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
Arceus-Poison
Poison
DEFENSIVE COUNTER
23.805
89.0%
checker faints 6.42%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Arceus-Poison: 48-57 (10.8 - 12.8%) -- possible 8HKO
02
Calyrex-Shadow
PsychicGhost
OFFENSIVE CHECK
455.108
87.4%
checker faints 2.63%
▾
252+ SpA Calyrex-Shadow Astral Barrage vs. 252 HP / 252+ SpD Alomomola: 294-346 (55 - 64.7%) -- guaranteed 2HKO
03
Kyurem-Black
DragonIce
OFFENSIVE CHECK
88.779
86.9%
checker faints 6.10%
▾
252+ Atk Kyurem-Black Fusion Bolt vs. 252 HP / 0 Def Alomomola: 352-416 (65.9 - 77.9%) -- guaranteed 2HKO
04
Glimmora
RockPoison
OFFENSIVE CHECK
74.944
85.9%
checker faints 5.63%
▾
0- SpA Glimmora Power Gem vs. 252 HP / 252+ SpD Alomomola: 111-132 (20.7 - 24.7%) -- guaranteed 5HKO
05
Garganacl
Rock
DEFENSIVE COUNTER
33.129
82.0%
checker faints 6.67%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Garganacl: 90-108 (22.2 - 26.7%) -- possible 5HKO
06
Terapagos
Normal
DEFENSIVE COUNTER
29.39
81.5%
checker faints 7.16%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Terapagos: 60-72 (15.6 - 18.7%) -- possible 6HKO
07
Arceus-Ground
Ground
DEFENSIVE COUNTER
289.388
80.2%
checker faints 4.04%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Arceus-Ground: 96-114 (21.6 - 25.6%) -- 0.3% chance to 4HKO
08
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
284.536
79.9%
checker faints 3.87%
▾
+1 252+ Atk Zacian-Crowned Wild Charge vs. 252 HP / 0 Def Alomomola: 432-510 (80.8 - 95.5%) -- guaranteed 2HKO
09
Skeledirge
FireGhost
DEFENSIVE COUNTER
52.058
76.6%
checker faints 8.27%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Skeledirge: 108-128 (26.2 - 31%) -- guaranteed 4HKO
10
Eternatus
PoisonDragon
OFFENSIVE CHECK
81.654
76.2%
checker faints 6.55%
▾
252+ SpA Eternatus Dynamax Cannon vs. 252 HP / 252+ SpD Alomomola: 222-262 (41.5 - 49%) -- guaranteed 3HKO
11
Walking Wake
WaterDragon
OFFENSIVE CHECK
30.66
74.9%
checker faints 7.83%
12
Arceus
Normal
DEFENSIVE COUNTER
532.777
74.2%
checker faints 3.18%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Arceus: 48-57 (10.8 - 12.8%) -- possible 8HKO
13
Arceus-Fairy
Fairy
DEFENSIVE COUNTER
75.676
72.6%
checker faints 7.19%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Arceus-Fairy: 48-57 (10.8 - 12.8%) -- possible 8HKO
14
Arceus-Water
Water
DEFENSIVE COUNTER
72.321
72.0%
checker faints 7.36%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Arceus-Water: 48-57 (10.8 - 12.8%) -- possible 8HKO
15
Dondozo
Water
DEFENSIVE COUNTER
48.123
71.4%
checker faints 9.18%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Dondozo: 50-59 (9.9 - 11.7%)
16
Smeargle
Normal
DEFENSIVE COUNTER
122.809
71.1%
checker faints 6.60%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Smeargle: 96-114 (30.5 - 36.3%) -- 49.3% chance to 3HKO
17
Necrozma-Dusk-Mane
PsychicSteel
OFFENSIVE CHECK
89.818
71.1%
checker faints 6.72%
▾
252+ Atk Necrozma-Dusk-Mane Photon Geyser vs. 252 HP / 0 Def Alomomola: 249-294 (46.6 - 55%) -- 69.5% chance to 2HKO
18
Miraidon
ElectricDragon
OFFENSIVE CHECK
854.472
68.2%
checker faints 2.68%
▾
252+ SpA Hadron Engine Miraidon Electro Drift (133.3251953125 BP) vs. 252 HP / 252+ SpD Alomomola in Electric Terrain: 968-1142 (181.2 - 213.8%) -- guaranteed OHKO
19
Groudon
Ground
DEFENSIVE COUNTER
42.051
68.2%
checker faints 7.18%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Groudon: 43-51 (10.6 - 12.6%) -- possible 8HKO
20
Calyrex-Ice
PsychicIce
DEFENSIVE COUNTER
278.912
67.3%
checker faints 4.77%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Calyrex-Ice: 42-49 (10.3 - 12.1%) -- possible 9HKO
21
Skarmory
SteelFlying
DEFENSIVE COUNTER
52.632
67.0%
checker faints 6.48%
▾
0- SpA Alomomola Scald vs. 252 HP / 0 SpD Skarmory: 51-61 (15.2 - 18.2%) -- possible 6HKO
22
Kyogre
Water
DEFENSIVE COUNTER
186.339
66.3%
checker faints 5.88%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Kyogre: 58-69 (14.3 - 17%) -- possible 6HKO
23
Lapras
WaterIce
DEFENSIVE COUNTER
157.518
66.1%
checker faints 6.18%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Lapras: 62-74 (13.3 - 15.9%)
24
Wo-Chien
DarkGrass
DEFENSIVE COUNTER
29.114
65.8%
checker faints 8.79%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Tablets of Ruin Wo-Chien: 82-98 (21.9 - 26.2%) -- possible 5HKO
25
Hatterene
PsychicFairy
OFFENSIVE CHECK
62.995
65.2%
checker faints 6.00%
▾
252+ SpA Hatterene Misty Explosion vs. 252 HP / 252+ SpD Alomomola: 211-250 (39.5 - 46.8%) -- guaranteed 3HKO
26
Koraidon
FightingDragon
OFFENSIVE CHECK
1,260.569
63.0%
checker faints 2.30%
▾
252+ Atk Orichalcum Pulse Koraidon Outrage vs. 252 HP / 0 Def Alomomola: 355-418 (66.4 - 78.2%) -- guaranteed 2HKO
27
Kingambit
DarkSteel
DEFENSIVE COUNTER
132.015
62.1%
checker faints 7.28%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Kingambit: 48-57 (11.8 - 14.1%) -- possible 8HKO
28
Clodsire
PoisonGround
DEFENSIVE COUNTER
294.357
61.4%
checker faints 4.76%
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 252+ Def Clodsire: 36-43 (7.7 - 9.2%)
29
Ting-Lu
DarkGround
DEFENSIVE COUNTER
249.022
61.1%
checker faints 5.16%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 252+ Def Ting-Lu: 92-110 (17.8 - 21.4%) -- possible 7HKO
30
Incineroar
FireDark
OFFENSIVE CHECK
73.648
60.5%
checker faints 7.93%
▾
252+ Atk Incineroar Drain Punch vs. 252 HP / 0 Def Alomomola: 100-118 (18.7 - 22%) -- possible 5HKO
Ranked #19 with 8.16% usage. Sorted by reliability score.