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
Greninja
WaterDark
OFFENSIVE CHECK
View matchup
75.721
72.3%
Standard error 5.15 points
▾
252+ Atk Choice Band Sniper Greninja Wicked Blow vs. 252 HP / 0 Def Arceus-Ghost on a critical hit: 630-741 (141.8 - 166.8%) -- guaranteed OHKO
02
Flutter Mane
GhostFairy
OFFENSIVE CHECK
View matchup
27.442
74.4%
Standard error 8.33 points
▾
03
Arceus-Ghost
Ghost
SOFT CHECK
View matchup
159.073
47.6%
Standard error 3.96 points
▾
252+ SpA Spooky Plate Arceus-Ghost Judgment vs. 252 HP / 252+ SpD Arceus-Ghost: 258-306 (58.1 - 68.9%) -- guaranteed 2HKO
04
Kyogre-Primal
Water
SOFT CHECK
View matchup
87.199
52.8%
Standard error 5.35 points
▾
252+ SpA Kyogre-Primal Water Spout (150 BP) vs. 252 HP / 252+ SpD Arceus-Ghost: 219-258 (49.3 - 58.1%) -- 96.9% chance to 2HKO
05
Dialga-Origin
SteelDragon
SOFT CHECK
View matchup
50.612
54.8%
Standard error 7.00 points
▾
0- SpA Adamant Crystal Dialga-Origin Doom Desire vs. 252 HP / 252+ SpD Arceus-Ghost: 147-174 (33.1 - 39.1%) -- 99.8% chance to 3HKO
06
Eternatus
PoisonDragon
SOFT CHECK
View matchup
112.487
43.2%
Standard error 4.67 points
▾
252+ SpA Eternatus Dragon Energy (150 BP) vs. 252 HP / 252+ SpD Arceus-Ghost: 186-219 (41.8 - 49.3%) -- guaranteed 3HKO
07
Audino-Mega
NormalFairy
SOFT CHECK
View matchup
86.688
42.6%
Standard error 5.31 points
▾
252+ SpA Audino-Mega Moonblast vs. 252 HP / 252+ SpD Arceus-Ghost: 78-93 (17.5 - 20.9%) -- possible 5HKO
08
Muk-Alola
PoisonDark
SOFT CHECK
View matchup
37.609
49.0%
Standard error 8.15 points
▾
252+ Atk Muk-Alola Throat Chop vs. 252 HP / 0 Def Arceus-Ghost: 212-252 (47.7 - 56.7%) -- 85.9% chance to 2HKO
09
Zamazenta
Fighting
SOFT CHECK
View matchup
26.699
53.1%
Standard error 9.66 points
▾
252+ Atk Zamazenta Gigaton Hammer vs. 252 HP / 0 Def Arceus-Ghost: 155-183 (34.9 - 41.2%) -- guaranteed 3HKO
10
Groudon-Primal
GroundFire
SOFT CHECK
View matchup
182.163
27.1%
Standard error 3.29 points
▾
252+ Atk Groudon-Primal Headlong Rush vs. 252 HP / 0 Def Arceus-Ghost: 237-279 (53.3 - 62.8%) -- guaranteed 2HKO
11
Chansey
Normal
SOFT CHECK
View matchup
149.255
26.5%
Standard error 3.61 points
▾
252+ Atk Chansey Salt Cure vs. 252 HP / 0 Def Arceus-Ghost: 13-16 (2.9 - 3.6%)
12
Ting-Lu
DarkGround
SOFT CHECK
View matchup
90.589
27.2%
Standard error 4.68 points
▾
252+ Atk Ting-Lu Knock Off vs. 252 HP / 0 Def Arceus-Ghost: 180-212 (40.5 - 47.7%) -- guaranteed 3HKO
13
Giratina
GhostDragon
SOFT CHECK
View matchup
26.321
43.2%
Standard error 9.65 points
▾
252+ SpA Giratina Infernal Parade (60 BP) vs. 252 HP / 252+ SpD Arceus-Ghost: 116-138 (26.1 - 31%) -- guaranteed 4HKO
14
Celesteela
SteelFlying
SOFT CHECK
View matchup
112.489
17.3%
Standard error 3.57 points
▾
252+ Atk Celesteela Knock Off vs. 252 HP / 0 Def Arceus-Ghost: 112-134 (25.2 - 30.1%) -- guaranteed 4HKO
15
Diancie-Mega
RockFairy
SOFT CHECK
View matchup
22.255
43.2%
Standard error 10.50 points
▾
0- Atk Pixie Plate Pixilate Diancie-Mega Explosion vs. 252 HP / 0 Def Arceus-Ghost: 448-528 (100.9 - 118.9%) -- guaranteed OHKO
16
Alakazam-Mega
Psychic
SOFT CHECK
View matchup
21.219
44.0%
Standard error 10.78 points
▾
252+ SpA Choice Specs Beads of Ruin Alakazam-Mega Psycho Boost vs. 252 HP / 252+ SpD Arceus-Ghost: 399-469 (89.8 - 105.6%) -- 37.5% chance to OHKO
17
Registeel
Steel
SOFT CHECK
View matchup
179.568
9.5%
Standard error 2.19 points
▾
252+ Atk Registeel Knock Off vs. 252 HP / 0 Def Arceus-Ghost: 94-112 (21.1 - 25.2%) -- 0.1% chance to 4HKO
18
Koraidon
FightingDragon
SOFT CHECK
View matchup
57.835
18.9%
Standard error 5.15 points
▾
252+ Atk Koraidon Glaive Rush vs. 252 HP / 0 Def Arceus-Ghost: 189-223 (42.5 - 50.2%) -- 0.4% chance to 2HKO
19
Garchomp-Mega
DragonGround
SOFT CHECK
View matchup
22.811
25.0%
Standard error 9.07 points
▾
252+ Atk Garchomp-Mega Glaive Rush vs. 252 HP / 0 Def Arceus-Ghost: 226-267 (50.9 - 60.1%) -- guaranteed 2HKO
20
Arceus-Poison
Poison
SOFT CHECK
View matchup
23.141
4.3%
Standard error 4.20 points
▾
252+ SpA Earth Plate Arceus-Poison Judgment vs. 252 HP / 252+ SpD Arceus-Ghost: 86-102 (19.3 - 22.9%) -- possible 5HKO
21
Blissey
Normal
SOFT CHECK
View matchup
24.759
14.9%
Standard error 7.16 points
▾
252+ Atk Blissey U-turn vs. 252 HP / 0 Def Arceus-Ghost: 12-14 (2.7 - 3.1%)
Ranked #2 with 48.15% usage. Sorted by conservative score.