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
Calyrex-Ice
PsychicIce
DEFENSIVE CHECK
View matchup
247.167
77.3%
Standard error 4.44 points
▾
252+ Atk Arceus-Ground Stone Edge vs. 252 HP / 252+ Def Calyrex-Ice: 124-146 (30.6 - 36.1%) -- 47.7% chance to 3HKO
02
Calyrex-Shadow
PsychicGhost
OFFENSIVE CHECK
View matchup
1,096.921
64.2%
Standard error 2.42 points
▾
252+ SpA Calyrex-Shadow Grass Knot (120 BP) vs. 252 HP / 252+ SpD Arceus-Ground: 218-258 (49 - 58.1%) -- 97.7% chance to 2HKO
03
Kyogre
Water
DEFENSIVE CHECK
View matchup
197.32
67.6%
Standard error 5.65 points
▾
252+ Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 252+ Def Kyogre: 157-186 (38.8 - 46%) -- guaranteed 3HKO
04
Wo-Chien
DarkGrass
DEFENSIVE CHECK
View matchup
143.099
68.2%
Standard error 6.63 points
▾
252+ Atk Arceus-Ground Stone Edge vs. 252 HP / 252+ Def Tablets of Ruin Wo-Chien: 62-73 (16.5 - 19.5%) -- possible 8HKO
05
Koraidon
FightingDragon
SOFT CHECK
View matchup
1,038.309
50.6%
Standard error 2.61 points
▾
252+ Atk Orichalcum Pulse Koraidon Flare Blitz vs. 252 HP / 0 Def Arceus-Ground in Sun: 253-298 (56.9 - 67.1%) -- guaranteed 2HKO
06
Arceus-Water
Water
DEFENSIVE CHECK
View matchup
68.143
70.6%
Standard error 7.68 points
▾
252+ Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 252+ Def Arceus-Water: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
07
Arceus
Normal
SOFT CHECK
View matchup
718.948
52.2%
Standard error 3.11 points
▾
252+ Atk Silk Scarf Arceus Extreme Speed vs. 252 HP / 0 Def Arceus-Ground: 139-165 (31.3 - 37.1%) -- 79% chance to 3HKO
08
Arceus-Ground
Ground
SOFT CHECK
View matchup
421.727
48.9%
Standard error 4.00 points
▾
252+ Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 0 Def Arceus-Ground: 174-205 (39.1 - 46.1%) -- guaranteed 3HKO
09
Kyurem-White
DragonIce
OFFENSIVE CHECK
22.332
69.9%
Standard error 9.70 points
10
Kyurem-Black
DragonIce
OFFENSIVE CHECK
View matchup
61.515
64.9%
Standard error 8.60 points
▾
252+ Atk Kyurem-Black Icicle Spear (3 hits) vs. 252 HP / 0 Def Arceus-Ground: 288-342 (64.8 - 77%) -- guaranteed 2HKO
11
Grafaiai
PoisonNormal
OFFENSIVE CHECK
View matchup
44.58
59.0%
Standard error 7.37 points
▾
252+ Atk Grafaiai Low Kick (120 BP) vs. 252 HP / 0 Def Arceus-Ground: 99-117 (22.2 - 26.3%) -- 12.6% chance to 4HKO
12
Ting-Lu
DarkGround
SOFT CHECK
View matchup
332.565
45.2%
Standard error 4.52 points
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Arceus-Ground: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
13
Ditto
Normal
SOFT CHECK
View matchup
344.83
40.8%
Standard error 4.38 points
▾
Ditto vs. Arceus-Ground: 0-0 (0 - 0%)
14
Miraidon
ElectricDragon
SOFT CHECK
View matchup
1,231.725
30.5%
Standard error 2.24 points
▾
252+ SpA Hadron Engine Miraidon Draco Meteor vs. 252 HP / 252+ SpD Arceus-Ground: 204-240 (45.9 - 54%) -- 48.4% chance to 2HKO
15
Chien-Pao
DarkIce
SOFT CHECK
View matchup
71.172
51.1%
Standard error 8.33 points
▾
252+ Atk Sword of Ruin Chien-Pao Icicle Crash vs. 252 HP / 0 Def Arceus-Ground: 330-390 (74.3 - 87.8%) -- guaranteed 2HKO
16
Arceus-Fairy
Fairy
SOFT CHECK
View matchup
182.993
42.4%
Standard error 6.25 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
17
Corviknight
FlyingSteel
SOFT CHECK
View matchup
220.923
39.1%
Standard error 5.46 points
▾
252+ Atk Corviknight Brave Bird vs. 252 HP / 0 Def Arceus-Ground: 141-166 (31.7 - 37.3%) -- 87.1% chance to 3HKO
18
Zacian-Crowned
FairySteel
SOFT CHECK
View matchup
249.982
36.5%
Standard error 5.04 points
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 0 Def Arceus-Ground: 229-271 (51.5 - 61%) -- guaranteed 2HKO
19
Ho-Oh
FireFlying
SOFT CHECK
View matchup
909.507
24.4%
Standard error 2.42 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Arceus-Ground: 184-217 (41.4 - 48.8%) -- guaranteed 3HKO
20
Dondozo
Water
SOFT CHECK
View matchup
61.476
49.4%
Standard error 8.98 points
▾
252+ Atk Dondozo Wave Crash vs. 252 HP / 0 Def Arceus-Ground: 306-362 (68.9 - 81.5%) -- guaranteed 2HKO
21
Smeargle
Normal
SOFT CHECK
View matchup
480.341
25.3%
Standard error 3.39 points
▾
22
Gliscor
GroundFlying
SOFT CHECK
View matchup
342.959
27.7%
Standard error 4.10 points
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Arceus-Ground: 124-147 (27.9 - 33.1%) -- guaranteed 4HKO
23
Flutter Mane
GhostFairy
SOFT CHECK
View matchup
152.348
35.3%
Standard error 6.59 points
▾
252+ SpA Flutter Mane Moonblast vs. 252 HP / 252+ SpD Arceus-Ground: 111-132 (25 - 29.7%) -- guaranteed 4HKO
24
Kingambit
DarkSteel
SOFT CHECK
View matchup
209.252
26.3%
Standard error 5.23 points
▾
252+ Atk Black Glasses Kingambit Kowtow Cleave vs. 252 HP / 0 Def Arceus-Ground: 160-190 (36 - 42.7%) -- guaranteed 3HKO
25
Necrozma-Dusk-Mane
PsychicSteel
SOFT CHECK
View matchup
145.824
29.2%
Standard error 6.30 points
▾
252+ Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus-Ground: 178-210 (40 - 47.2%) -- guaranteed 3HKO
26
Skeledirge
FireGhost
SOFT CHECK
View matchup
202.405
21.4%
Standard error 4.53 points
▾
252+ SpA Skeledirge Torch Song vs. 252 HP / 252+ SpD Arceus-Ground: 82-97 (18.4 - 21.8%) -- possible 5HKO
27
Glimmora
RockPoison
SOFT CHECK
View matchup
328.454
15.3%
Standard error 3.31 points
▾
0- SpA Glimmora Power Gem vs. 252 HP / 252+ SpD Arceus-Ground: 31-37 (6.9 - 8.3%)
28
Sneasler
FightingPoison
SOFT CHECK
View matchup
50.069
38.8%
Standard error 9.64 points
▾
252+ Atk Sneasler Close Combat vs. 252 HP / 0 Def Arceus-Ground: 184-217 (41.4 - 48.8%) -- guaranteed 3HKO
29
Ribombee
BugFairy
SOFT CHECK
View matchup
177.531
18.2%
Standard error 4.68 points
▾
252+ SpA Ribombee Moonblast vs. 252 HP / 252+ SpD Arceus-Ground: 88-105 (19.8 - 23.6%) -- possible 5HKO
30
Drifblim
GhostFlying
SOFT CHECK
View matchup
57.202
33.8%
Standard error 8.75 points
▾
252+ SpA Drifblim Shadow Ball vs. 252 HP / 252+ SpD Arceus-Ground: 72-85 (16.2 - 19.1%) -- possible 6HKO
Ranked #7 with 19.58% usage. Sorted by conservative score.