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
Kingambit
DarkSteel
DEFENSIVE COUNTER
141.678
89.2%
checker faints 4.43%
▾
Chansey Seismic Toss vs. 252 HP Kingambit: 100-100 (24.7 - 24.7%) -- guaranteed 5HKO
02
Tyranitar-Mega
RockDark
DEFENSIVE COUNTER
21.706
83.7%
checker faints 7.93%
▾
Chansey Seismic Toss vs. 252 HP Tyranitar-Mega: 100-100 (24.7 - 24.7%) -- guaranteed 5HKO
03
Scizor-Mega
BugSteel
OFFENSIVE CHECK
24.604
75.2%
checker faints 8.70%
▾
252+ Atk Scizor-Mega Close Combat vs. 252 HP / 0 Def Eviolite Chansey: 1088-1282 (154.5 - 182.1%) -- guaranteed OHKO
04
Melmetal
Steel
DEFENSIVE COUNTER
32.65
75.0%
checker faints 7.58%
▾
Chansey Seismic Toss vs. 252 HP Melmetal: 100-100 (21 - 21%) -- guaranteed 5HKO
05
Iron Treads
GroundSteel
DEFENSIVE COUNTER
42.708
74.7%
checker faints 6.65%
▾
Chansey Seismic Toss vs. 252 HP Iron Treads: 100-100 (26 - 26%) -- guaranteed 5HKO after Leftovers recovery
06
Great Tusk
GroundFighting
DEFENSIVE COUNTER
72.983
70.9%
checker faints 7.43%
▾
Chansey Seismic Toss vs. 252 HP Great Tusk: 100-100 (23 - 23%) -- guaranteed 5HKO
07
Iron Valiant
FairyFighting
OFFENSIVE CHECK
20.398
69.8%
checker faints 10.17%
▾
252+ Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Eviolite Chansey: 1470-1730 (208.8 - 245.7%) -- guaranteed OHKO
08
Ogerpon-Wellspring
GrassWater
OFFENSIVE CHECK
26.194
68.1%
checker faints 9.11%
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Superpower vs. 252 HP / 0 Def Eviolite Chansey: 1110-1308 (157.6 - 185.7%) -- guaranteed OHKO
09
Gholdengo
SteelGhost
OFFENSIVE CHECK
239.503
65.6%
checker faints 5.23%
▾
252+ SpA Gholdengo Focus Blast vs. 252 HP / 252+ SpD Eviolite Chansey: 136-162 (19.3 - 23%) -- possible 5HKO
10
Garchomp
DragonGround
OFFENSIVE CHECK
20.043
64.4%
checker faints 10.69%
▾
252+ Atk Garchomp Outrage vs. 252 HP / 0 Def Eviolite Chansey: 735-865 (104.4 - 122.8%) -- guaranteed OHKO
11
Dragonite
DragonFlying
OFFENSIVE CHECK
22.009
63.5%
checker faints 10.26%
▾
252+ Atk Dragonite Outrage vs. 252 HP / 0 Def Eviolite Chansey: 751-885 (106.6 - 125.7%) -- guaranteed OHKO
12
Corviknight
FlyingSteel
DEFENSIVE COUNTER
28.537
62.9%
checker faints 9.04%
▾
Chansey Seismic Toss vs. 252 HP Corviknight: 100-100 (25 - 25%) -- guaranteed 4HKO
13
Zamazenta
Fighting
OFFENSIVE CHECK
74.66
62.1%
checker faints 7.77%
▾
252+ Atk Zamazenta Close Combat vs. 252 HP / 0 Def Eviolite Chansey: 1388-1634 (197.1 - 232.1%) -- guaranteed OHKO
14
Gliscor
GroundFlying
DEFENSIVE COUNTER
105.391
58.1%
checker faints 8.18%
▾
Chansey Seismic Toss vs. 252 HP Gliscor: 100-100 (28.2 - 28.2%) -- guaranteed 4HKO
15
Ting-Lu
DarkGround
SOFT CHECK
31.992
53.2%
checker faints 8.82%
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Eviolite Chansey: 544-642 (77.2 - 91.1%) -- guaranteed 2HKO
16
Kyurem
DragonIce
SOFT CHECK
168.259
52.9%
checker faints 6.36%
▾
0- Atk Kyurem Icicle Spear (3 hits) vs. 252 HP / 0 Def Eviolite Chansey: 309-369 (43.8 - 52.4%) -- 3.2% chance to 2HKO
17
Pecharunt
PoisonGhost
SOFT CHECK
50.714
52.0%
checker faints 9.43%
▾
252+ SpA Pecharunt Malignant Chain vs. 252 HP / 252+ SpD Eviolite Chansey: 64-76 (9 - 10.7%)
18
Urshifu-Rapid-Strike
FightingWater
SOFT CHECK
35.56
50.1%
checker faints 8.38%
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Eviolite Chansey: 1470-1730 (208.8 - 245.7%) -- guaranteed OHKO
19
Landorus-Therian
GroundFlying
SOFT CHECK
33.124
50.0%
checker faints 8.69%
▾
252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Eviolite Chansey: 1105-1301 (156.9 - 184.8%) -- guaranteed OHKO
20
Tornadus-Therian
Flying
SOFT CHECK
77.324
49.9%
checker faints 7.82%
▾
0- Atk Tornadus-Therian Knock Off (97.5 BP) vs. 252 HP / 0 Def Eviolite Chansey: 214-252 (30.3 - 35.7%) -- 39.9% chance to 3HKO
21
Hatterene
PsychicFairy
SOFT CHECK
80.957
49.5%
checker faints 7.47%
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Eviolite Chansey: 66-78 (9.3 - 11%)
22
Volcarona
BugFire
SOFT CHECK
22.407
45.5%
checker faints 10.52%
▾
252+ SpA Volcarona Bug Buzz vs. 252 HP / 252+ SpD Eviolite Chansey: 78-93 (11 - 13.2%) -- possible 8HKO
23
Clefable
Fairy
SOFT CHECK
33.541
40.7%
checker faints 8.48%
▾
0- Atk Clefable Knock Off (97.5 BP) vs. 252 HP / 0 Def Eviolite Chansey: 159-188 (22.5 - 26.7%) -- 29.3% chance to 4HKO
24
Heatran
FireSteel
SOFT CHECK
52.395
38.8%
checker faints 9.48%
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Eviolite Chansey: 126-148 (17.8 - 21%) -- possible 5HKO
25
Venusaur-Mega
GrassPoison
SOFT CHECK
25.745
30.3%
checker faints 9.06%
▾
0- Atk Venusaur-Mega Knock Off (97.5 BP) vs. 252 HP / 0 Def Eviolite Chansey: 214-252 (30.3 - 35.7%) -- 39.9% chance to 3HKO
26
Alomomola
Water
SOFT CHECK
115.428
29.7%
checker faints 7.31%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 0 Def Eviolite Chansey: 275-324 (39 - 46%) -- guaranteed 3HKO
27
Tapu Lele
PsychicFairy
SOFT CHECK
89.607
28.2%
checker faints 6.63%
▾
252+ SpA Tapu Lele Psyshock vs. 252 HP / 0 Def Eviolite Chansey in Psychic Terrain: 637-750 (90.4 - 106.5%) -- 43.8% chance to OHKO
28
Slowking-Galar
PoisonPsychic
SOFT CHECK
82.195
27.9%
checker faints 6.73%
▾
252+ SpA Slowking-Galar Focus Blast vs. 252 HP / 252+ SpD Eviolite Chansey: 120-142 (17 - 20.1%) -- possible 5HKO
29
Zapdos
ElectricFlying
SOFT CHECK
109.096
22.9%
checker faints 6.76%
▾
252+ SpA Zapdos Hurricane vs. 252 HP / 252+ SpD Eviolite Chansey: 90-106 (12.7 - 15%) -- possible 7HKO
30
Latios-Mega
DragonPsychic
SOFT CHECK
74.58
21.9%
checker faints 6.41%
▾
252+ SpA Latios-Mega Draco Meteor vs. 252 HP / 252+ SpD Eviolite Chansey: 127-150 (18 - 21.3%) -- possible 5HKO
Ranked #50 with 3.56% usage. Sorted by reliability score.