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
Excadrill
GroundSteel
OFFENSIVE CHECK
View matchup
302.702
73.8%
Standard error 2.53 points
▾
252+ Atk Excadrill Iron Head vs. 252 HP / 0 Def Clefable: 384-452 (97.4 - 114.7%) -- 81.3% chance to OHKO
02
Metagross-Mega
SteelPsychic
DEFENSIVE CHECK
View matchup
104.777
78.7%
Standard error 4.00 points
▾
252+ SpA Clefable Flamethrower vs. 252 HP / 252+ SpD Metagross-Mega: 118-140 (32.4 - 38.4%) -- 98.1% chance to 3HKO
03
Venusaur-Mega
GrassPoison
DEFENSIVE CHECK
View matchup
44.728
80.1%
Standard error 5.97 points
▾
252+ SpA Clefable Flamethrower vs. 252 HP / 252+ SpD Thick Fat Venusaur-Mega: 56-68 (15.3 - 18.6%) -- possible 6HKO
04
Talonflame
FireFlying
OFFENSIVE CHECK
View matchup
23.057
82.0%
Standard error 8.00 points
▾
252+ Atk Gale Wings Talonflame Brave Bird vs. 252 HP / 0 Def Clefable: 204-240 (51.7 - 60.9%) -- 94.1% chance to 2HKO after Leftovers recovery
05
Bisharp
DarkSteel
OFFENSIVE CHECK
View matchup
20.849
79.0%
Standard error 8.91 points
▾
252+ Atk Bisharp Iron Head vs. 252 HP / 0 Def Clefable: 362-428 (91.8 - 108.6%) -- 50% chance to OHKO
06
Heatran
FireSteel
OFFENSIVE CHECK
View matchup
85.719
59.9%
Standard error 5.29 points
▾
252+ SpA Heatran Magma Storm vs. 252 HP / 252+ SpD Clefable: 139-165 (35.2 - 41.8%) -- 83.5% chance to 3HKO after Leftovers recovery
07
Serperior
Grass
DEFENSIVE CHECK
View matchup
36.58
65.7%
Standard error 7.85 points
▾
252+ SpA Clefable Flamethrower vs. 252 HP / 252+ SpD Serperior: 130-154 (36.7 - 43.5%) -- guaranteed 3HKO
08
Clefable
Fairy
SOFT CHECK
View matchup
266.499
46.0%
Standard error 3.05 points
▾
252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Clefable: 106-126 (26.9 - 31.9%) -- 40.2% chance to 4HKO after Leftovers recovery
09
Gliscor
GroundFlying
DEFENSIVE CHECK
View matchup
37.323
62.7%
Standard error 7.92 points
▾
252+ SpA Clefable Ice Beam vs. 252 HP / 252+ SpD Gliscor: 300-356 (84.7 - 100.5%) -- 6.3% chance to OHKO
10
Volcanion
FireWater
SOFT CHECK
View matchup
62.43
53.6%
Standard error 6.31 points
▾
252+ SpA Volcanion Sludge Wave vs. 252 HP / 252+ SpD Clefable: 176-208 (44.6 - 52.7%) -- guaranteed 3HKO after Leftovers recovery
11
Scizor-Mega
BugSteel
SOFT CHECK
View matchup
54.603
52.1%
Standard error 6.76 points
▾
252+ Atk Technician Scizor-Mega Bullet Punch vs. 252 HP / 0 Def Clefable: 312-368 (79.1 - 93.4%) -- guaranteed 2HKO after Leftovers recovery
12
Chansey
Normal
SOFT CHECK
View matchup
75.289
44.9%
Standard error 5.73 points
▾
Chansey Seismic Toss vs. 252 HP Clefable: 100-100 (25.3 - 25.3%) -- guaranteed 5HKO after Leftovers recovery
13
Zapdos
ElectricFlying
SOFT CHECK
View matchup
122.878
37.0%
Standard error 4.35 points
▾
252+ SpA Zapdos Thunderbolt vs. 252 HP / 252+ SpD Clefable: 121-144 (30.7 - 36.5%) -- guaranteed 4HKO after Leftovers recovery
14
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
59.085
45.4%
Standard error 6.48 points
▾
252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Clefable: 419-494 (106.3 - 125.3%) -- guaranteed OHKO
15
Ferrothorn
GrassSteel
SOFT CHECK
View matchup
86.319
40.4%
Standard error 5.28 points
▾
252+ Atk Ferrothorn Power Whip vs. 252 HP / 0 Def Clefable: 223-264 (56.5 - 67%) -- guaranteed 2HKO after Leftovers recovery
16
Keldeo
WaterFighting
SOFT CHECK
View matchup
111.871
29.6%
Standard error 4.32 points
▾
252+ SpA Choice Specs Keldeo Hydro Pump vs. 252 HP / 252+ SpD Clefable: 228-268 (57.8 - 68%) -- guaranteed 2HKO after Leftovers recovery
17
Lopunny-Mega
NormalFighting
SOFT CHECK
View matchup
50.543
37.7%
Standard error 6.82 points
▾
252+ Atk Lopunny-Mega Return vs. 252 HP / 0 Def Clefable: 246-291 (62.4 - 73.8%) -- guaranteed 2HKO after Leftovers recovery
18
Thundurus
ElectricFlying
SOFT CHECK
View matchup
43.649
34.9%
Standard error 7.22 points
▾
252+ SpA Thundurus Thunderbolt vs. 252 HP / 252+ SpD Clefable: 121-144 (30.7 - 36.5%) -- guaranteed 4HKO after Leftovers recovery
19
Weavile
DarkIce
SOFT CHECK
View matchup
73.788
26.1%
Standard error 5.11 points
▾
252+ Atk Choice Band Weavile Icicle Crash vs. 252 HP / 0 Def Clefable: 280-330 (71 - 83.7%) -- guaranteed 2HKO after Leftovers recovery
20
Garchomp
DragonGround
SOFT CHECK
View matchup
85.963
23.8%
Standard error 4.59 points
▾
252+ Atk Garchomp Earthquake vs. 252 HP / 0 Def Clefable: 232-274 (58.8 - 69.5%) -- guaranteed 2HKO after Leftovers recovery
21
Tornadus-Therian
Flying
SOFT CHECK
View matchup
113.209
20.3%
Standard error 3.78 points
▾
0- SpA Tornadus-Therian Hurricane vs. 252 HP / 252+ SpD Clefable: 90-106 (22.8 - 26.9%) -- possible 5HKO
22
Rotom-Wash
ElectricWater
SOFT CHECK
View matchup
112.23
20.3%
Standard error 3.80 points
▾
252+ SpA Rotom-Wash Hydro Pump vs. 252 HP / 252+ SpD Clefable: 132-156 (33.5 - 39.5%) -- 17.3% chance to 3HKO after Leftovers recovery
23
Slowbro
WaterPsychic
SOFT CHECK
View matchup
35.636
28.7%
Standard error 7.58 points
▾
252+ SpA Slowbro Psyshock vs. 252 HP / 0 Def Clefable: 156-184 (39.5 - 46.7%) -- guaranteed 3HKO after Leftovers recovery
24
Skarmory
SteelFlying
SOFT CHECK
View matchup
21.728
34.7%
Standard error 10.21 points
▾
252+ Atk Skarmory Iron Head vs. 252 HP / 0 Def Clefable: 270-318 (68.5 - 80.7%) -- guaranteed 2HKO after Leftovers recovery
25
Tyranitar
RockDark
SOFT CHECK
View matchup
31.544
13.8%
Standard error 6.15 points
▾
252+ Atk Tyranitar Stone Edge vs. 252 HP / 0 Def Clefable: 238-282 (60.4 - 71.5%) -- guaranteed 2HKO after Leftovers recovery
26
Latios
DragonPsychic
SOFT CHECK
View matchup
24.172
17.8%
Standard error 7.78 points
▾
252+ SpA Life Orb Latios Psyshock vs. 252 HP / 0 Def Clefable: 242-286 (61.4 - 72.5%) -- guaranteed 2HKO after Leftovers recovery
27
Latias-Mega
DragonPsychic
SOFT CHECK
View matchup
21.071
21.6%
Standard error 8.97 points
▾
252+ SpA Latias-Mega Psychic vs. 252 HP / 252+ SpD Clefable: 132-156 (33.5 - 39.5%) -- 17.3% chance to 3HKO after Leftovers recovery
Ranked #2 with 24.55% usage. Sorted by conservative score.