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
Medicham-Mega
FightingPsychic
OFFENSIVE CHECK
View matchup
123.041
82.1%
Standard error 3.46 points
▾
252+ Atk Pure Power Medicham-Mega High Jump Kick vs. 252 HP / 0 Def Eviolite Chansey: 2652-3120 (376.7 - 443.1%) -- guaranteed OHKO
02
Swampert-Mega
WaterGround
OFFENSIVE CHECK
View matchup
31.347
85.2%
Standard error 6.34 points
▾
252+ Atk Swampert-Mega Superpower vs. 252 HP / 0 Def Eviolite Chansey: 1088-1282 (154.5 - 182.1%) -- guaranteed OHKO
03
Skarmory
SteelFlying
DEFENSIVE CHECK
View matchup
102.768
72.3%
Standard error 4.42 points
▾
Chansey Seismic Toss vs. 252 HP Skarmory: 100-100 (29.9 - 29.9%) -- guaranteed 4HKO
04
Kartana
GrassSteel
OFFENSIVE CHECK
View matchup
69.124
74.0%
Standard error 5.27 points
▾
252+ Atk Kartana Sacred Sword vs. 252 HP / 0 Def Eviolite Chansey: 946-1114 (134.3 - 158.2%) -- guaranteed OHKO
05
Ferrothorn
GrassSteel
DEFENSIVE CHECK
View matchup
152.415
63.8%
Standard error 3.89 points
▾
Chansey Seismic Toss vs. 252 HP Ferrothorn: 100-100 (28.4 - 28.4%) -- guaranteed 5HKO after Leftovers recovery
06
Gliscor
GroundFlying
DEFENSIVE CHECK
View matchup
139.944
61.6%
Standard error 4.11 points
▾
Chansey Seismic Toss vs. 252 HP Gliscor: 100-100 (28.2 - 28.2%) -- guaranteed 4HKO
07
Excadrill
GroundSteel
OFFENSIVE CHECK
View matchup
27.665
76.1%
Standard error 8.10 points
▾
252+ Atk Excadrill Earthquake vs. 252 HP / 0 Def Eviolite Chansey: 630-742 (89.4 - 105.3%) -- 37.5% chance to OHKO
08
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
232.924
52.5%
Standard error 3.27 points
▾
252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Eviolite Chansey: 1105-1301 (156.9 - 184.8%) -- guaranteed OHKO
09
Scizor-Mega
BugSteel
OFFENSIVE CHECK
View matchup
29.124
71.5%
Standard error 8.37 points
▾
252+ Atk Scizor-Mega Superpower vs. 252 HP / 0 Def Eviolite Chansey: 1088-1282 (154.5 - 182.1%) -- guaranteed OHKO
10
Heatran
FireSteel
SOFT CHECK
View matchup
112.481
51.9%
Standard error 4.71 points
▾
252+ SpA Heatran Magma Storm vs. 252 HP / 252+ SpD Eviolite Chansey: 84-100 (11.9 - 14.2%) -- 95.5% chance to 4HKO after trapping damage
11
Tornadus-Therian
Flying
SOFT CHECK
View matchup
130.428
47.3%
Standard error 4.37 points
▾
0- Atk Tornadus-Therian Superpower vs. 252 HP / 0 Def Eviolite Chansey: 528-622 (75 - 88.3%) -- guaranteed 2HKO
12
Clefable
Fairy
SOFT CHECK
View matchup
152.673
38.8%
Standard error 3.94 points
▾
252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Eviolite Chansey: 64-76 (9 - 10.7%)
13
Serperior
Grass
DEFENSIVE CHECK
View matchup
27.94
58.7%
Standard error 9.31 points
▾
Chansey Seismic Toss vs. 252 HP Serperior: 100-100 (28.2 - 28.2%) -- guaranteed 5HKO after Leftovers recovery
14
Toxapex
PoisonWater
SOFT CHECK
View matchup
180.191
34.8%
Standard error 3.55 points
▾
0- Atk Toxapex Knock Off (97.5 BP) vs. 252 HP / 0 Def Eviolite Chansey: 147-173 (20.8 - 24.5%) -- guaranteed 5HKO
15
Chansey
Normal
SOFT CHECK
View matchup
89.272
39.7%
Standard error 5.18 points
▾
Chansey Seismic Toss vs. 252 HP Chansey: 100-100 (14.2 - 14.2%) -- guaranteed 8HKO
16
Magearna
SteelFairy
SOFT CHECK
View matchup
184.895
30.0%
Standard error 3.37 points
▾
252+ SpA Magearna Focus Blast vs. 252 HP / 252+ SpD Eviolite Chansey: 136-160 (19.3 - 22.7%) -- possible 5HKO
17
Sableye-Mega
DarkGhost
SOFT CHECK
View matchup
23.493
54.5%
Standard error 10.27 points
▾
252+ Atk Sableye-Mega Knock Off (97.5 BP) vs. 252 HP / 0 Def Eviolite Chansey: 445-525 (63.2 - 74.5%) -- guaranteed 2HKO
18
Tapu Fini
WaterFairy
SOFT CHECK
View matchup
39.675
44.6%
Standard error 7.89 points
▾
Tapu Fini Nature's Madness vs. 252 HP Chansey: 352-352 (50 - 50%) -- guaranteed 2HKO
19
Hippowdon
Ground
SOFT CHECK
View matchup
27.123
49.5%
Standard error 9.60 points
▾
252+ Atk Hippowdon Earthquake vs. 252 HP / 0 Def Eviolite Chansey: 552-651 (78.4 - 92.4%) -- guaranteed 2HKO after sandstorm damage
20
Gastrodon
WaterGround
SOFT CHECK
View matchup
24.736
51.2%
Standard error 10.05 points
▾
0- Atk Gastrodon Earthquake vs. 252 HP / 0 Def Eviolite Chansey: 282-333 (40 - 47.3%) -- guaranteed 3HKO
21
Tapu Lele
PsychicFairy
SOFT CHECK
View matchup
26.187
49.4%
Standard error 9.77 points
▾
252+ SpA Choice Specs Tapu Lele Psyshock vs. 252 HP / 0 Def Eviolite Chansey in Psychic Terrain: 1102-1297 (156.5 - 184.2%) -- guaranteed OHKO
22
Zapdos
ElectricFlying
SOFT CHECK
View matchup
68.379
31.5%
Standard error 5.62 points
▾
252+ SpA Zapdos Thunderbolt vs. 252 HP / 252+ SpD Eviolite Chansey: 73-87 (10.3 - 12.3%) -- possible 9HKO
23
Tapu Koko
ElectricFairy
SOFT CHECK
View matchup
155.486
20.8%
Standard error 3.25 points
▾
Tapu Koko Nature's Madness vs. 252 HP Chansey: 352-352 (50 - 50%) -- guaranteed 2HKO
24
Greninja
WaterDark
SOFT CHECK
View matchup
228.949
13.4%
Standard error 2.25 points
▾
0- Atk Greninja Gunk Shot vs. 252 HP / 0 Def Eviolite Chansey: 253-298 (35.9 - 42.3%) -- guaranteed 3HKO
25
Latias-Mega
DragonPsychic
SOFT CHECK
View matchup
107.453
14.5%
Standard error 3.40 points
▾
252+ SpA Latias-Mega Draco Meteor vs. 252 HP / 252+ SpD Eviolite Chansey: 115-136 (16.3 - 19.3%) -- possible 6HKO
26
Suicune
Water
SOFT CHECK
View matchup
23.857
39.7%
Standard error 10.02 points
▾
252+ SpA Suicune Scald vs. 252 HP / 252+ SpD Eviolite Chansey: 52-63 (7.3 - 8.9%)
27
Charizard-Mega-Y
FireFlying
SOFT CHECK
View matchup
55.836
13.4%
Standard error 4.57 points
▾
252+ SpA Charizard-Mega-Y Fire Blast vs. 252 HP / 252+ SpD Eviolite Chansey in Sun: 160-190 (22.7 - 26.9%) -- 44.2% chance to 4HKO
28
Cresselia
Psychic
SOFT CHECK
View matchup
24.241
24.3%
Standard error 8.71 points
▾
252+ SpA Cresselia Psyshock vs. 252 HP / 0 Def Eviolite Chansey: 339-400 (48.1 - 56.8%) -- 89.1% chance to 2HKO
29
Tangrowth
Grass
SOFT CHECK
View matchup
21.627
25.4%
Standard error 9.35 points
▾
252+ Atk Tangrowth Earthquake vs. 252 HP / 0 Def Eviolite Chansey: 340-401 (48.2 - 56.9%) -- 91.8% chance to 2HKO
30
Pelipper
WaterFlying
SOFT CHECK
View matchup
28.091
14.4%
Standard error 6.62 points
▾
252+ Atk Pelipper Knock Off (97.5 BP) vs. 252 HP / 0 Def Eviolite Chansey: 220-259 (31.2 - 36.7%) -- 73.1% chance to 3HKO
Ranked #19 with 8.86% usage. Sorted by conservative score.