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
344.871
69.7%
Standard error 4.25 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
Kyogre
Water
DEFENSIVE CHECK
View matchup
757.222
63.5%
Standard error 3.03 points
▾
252+ Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 252+ Def Kyogre: 157-186 (38.8 - 46%) -- guaranteed 3HKO
03
Arceus-Water
Water
DEFENSIVE CHECK
View matchup
159.378
67.5%
Standard error 6.31 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
04
Koraidon
FightingDragon
SOFT CHECK
View matchup
1,092.894
51.4%
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
05
Kyurem-Black
DragonIce
OFFENSIVE CHECK
View matchup
27.946
73.8%
Standard error 8.31 points
▾
252+ Atk Kyurem-Black Icicle Spear (3 hits) vs. 252 HP / 0 Def Arceus-Ground: 288-342 (64.8 - 77%) -- guaranteed 2HKO
06
Arceus
Normal
DEFENSIVE CHECK
View matchup
359.046
58.4%
Standard error 4.50 points
▾
252+ Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 252+ Def Arceus: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
07
Giratina-Origin
GhostDragon
DEFENSIVE CHECK
View matchup
187.89
56.0%
Standard error 6.24 points
▾
0- SpA Arceus-Ground Ice Beam vs. 252 HP / 0 SpD Giratina-Origin: 136-162 (26.9 - 32.1%) -- guaranteed 4HKO
08
Dondozo
Water
DEFENSIVE CHECK
View matchup
58.572
63.8%
Standard error 8.45 points
▾
0- SpA Earth Plate Arceus-Ground Judgment vs. 252 HP / 0 SpD Dondozo: 193-228 (38.2 - 45.2%) -- guaranteed 3HKO
09
Lunala
PsychicGhost
SOFT CHECK
View matchup
375.469
41.6%
Standard error 4.36 points
▾
252+ SpA Lunala Psyshock vs. 252 HP / 0 Def Arceus-Ground: 127-151 (28.6 - 34%) -- 0.9% chance to 3HKO
10
Arceus-Ground
Ground
SOFT CHECK
View matchup
160.745
48.6%
Standard error 6.66 points
▾
252+ Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 0 Def Arceus-Ground: 174-205 (39.1 - 46.1%) -- guaranteed 3HKO
11
Zacian-Crowned
FairySteel
SOFT CHECK
View matchup
470.078
36.9%
Standard error 3.84 points
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 0 Def Arceus-Ground: 229-271 (51.5 - 61%) -- guaranteed 2HKO
12
Necrozma-Dusk-Mane
PsychicSteel
SOFT CHECK
View matchup
432.725
37.5%
Standard error 4.01 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus-Ground: 123-145 (27.7 - 32.6%) -- guaranteed 4HKO
13
Arceus-Ghost
Ghost
SOFT CHECK
View matchup
77.947
50.7%
Standard error 7.97 points
▾
252+ SpA Spooky Plate Arceus-Ghost Judgment vs. 252 HP / 252+ SpD Arceus-Ground: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
14
Ursaluna
GroundNormal
SOFT CHECK
View matchup
34.962
52.1%
Standard error 8.45 points
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Arceus-Ground: 195-229 (43.9 - 51.5%) -- 8.6% chance to 2HKO
15
Ho-Oh
FireFlying
SOFT CHECK
View matchup
611.543
30.9%
Standard error 3.22 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Arceus-Ground: 184-217 (41.4 - 48.8%) -- guaranteed 3HKO
16
Rayquaza
DragonFlying
OFFENSIVE CHECK
View matchup
22.624
57.3%
Standard error 10.40 points
▾
252+ Atk Rayquaza Dragon Ascent vs. 252 HP / 0 Def Arceus-Ground: 204-241 (45.9 - 54.2%) -- 54.3% chance to 2HKO
17
Arceus-Fairy
Fairy
SOFT CHECK
View matchup
245.747
34.0%
Standard error 5.18 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
18
Blissey
Normal
SOFT CHECK
View matchup
77.244
42.7%
Standard error 7.83 points
▾
Blissey Seismic Toss vs. 252 HP Arceus-Ground: 100-100 (22.5 - 22.5%) -- guaranteed 5HKO
19
Kingambit
DarkSteel
SOFT CHECK
View matchup
125.154
37.4%
Standard error 7.31 points
▾
252+ Atk Black Glasses Kingambit Kowtow Cleave vs. 252 HP / 0 Def Arceus-Ground: 160-190 (36 - 42.7%) -- guaranteed 3HKO
20
Deoxys-Attack
Psychic
SOFT CHECK
View matchup
65.656
41.0%
Standard error 8.35 points
▾
252+ SpA Deoxys-Attack Psycho Boost vs. 252 HP / 252+ SpD Arceus-Ground: 204-241 (45.9 - 54.2%) -- 54.3% chance to 2HKO
21
Terapagos
Normal
SOFT CHECK
View matchup
106.11
37.7%
Standard error 8.04 points
▾
0- SpA Terapagos Ice Beam vs. 252 HP / 252+ SpD Arceus-Ground: 54-64 (12.1 - 14.4%) -- possible 7HKO
22
Eternatus
PoisonDragon
SOFT CHECK
View matchup
224.76
23.9%
Standard error 4.89 points
▾
252+ SpA Eternatus Dynamax Cannon vs. 252 HP / 252+ SpD Arceus-Ground: 124-147 (27.9 - 33.1%) -- guaranteed 4HKO
23
Flutter Mane
GhostFairy
SOFT CHECK
View matchup
22.225
46.6%
Standard error 10.58 points
▾
252+ SpA Choice Specs Flutter Mane Moonblast vs. 252 HP / 252+ SpD Arceus-Ground: 168-198 (37.8 - 44.5%) -- guaranteed 3HKO
24
Gliscor
GroundFlying
SOFT CHECK
View matchup
193.842
25.6%
Standard error 5.37 points
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Arceus-Ground: 124-147 (27.9 - 33.1%) -- guaranteed 4HKO
25
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
163.952
22.1%
Standard error 5.60 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Arceus-Ground: 166-196 (37.3 - 44.1%) -- guaranteed 3HKO
26
Groudon
Ground
SOFT CHECK
View matchup
135.14
23.8%
Standard error 6.12 points
▾
252+ Atk Groudon Precipice Blades vs. 252 HP / 0 Def Arceus-Ground: 204-241 (45.9 - 54.2%) -- 54.3% chance to 2HKO
27
Ribombee
BugFairy
SOFT CHECK
View matchup
142.406
20.9%
Standard error 5.70 points
▾
252+ SpA Ribombee Moonblast vs. 252 HP / 252+ SpD Arceus-Ground: 88-105 (19.8 - 23.6%) -- possible 5HKO
28
Ting-Lu
DarkGround
SOFT CHECK
View matchup
87.562
29.4%
Standard error 8.22 points
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Arceus-Ground: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
29
Hatterene
PsychicFairy
SOFT CHECK
View matchup
231.45
10.1%
Standard error 3.41 points
▾
252+ SpA Hatterene Misty Explosion vs. 252 HP / 252+ SpD Arceus-Ground: 118-141 (26.5 - 31.7%) -- guaranteed 4HKO
30
Deoxys-Speed
Psychic
SOFT CHECK
View matchup
114.463
6.8%
Standard error 3.86 points
▾
252+ SpA Deoxys-Speed Psycho Boost vs. 252 HP / 252+ SpD Arceus-Ground: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
Ranked #12 with 13.87% usage. Sorted by conservative score.