1%) -- guaranteed 4HKO
30
Ditto
Normal
SOFT CHECK
View matchup
95.066
31.0%
Standard error 8.13 points
▾
Ditto vs. Arceus-Fairy: 0-0 (0 - 0%)
Ranked #11 with 15.90% usage. Sorted by conservative score.