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
271.485
71.9%
Standard error 2.73 points
▾
252+ SpA Earth Plate Arceus-Ground Judgment vs. 252 HP / 252+ SpD Calyrex-Ice: 123-145 (30.4 - 35.8%) -- 45.3% chance to 3HKO
02
Kyogre
Water
DEFENSIVE CHECK
View matchup
668.616
67.0%
Standard error 1.82 points
▾
0- Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 0 Def Kyogre: 148-175 (36.6 - 43.3%) -- guaranteed 3HKO
03
Arceus-Water
Water
DEFENSIVE CHECK
View matchup
216.676
64.5%
Standard error 3.25 points
▾
252+ SpA Earth Plate Arceus-Ground Judgment vs. 252 HP / 252+ SpD Arceus-Water: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
04
Giratina-Origin
GhostDragon
DEFENSIVE CHECK
View matchup
184.073
60.2%
Standard error 3.61 points
▾
252+ SpA Arceus-Ground Ice Beam vs. 252 HP / 252+ SpD Giratina-Origin: 146-174 (28.9 - 34.5%) -- 5.8% chance to 3HKO
05
Arceus
Normal
DEFENSIVE CHECK
View matchup
317.113
55.2%
Standard error 2.79 points
▾
252+ SpA Earth Plate Arceus-Ground Judgment vs. 252 HP / 252+ SpD Arceus: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
06
Koraidon
FightingDragon
SOFT CHECK
View matchup
1,045.935
50.2%
Standard error 1.55 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
07
Blissey
Normal
DEFENSIVE CHECK
View matchup
177.727
57.1%
Standard error 3.71 points
▾
0- Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 0 Def Blissey: 570-672 (79.8 - 94.1%) -- guaranteed 2HKO
08
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
09
Lunala
PsychicGhost
SOFT CHECK
View matchup
371.662
49.0%
Standard error 2.59 points
▾
252+ SpA Lunala Psyshock vs. 252 HP / 0 Def Arceus-Ground: 127-151 (28.6 - 34%) -- 0.9% chance to 3HKO
10
Arceus-Ghost
Ghost
SOFT CHECK
View matchup
112.37
53.7%
Standard error 4.70 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
11
Arceus-Ground
Ground
SOFT CHECK
View matchup
203.625
48.7%
Standard error 3.50 points
▾
252+ SpA Arceus-Ground Ice Beam vs. 252 HP / 252+ SpD Arceus-Ground: 130-154 (29.2 - 34.6%) -- 7.5% chance to 3HKO
12
Ho-Oh
FireFlying
SOFT CHECK
View matchup
586.402
35.0%
Standard error 1.97 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Arceus-Ground: 184-217 (41.4 - 48.8%) -- guaranteed 3HKO
13
Zacian-Crowned
FairySteel
SOFT CHECK
View matchup
463.781
34.9%
Standard error 2.21 points
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 0 Def Arceus-Ground: 229-271 (51.5 - 61%) -- guaranteed 2HKO
14
Necrozma-Dusk-Mane
PsychicSteel
SOFT CHECK
View matchup
444.076
34.1%
Standard error 2.25 points
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus-Ground: 123-145 (27.7 - 32.6%) -- guaranteed 4HKO
15
Dondozo
Water
SOFT CHECK
View matchup
97.037
44.7%
Standard error 5.05 points
▾
252+ Atk Dondozo Wave Crash vs. 252 HP / 0 Def Arceus-Ground: 306-362 (68.9 - 81.5%) -- guaranteed 2HKO
16
Terapagos
Normal
SOFT CHECK
View matchup
106.932
40.6%
Standard error 4.75 points
▾
0- SpA Terapagos Ice Beam vs. 252 HP / 252+ SpD Arceus-Ground: 54-64 (12.1 - 14.4%) -- possible 7HKO
17
Arceus-Fairy
Fairy
SOFT CHECK
View matchup
174.795
34.5%
Standard error 3.60 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
Arceus-Flying
Flying
DEFENSIVE CHECK
View matchup
26.441
57.5%
Standard error 9.61 points
▾
0- Atk Arceus-Ground Stone Edge vs. 252 HP / 0 Def Arceus-Flying: 130-154 (29.2 - 34.6%) -- 7.5% chance to 3HKO
19
Kingambit
DarkSteel
SOFT CHECK
View matchup
154.257
34.0%
Standard error 3.81 points
▾
252+ Atk Black Glasses Kingambit Kowtow Cleave vs. 252 HP / 0 Def Arceus-Ground: 160-190 (36 - 42.7%) -- guaranteed 3HKO
20
Ditto
Normal
SOFT CHECK
View matchup
82.701
40.3%
Standard error 5.39 points
▾
Ditto vs. Arceus-Ground: 0-0 (0 - 0%)
21
Gliscor
GroundFlying
SOFT CHECK
View matchup
241.347
30.4%
Standard error 2.96 points
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Arceus-Ground: 124-147 (27.9 - 33.1%) -- guaranteed 4HKO
22
Skarmory
SteelFlying
SOFT CHECK
View matchup
34.466
51.8%
Standard error 8.51 points
▾
252+ Atk Skarmory Brave Bird vs. 252 HP / 0 Def Arceus-Ground: 133-157 (29.9 - 35.3%) -- 21.5% chance to 3HKO
23
Deoxys-Attack
Psychic
SOFT CHECK
View matchup
57.294
41.1%
Standard error 6.50 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
24
Ting-Lu
DarkGround
SOFT CHECK
View matchup
56.868
39.1%
Standard error 6.47 points
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Arceus-Ground: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
25
Eternatus
PoisonDragon
SOFT CHECK
View matchup
186.791
22.6%
Standard error 3.06 points
▾
252+ SpA Eternatus Dynamax Cannon vs. 252 HP / 252+ SpD Arceus-Ground: 124-147 (27.9 - 33.1%) -- guaranteed 4HKO
26
Arceus-Electric
Electric
SOFT CHECK
View matchup
145.808
23.7%
Standard error 3.52 points
▾
252+ SpA Arceus-Electric Ice Beam vs. 252 HP / 252+ SpD Arceus-Ground: 130-154 (29.2 - 34.6%) -- 7.5% chance to 3HKO
27
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
150.634
22.8%
Standard error 3.42 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Arceus-Ground: 166-196 (37.3 - 44.1%) -- guaranteed 3HKO
28
Ribombee
BugFairy
SOFT CHECK
View matchup
143.959
21.4%
Standard error 3.42 points
▾
252+ SpA Ribombee Moonblast vs. 252 HP / 252+ SpD Arceus-Ground: 88-105 (19.8 - 23.6%) -- possible 5HKO
29
Glimmora
RockPoison
SOFT CHECK
View matchup
144.628
19.8%
Standard error 3.31 points
▾
0- SpA Glimmora Dazzling Gleam vs. 252 HP / 252+ SpD Arceus-Ground: 42-50 (9.4 - 11.2%) -- possible 9HKO
30
Groudon
Ground
SOFT CHECK
View matchup
121.487
20.7%
Standard error 3.67 points
▾
252+ Atk Groudon Precipice Blades vs. 252 HP / 0 Def Arceus-Ground: 204-241 (45.9 - 54.2%) -- 54.3% chance to 2HKO
Ranked #11 with 15.05% usage. Sorted by conservative score.