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
Suicune
Water
DEFENSIVE COUNTER
24.054
95.7%
checker faints 4.15%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Suicune: 50-59 (12.3 - 14.6%) -- possible 7HKO
02
Serperior
Grass
DEFENSIVE COUNTER
44.08
93.3%
checker faints 5.29%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 252+ Def Serperior: 61-72 (17.2 - 20.3%) -- possible 5HKO
03
Garganacl
Rock
DEFENSIVE COUNTER
60.028
92.1%
checker faints 4.80%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Garganacl: 90-108 (22.2 - 26.7%) -- 15.2% chance to 4HKO
04
Mawile-Mega
SteelFairy
DEFENSIVE COUNTER
148.345
90.6%
checker faints 4.11%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Mawile-Mega: 46-55 (15.1 - 18%) -- possible 6HKO
05
Ferrothorn
GrassSteel
DEFENSIVE COUNTER
309.53
90.2%
checker faints 2.85%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 252+ Def Ferrothorn: 49-58 (13.9 - 16.4%) -- possible 7HKO
06
Melmetal
Steel
DEFENSIVE COUNTER
677.509
89.5%
checker faints 2.01%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 252+ Def Melmetal: 45-54 (9.4 - 11.3%) -- possible 9HKO
07
Hydrapple
GrassDragon
DEFENSIVE COUNTER
44.163
89.2%
checker faints 4.67%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Hydrapple: 102-120 (24.5 - 28.8%) -- 99.3% chance to 4HKO
08
Iron Hands
FightingElectric
DEFENSIVE COUNTER
60.421
88.7%
checker faints 5.71%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Iron Hands: 102-122 (19.9 - 23.8%) -- possible 5HKO
09
Manaphy
Water
DEFENSIVE COUNTER
48.478
85.6%
checker faints 7.13%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 252+ Def Manaphy: 58-69 (14.3 - 17%) -- possible 6HKO
10
Venusaur
GrassPoison
DEFENSIVE COUNTER
20.488
85.4%
checker faints 7.80%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 252+ Def Venusaur: 66-78 (18.1 - 21.4%) -- possible 5HKO
11
Ogerpon-Cornerstone
GrassRock
OFFENSIVE CHECK
34.896
85.3%
checker faints 6.00%
▾
252+ Atk Cornerstone Mask Ogerpon-Cornerstone Power Whip vs. 252 HP / 0 Def Alomomola: 588-692 (110.1 - 129.5%) -- guaranteed OHKO
12
Kartana
GrassSteel
OFFENSIVE CHECK
57.185
84.3%
checker faints 6.69%
▾
252+ Atk Kartana Leaf Blade vs. 252 HP / 0 Def Alomomola: 500-590 (93.6 - 110.4%) -- 62.5% chance to OHKO
13
Kyurem
DragonIce
OFFENSIVE CHECK
631.25
82.2%
checker faints 2.55%
▾
252+ SpA Kyurem Freeze-Dry vs. 252 HP / 252+ SpD Assault Vest Alomomola: 192-228 (35.9 - 42.6%) -- guaranteed 3HKO
14
Hoopa-Unbound
PsychicDark
OFFENSIVE CHECK
132.296
81.2%
checker faints 5.63%
▾
252+ Atk Hoopa-Unbound Hyperspace Fury vs. 252 HP / 0 Def Alomomola: 253-298 (47.3 - 55.8%) -- 78.5% chance to 2HKO
15
Kingambit
DarkSteel
DEFENSIVE COUNTER
637.613
79.7%
checker faints 2.74%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Kingambit: 48-57 (11.8 - 14.1%) -- possible 8HKO
16
Ursaluna
GroundNormal
OFFENSIVE CHECK
238.449
79.7%
checker faints 4.48%
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Alomomola: 273-322 (51.1 - 60.2%) -- guaranteed 2HKO
17
Aegislash
SteelGhost
DEFENSIVE COUNTER
42.205
78.0%
checker faints 9.01%
18
Venusaur-Mega
GrassPoison
DEFENSIVE COUNTER
401.241
75.7%
checker faints 3.56%
▾
252+ Atk Alomomola Knock Off vs. 252 HP / 252+ Def Venusaur-Mega: 34-41 (9.3 - 11.2%) -- possible 9HKO
19
Gyarados-Mega
WaterDark
OFFENSIVE CHECK
26.081
75.5%
checker faints 8.42%
▾
252+ Atk Gyarados-Mega Power Whip vs. 252 HP / 0 Def Alomomola: 394-464 (73.7 - 86.8%) -- guaranteed 2HKO
20
Tapu Fini
WaterFairy
DEFENSIVE COUNTER
170.666
75.1%
checker faints 5.66%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Tapu Fini: 50-59 (14.5 - 17.1%) -- possible 9HKO
21
Archaludon
SteelDragon
DEFENSIVE COUNTER
77.684
74.9%
checker faints 6.81%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 252+ Def Archaludon: 49-58 (12.7 - 15.1%) -- possible 7HKO
22
Scizor-Mega
BugSteel
OFFENSIVE CHECK
431.82
74.8%
checker faints 3.56%
▾
252+ Atk Scizor-Mega Close Combat vs. 252 HP / 0 Def Alomomola: 192-227 (35.9 - 42.5%) -- guaranteed 3HKO
23
Iron Crown
SteelPsychic
OFFENSIVE CHECK
117.099
74.8%
checker faints 6.93%
▾
252+ SpA Iron Crown Psyshock vs. 252 HP / 0 Def Alomomola: 166-196 (31 - 36.7%) -- 69.3% chance to 3HKO
24
Ogerpon-Wellspring
GrassWater
OFFENSIVE CHECK
964.153
74.5%
checker faints 2.37%
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Power Whip vs. 252 HP / 0 Def Alomomola: 588-692 (110.1 - 129.5%) -- guaranteed OHKO
25
Toxapex
PoisonWater
DEFENSIVE COUNTER
581.856
74.4%
checker faints 3.08%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 252+ Def Toxapex: 44-52 (14.4 - 17.1%) -- possible 6HKO
26
Pinsir-Mega
BugFlying
OFFENSIVE CHECK
88.539
74.1%
checker faints 8.01%
▾
252+ Atk Aerilate Pinsir-Mega Double-Edge vs. 252 HP / 0 Def Alomomola: 355-418 (66.4 - 78.2%) -- guaranteed 2HKO
27
Pecharunt
PoisonGhost
DEFENSIVE COUNTER
246.474
74.0%
checker faints 4.75%
▾
252+ Atk Alomomola Knock Off (97.5 BP) vs. 252 HP / 252+ Def Pecharunt: 84-100 (22.1 - 26.3%) -- 12.5% chance to 4HKO
28
Hatterene
PsychicFairy
OFFENSIVE CHECK
293.804
73.7%
checker faints 4.38%
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Assault Vest Alomomola: 106-126 (19.8 - 23.5%) -- possible 5HKO
29
Greninja
WaterDark
OFFENSIVE CHECK
131.084
73.4%
checker faints 6.65%
▾
252+ SpA Life Orb Greninja Dark Pulse vs. 252 HP / 252+ SpD Assault Vest Alomomola: 121-144 (22.6 - 26.9%) -- 38.3% chance to 4HKO
30
Charizard-Mega-X
FireDragon
OFFENSIVE CHECK
379.978
72.5%
checker faints 3.96%
▾
252+ Atk Tough Claws Charizard-Mega-X Outrage vs. 252 HP / 0 Def Alomomola: 337-397 (63.1 - 74.3%) -- guaranteed 2HKO
Ranked #1 with 24.08% usage. Sorted by reliability score.