Reliability ranks observed matchups; KO rate is how often the checker knocked out or forced out the target. “Checker faints” reports the checker's own observed death rate. Categories use matchup reliability plus offensive and defensive base stats.
How to read this table
Use encounter count to judge sample size. A high-reliability check with a modest KO rate can still be useful when it consistently forces switches or limits the target.
#
Checker
Encounters
Reliability
KO Rate
01
Gholdengo
SteelGhost
OFFENSIVE CHECK
244.095
82.0%
checker faints 4.14%
▾
252+ SpA Gholdengo Make It Rain vs. 252 HP / 252+ SpD Clefable: 338-402 (85.7 - 102%) -- 12.5% chance to OHKO
02
Melmetal
Steel
DEFENSIVE COUNTER
83.591
81.9%
checker faints 7.25%
▾
252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Melmetal: 64-76 (13.5 - 16%) -- possible 7HKO
03
Venusaur-Mega
GrassPoison
DEFENSIVE COUNTER
93.003
78.9%
checker faints 5.93%
▾
252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Venusaur-Mega: 44-52 (12 - 14.2%) -- possible 7HKO
04
Kingambit
DarkSteel
DEFENSIVE COUNTER
166.829
71.6%
checker faints 6.01%
▾
252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Kingambit: 109-130 (26.9 - 32.1%) -- guaranteed 4HKO
05
Charizard-Mega-Y
FireFlying
OFFENSIVE CHECK
32.177
68.6%
checker faints 8.18%
▾
252+ SpA Charizard-Mega-Y Overheat vs. 252 HP / 252+ SpD Clefable in Sun: 313-370 (79.4 - 93.9%) -- guaranteed 2HKO after Leftovers recovery
06
Ursaluna
GroundNormal
OFFENSIVE CHECK
29.827
67.1%
checker faints 8.60%
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Clefable: 295-348 (74.8 - 88.3%) -- guaranteed 2HKO after Leftovers recovery
07
Scizor-Mega
BugSteel
OFFENSIVE CHECK
76.916
66.0%
checker faints 7.58%
▾
252+ Atk Technician Scizor-Mega Bullet Punch vs. 252 HP / 0 Def Clefable: 312-368 (79.1 - 93.4%) -- guaranteed 2HKO after Leftovers recovery
08
Ogerpon-Wellspring
GrassWater
OFFENSIVE CHECK
94.47
58.5%
checker faints 8.60%
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Power Whip vs. 252 HP / 0 Def Clefable: 316-373 (80.2 - 94.6%) -- guaranteed 2HKO after Leftovers recovery
09
Ferrothorn
GrassSteel
DEFENSIVE COUNTER
62.932
57.9%
checker faints 10.31%
▾
252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Ferrothorn: 45-53 (12.7 - 15%)
10
Volcarona
BugFire
OFFENSIVE CHECK
54.634
56.9%
checker faints 9.42%
▾
252+ SpA Volcarona Flamethrower vs. 252 HP / 252+ SpD Clefable: 129-153 (32.7 - 38.8%) -- 4.7% chance to 3HKO after Leftovers recovery
11
Hatterene
PsychicFairy
OFFENSIVE CHECK
51.427
56.1%
checker faints 9.78%
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Clefable: 109-129 (27.6 - 32.7%) -- guaranteed 4HKO
12
Pecharunt
PoisonGhost
SOFT CHECK
79.643
54.8%
checker faints 7.76%
▾
252+ SpA Pecharunt Malignant Chain vs. 252 HP / 252+ SpD Clefable: 212-252 (53.8 - 63.9%) -- guaranteed 2HKO after Leftovers recovery
13
Tapu Lele
PsychicFairy
SOFT CHECK
57.213
54.1%
checker faints 9.27%
▾
252+ SpA Tapu Lele Psyshock vs. 252 HP / 0 Def Clefable in Psychic Terrain: 243-286 (61.6 - 72.5%) -- guaranteed 2HKO after Leftovers recovery
14
Iron Treads
GroundSteel
SOFT CHECK
37.484
53.8%
checker faints 8.14%
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 0 Def Clefable: 210-247 (53.2 - 62.6%) -- guaranteed 2HKO after Leftovers recovery
15
Charizard-Mega-X
FireDragon
SOFT CHECK
84.251
53.4%
checker faints 9.12%
▾
252+ Atk Tough Claws Charizard-Mega-X Flare Blitz vs. 252 HP / 0 Def Clefable: 363-427 (92.1 - 108.3%) -- 50% chance to OHKO
16
Clodsire
PoisonGround
SOFT CHECK
57.9
48.7%
checker faints 6.57%
▾
252+ Atk Clodsire Poison Jab vs. 252 HP / 0 Def Clefable: 258-306 (65.4 - 77.6%) -- guaranteed 2HKO after Leftovers recovery
17
Heatran
FireSteel
SOFT CHECK
83.698
48.6%
checker faints 7.15%
▾
252+ SpA Heatran Flash Cannon vs. 252 HP / 252+ SpD Clefable: 222-264 (56.3 - 67%) -- guaranteed 2HKO after Leftovers recovery
18
Terapagos
Normal
SOFT CHECK
98.898
48.4%
checker faints 8.62%
▾
252+ Atk Terapagos Rapid Spin vs. 252 HP / 0 Def Clefable: 75-88 (19 - 22.3%) -- possible 6HKO
19
Slowking-Galar
PoisonPsychic
SOFT CHECK
140.422
46.3%
checker faints 7.01%
▾
252+ SpA Slowking-Galar Sludge Bomb vs. 252 HP / 252+ SpD Clefable: 222-264 (56.3 - 67%) -- guaranteed 2HKO after Leftovers recovery
20
Corviknight
FlyingSteel
SOFT CHECK
147.989
45.3%
checker faints 6.50%
▾
252+ Atk Corviknight Iron Head vs. 252 HP / 0 Def Clefable: 284-336 (72 - 85.2%) -- guaranteed 2HKO after Leftovers recovery
21
Kyurem
DragonIce
SOFT CHECK
149.016
44.8%
checker faints 6.79%
▾
252+ SpA Kyurem Ice Beam vs. 252 HP / 252+ SpD Clefable: 126-148 (31.9 - 37.5%) -- 0.2% chance to 3HKO after Leftovers recovery
22
Gliscor
GroundFlying
SOFT CHECK
266.535
43.8%
checker faints 5.15%
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Clefable: 187-222 (47.4 - 56.3%) -- 30.5% chance to 2HKO after Leftovers recovery
23
Tornadus-Therian
Flying
SOFT CHECK
117.008
42.1%
checker faints 7.57%
▾
252+ SpA Tornadus-Therian Hurricane vs. 252 HP / 252+ SpD Clefable: 135-160 (34.2 - 40.6%) -- 53.5% chance to 3HKO after Leftovers recovery
24
Toxapex
PoisonWater
SOFT CHECK
161.675
40.1%
checker faints 6.46%
▾
252+ SpA Toxapex Sludge Bomb vs. 252 HP / 252+ SpD Clefable: 144-170 (36.5 - 43.1%) -- 98.5% chance to 3HKO after Leftovers recovery
25
Chansey
Normal
SOFT CHECK
33.541
38.4%
checker faints 8.40%
▾
Chansey Seismic Toss vs. 252 HP Clefable: 100-100 (25.3 - 25.3%) -- guaranteed 5HKO after Leftovers recovery
26
Cinderace
Fire
SOFT CHECK
26.011
37.4%
checker faints 9.49%
▾
252+ Atk Libero Cinderace Gunk Shot vs. 252 HP / 0 Def Clefable: 516-608 (130.9 - 154.3%) -- guaranteed OHKO
27
Zamazenta
Fighting
SOFT CHECK
165.254
36.2%
checker faints 6.29%
▾
252+ Atk Zamazenta Heavy Slam (120 BP) vs. 252 HP / 0 Def Clefable: 352-416 (89.3 - 105.5%) -- 37.5% chance to OHKO
28
Landorus-Therian
GroundFlying
SOFT CHECK
107.601
35.8%
checker faints 7.84%
▾
252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Clefable: 419-494 (106.3 - 125.3%) -- guaranteed OHKO
29
Hoopa-Unbound
PsychicDark
SOFT CHECK
20.406
34.5%
checker faints 10.52%
▾
252+ Atk Hoopa-Unbound Hyperspace Fury vs. 252 HP / 0 Def Clefable: 135-160 (34.2 - 40.6%) -- 55.1% chance to 3HKO after Leftovers recovery
30
Raging Bolt
ElectricDragon
SOFT CHECK
132.034
32.1%
checker faints 6.93%
▾
252+ SpA Choice Specs Raging Bolt Thunderbolt vs. 252 HP / 252+ SpD Clefable: 195-229 (49.4 - 58.1%) -- 64.5% chance to 2HKO after Leftovers recovery
Ranked #38 with 5.11% usage. Sorted by reliability score.