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
Kingambit
DarkSteel
DEFENSIVE CHECK
View matchup
64.207
77.5%
Standard error 5.21 points
▾
Blissey Seismic Toss vs. 252 HP Kingambit: 100-100 (24.7 - 24.7%) -- guaranteed 5HKO
02
Ogerpon-Wellspring
GrassWater
OFFENSIVE CHECK
View matchup
35.023
82.1%
Standard error 6.47 points
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Superpower vs. 252 HP / 0 Def Blissey: 1368-1610 (191.5 - 225.4%) -- guaranteed OHKO
03
Great Tusk
GroundFighting
DEFENSIVE CHECK
View matchup
42.118
77.2%
Standard error 6.47 points
▾
Blissey Seismic Toss vs. 252 HP Great Tusk: 100-100 (23 - 23%) -- guaranteed 5HKO
04
Scizor-Mega
BugSteel
OFFENSIVE CHECK
View matchup
41.869
71.4%
Standard error 6.99 points
▾
252+ Atk Scizor-Mega Close Combat vs. 252 HP / 0 Def Blissey: 1342-1580 (187.9 - 221.2%) -- guaranteed OHKO
05
Melmetal
Steel
DEFENSIVE CHECK
View matchup
39.655
71.9%
Standard error 7.14 points
▾
Blissey Seismic Toss vs. 252 HP Melmetal: 100-100 (21 - 21%) -- guaranteed 5HKO
06
Zamazenta
Fighting
OFFENSIVE CHECK
View matchup
45.063
68.5%
Standard error 6.92 points
▾
252+ Atk Zamazenta Close Combat vs. 252 HP / 0 Def Blissey: 1710-2012 (239.4 - 281.7%) -- guaranteed OHKO
07
Iron Treads
GroundSteel
DEFENSIVE CHECK
View matchup
55.722
72.0%
Standard error 8.47 points
▾
Blissey Seismic Toss vs. 252 HP Iron Treads: 100-100 (26 - 26%) -- guaranteed 5HKO after Leftovers recovery
08
Iron Valiant
FairyFighting
OFFENSIVE CHECK
View matchup
44.218
72.8%
Standard error 9.46 points
▾
252+ Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Blissey: 1812-2132 (253.7 - 298.5%) -- guaranteed OHKO
09
Gholdengo
SteelGhost
SOFT CHECK
View matchup
234.99
39.8%
Standard error 5.27 points
▾
252+ SpA Gholdengo Focus Blast vs. 252 HP / 252+ SpD Blissey: 170-202 (23.8 - 28.2%) -- 92.6% chance to 4HKO
10
Hatterene
PsychicFairy
SOFT CHECK
View matchup
39.076
47.8%
Standard error 7.99 points
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Blissey: 82-97 (11.4 - 13.5%) -- possible 8HKO
11
Gliscor
GroundFlying
SOFT CHECK
View matchup
139.959
40.4%
Standard error 6.70 points
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Blissey: 607-715 (85 - 100.1%) -- 6.3% chance to OHKO
12
Pecharunt
PoisonGhost
DEFENSIVE CHECK
View matchup
21.756
55.3%
Standard error 10.66 points
▾
13
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
63.578
47.1%
Standard error 8.65 points
▾
252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Blissey: 1362-1603 (190.7 - 224.5%) -- guaranteed OHKO
14
Tornadus-Therian
Flying
SOFT CHECK
View matchup
50.469
37.8%
Standard error 6.82 points
▾
0- Atk Tornadus-Therian Knock Off (97.5 BP) vs. 252 HP / 0 Def Blissey: 263-310 (36.8 - 43.4%) -- guaranteed 3HKO
15
Tapu Lele
PsychicFairy
SOFT CHECK
View matchup
22.408
50.1%
Standard error 10.56 points
▾
252+ SpA Tapu Lele Psyshock vs. 252 HP / 0 Def Blissey in Psychic Terrain: 784-924 (109.8 - 129.4%) -- guaranteed OHKO
16
Corviknight
FlyingSteel
SOFT CHECK
View matchup
20.814
51.0%
Standard error 10.96 points
▾
252+ Atk Corviknight Brave Bird vs. 252 HP / 0 Def Blissey: 690-813 (96.6 - 113.8%) -- 81.3% chance to OHKO
17
Kyurem
DragonIce
SOFT CHECK
View matchup
69.674
37.0%
Standard error 8.01 points
▾
0- Atk Kyurem Icicle Spear (3 hits) vs. 252 HP / 0 Def Blissey: 381-453 (53.3 - 63.4%) -- guaranteed 2HKO
18
Alomomola
Water
SOFT CHECK
View matchup
157.008
19.4%
Standard error 4.40 points
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 0 Def Blissey: 339-399 (47.4 - 55.8%) -- 82.4% chance to 2HKO
19
Venusaur-Mega
GrassPoison
SOFT CHECK
View matchup
39.43
30.1%
Standard error 7.31 points
▾
0- Atk Venusaur-Mega Knock Off (97.5 BP) vs. 252 HP / 0 Def Blissey: 263-310 (36.8 - 43.4%) -- guaranteed 3HKO
20
Urshifu-Rapid-Strike
FightingWater
SOFT CHECK
View matchup
27.785
37.2%
Standard error 9.17 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Blissey: 1812-2132 (253.7 - 298.5%) -- guaranteed OHKO
21
Zapdos
ElectricFlying
SOFT CHECK
View matchup
104.018
21.5%
Standard error 5.41 points
▾
252+ SpA Zapdos Hurricane vs. 252 HP / 252+ SpD Blissey: 112-133 (15.6 - 18.6%) -- possible 6HKO
22
Terapagos
Normal
SOFT CHECK
View matchup
91.263
20.9%
Standard error 5.93 points
▾
252+ Atk Terapagos Rapid Spin vs. 252 HP / 0 Def Blissey: 241-285 (33.7 - 39.9%) -- guaranteed 3HKO
23
Toxapex
PoisonWater
SOFT CHECK
View matchup
71.704
18.7%
Standard error 6.45 points
▾
0- Atk Toxapex Knock Off (97.5 BP) vs. 252 HP / 0 Def Blissey: 180-212 (25.2 - 29.6%) -- guaranteed 4HKO
24
Slowking-Galar
PoisonPsychic
SOFT CHECK
View matchup
33.116
21.1%
Standard error 7.10 points
▾
252+ SpA Slowking-Galar Focus Blast vs. 252 HP / 252+ SpD Blissey: 150-178 (21 - 24.9%) -- guaranteed 5HKO
25
Charizard-Mega-Y
FireFlying
SOFT CHECK
View matchup
78.226
12.0%
Standard error 4.83 points
▾
252+ SpA Charizard-Mega-Y Overheat vs. 252 HP / 252+ SpD Blissey in Sun: 237-280 (33.1 - 39.2%) -- 99.9% chance to 3HKO
26
Volcarona
BugFire
SOFT CHECK
View matchup
21.132
33.7%
Standard error 10.28 points
▾
252+ SpA Volcarona Bug Buzz vs. 252 HP / 252+ SpD Blissey: 97-115 (13.5 - 16.1%) -- possible 7HKO
27
Raging Bolt
ElectricDragon
SOFT CHECK
View matchup
23.653
26.9%
Standard error 9.12 points
▾
252+ SpA Choice Specs Raging Bolt Draco Meteor vs. 252 HP / 252+ SpD Blissey: 211-250 (29.5 - 35%) -- 14.3% chance to 3HKO
28
Latios-Mega
DragonPsychic
SOFT CHECK
View matchup
30.183
13.8%
Standard error 6.27 points
▾
252+ SpA Latios-Mega Draco Meteor vs. 252 HP / 252+ SpD Blissey: 160-189 (22.4 - 26.4%) -- 15.7% chance to 4HKO
29
Slowbro
WaterPsychic
SOFT CHECK
View matchup
20.671
11.8%
Standard error 7.09 points
▾
0 Def Slowbro Body Press vs. 252 HP / 0 Def Blissey: 524-618 (73.3 - 86.5%) -- guaranteed 2HKO
Ranked #59 with 2.77% usage. Sorted by conservative score.