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
Great Tusk
GroundFighting
DEFENSIVE CHECK
View matchup
29.994
78.5%
Standard error 7.50 points
▾
Blissey Seismic Toss vs. 252 HP Great Tusk: 100-100 (23 - 23%) -- guaranteed 5HKO
02
Kingambit
DarkSteel
DEFENSIVE CHECK
View matchup
68.755
70.3%
Standard error 5.51 points
▾
Blissey Seismic Toss vs. 252 HP Kingambit: 100-100 (24.7 - 24.7%) -- guaranteed 5HKO
03
Iron Treads
GroundSteel
DEFENSIVE CHECK
View matchup
57.742
71.2%
Standard error 5.96 points
▾
Blissey Seismic Toss vs. 252 HP Iron Treads: 100-100 (26 - 26%) -- guaranteed 5HKO after Leftovers recovery
04
Excadrill
GroundSteel
OFFENSIVE CHECK
View matchup
24.064
76.9%
Standard error 8.60 points
▾
252+ Atk Excadrill Earthquake vs. 252 HP / 0 Def Blissey: 775-913 (108.5 - 127.8%) -- guaranteed OHKO
05
Ogerpon-Wellspring
GrassWater
OFFENSIVE CHECK
View matchup
29.25
73.3%
Standard error 8.18 points
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Superpower vs. 252 HP / 0 Def Blissey: 1368-1610 (191.5 - 225.4%) -- guaranteed OHKO
06
Scizor-Mega
BugSteel
OFFENSIVE CHECK
View matchup
20.652
74.2%
Standard error 9.63 points
▾
252+ Atk Scizor-Mega Close Combat vs. 252 HP / 0 Def Blissey: 1342-1580 (187.9 - 221.2%) -- guaranteed OHKO
07
Gholdengo
SteelGhost
SOFT CHECK
View matchup
243.006
48.0%
Standard error 3.20 points
▾
252+ SpA Gholdengo Focus Blast vs. 252 HP / 252+ SpD Blissey: 170-202 (23.8 - 28.2%) -- possible 5HKO
08
Iron Valiant
FairyFighting
OFFENSIVE CHECK
View matchup
21.285
73.3%
Standard error 9.59 points
▾
0- Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Blissey: 1224-1440 (171.4 - 201.6%) -- guaranteed OHKO
09
Tyranitar-Mega
RockDark
DEFENSIVE CHECK
View matchup
28.147
62.7%
Standard error 9.11 points
▾
Blissey Seismic Toss vs. 252 HP Tyranitar-Mega: 100-100 (24.7 - 24.7%) -- guaranteed 5HKO
10
Kyurem
DragonIce
SOFT CHECK
View matchup
71.651
43.5%
Standard error 5.86 points
▾
0- Atk Kyurem Icicle Spear (3 hits) vs. 252 HP / 0 Def Blissey: 381-453 (53.3 - 63.4%) -- guaranteed 2HKO after Leftovers recovery
11
Gliscor
GroundFlying
SOFT CHECK
View matchup
98.605
37.9%
Standard error 4.89 points
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Blissey: 607-715 (85 - 100.1%) -- 6.3% chance to OHKO
12
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
66.291
40.2%
Standard error 6.02 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Blissey: 817-963 (114.4 - 134.8%) -- guaranteed OHKO
13
Hatterene
PsychicFairy
SOFT CHECK
View matchup
46.863
40.7%
Standard error 7.18 points
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Blissey: 82-97 (11.4 - 13.5%) -- possible 8HKO
14
Urshifu-Rapid-Strike
FightingWater
SOFT CHECK
View matchup
28.057
49.0%
Standard error 9.44 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Blissey: 1812-2132 (253.7 - 298.5%) -- guaranteed OHKO
15
Corviknight
FlyingSteel
SOFT CHECK
View matchup
33.121
45.5%
Standard error 8.65 points
▾
252+ Atk Corviknight Brave Bird vs. 252 HP / 0 Def Blissey: 690-813 (96.6 - 113.8%) -- 81.3% chance to OHKO
16
Alomomola
Water
SOFT CHECK
View matchup
153.748
17.8%
Standard error 3.08 points
▾
252+ Atk Alomomola Liquidation vs. 252 HP / 0 Def Blissey: 445-525 (62.3 - 73.5%) -- guaranteed 2HKO after Leftovers recovery
17
Tapu Lele
PsychicFairy
SOFT CHECK
View matchup
26.119
43.6%
Standard error 9.70 points
▾
252+ SpA Tapu Lele Psyshock vs. 252 HP / 0 Def Blissey in Psychic Terrain: 784-924 (109.8 - 129.4%) -- guaranteed OHKO
18
Volcarona
BugFire
SOFT CHECK
View matchup
33.039
37.7%
Standard error 8.43 points
▾
252+ SpA Volcarona Bug Buzz vs. 252 HP / 252+ SpD Blissey: 97-115 (13.5 - 16.1%)
19
Slowking-Galar
PoisonPsychic
SOFT CHECK
View matchup
44.463
25.0%
Standard error 6.49 points
▾
252+ SpA Slowking-Galar Psyshock vs. 252 HP / 0 Def Blissey: 537-633 (75.2 - 88.6%) -- guaranteed 2HKO after Leftovers recovery
20
Terapagos
Normal
SOFT CHECK
View matchup
69.578
16.0%
Standard error 4.40 points
▾
252+ Atk Terapagos Rapid Spin vs. 252 HP / 0 Def Blissey: 241-285 (33.7 - 39.9%) -- 30.4% chance to 3HKO after Leftovers recovery
21
Pecharunt
PoisonGhost
SOFT CHECK
View matchup
20.195
42.1%
Standard error 10.99 points
▾
252+ SpA Pecharunt Malignant Chain vs. 252 HP / 252+ SpD Blissey: 81-96 (11.3 - 13.4%)
22
Charizard-Mega-Y
FireFlying
SOFT CHECK
View matchup
98.723
9.3%
Standard error 2.92 points
▾
252+ SpA Charizard-Mega-Y Overheat vs. 252 HP / 252+ SpD Blissey in Sun: 237-280 (33.1 - 39.2%) -- 12.6% chance to 3HKO after Leftovers recovery
23
Zapdos
ElectricFlying
SOFT CHECK
View matchup
69.332
11.5%
Standard error 3.83 points
▾
252+ SpA Zapdos Hurricane vs. 252 HP / 252+ SpD Blissey: 112-133 (15.6 - 18.6%) -- possible 8HKO
24
Tornadus-Therian
Flying
SOFT CHECK
View matchup
39.814
14.7%
Standard error 5.60 points
▾
0- Atk Tornadus-Therian Knock Off (97.5 BP) vs. 252 HP / 0 Def Blissey: 263-310 (36.8 - 43.4%) -- guaranteed 3HKO
25
Blissey
Normal
SOFT CHECK
View matchup
20.868
31.1%
Standard error 10.14 points
▾
Blissey Seismic Toss vs. 252 HP Blissey: 100-100 (14 - 14%)
26
Toxapex
PoisonWater
SOFT CHECK
View matchup
27.511
17.1%
Standard error 7.19 points
▾
0- Atk Toxapex Knock Off (97.5 BP) vs. 252 HP / 0 Def Blissey: 180-212 (25.2 - 29.6%) -- guaranteed 4HKO
27
Slowbro
WaterPsychic
SOFT CHECK
View matchup
23.422
18.2%
Standard error 7.97 points
▾
252+ SpA Slowbro Future Sight vs. 252 HP / 252+ SpD Blissey: 105-124 (14.7 - 17.3%) -- possible 9HKO
28
Raging Bolt
ElectricDragon
SOFT CHECK
View matchup
20.16
21.5%
Standard error 9.15 points
▾
252+ SpA Choice Specs Raging Bolt Draco Meteor vs. 252 HP / 252+ SpD Blissey: 211-250 (29.5 - 35%) -- 99.9% chance to 4HKO after Leftovers recovery
29
Tangrowth
Grass
SOFT CHECK
View matchup
20.214
15.0%
Standard error 7.95 points
▾
0- Atk Tangrowth Knock Off (97.5 BP) vs. 252 HP / 0 Def Blissey: 263-310 (36.8 - 43.4%) -- guaranteed 3HKO
Ranked #44 with 4.07% usage. Sorted by conservative score.