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
Garganacl
Rock
DEFENSIVE COUNTER
97.884
86.6%
checker faints 5.92%
▾
252+ Atk Ho-Oh Earthquake vs. 252 HP / 252+ Def Garganacl: 146-172 (36.1 - 42.5%) -- 93.2% chance to 3HKO after Leftovers recovery
02
Basculegion
WaterGhost
OFFENSIVE CHECK
22.671
86.4%
checker faints 7.20%
▾
252+ Atk Basculegion Wave Crash vs. 252 HP / 0 Def Ho-Oh: 422-500 (101.4 - 120.1%) -- guaranteed OHKO
03
Kyurem-Black
DragonIce
OFFENSIVE CHECK
155.714
83.9%
checker faints 4.98%
▾
252+ Atk Kyurem-Black Fusion Bolt vs. 252 HP / 0 Def Ho-Oh: 320-378 (76.9 - 90.8%) -- guaranteed 2HKO
04
Arceus-Water
Water
DEFENSIVE COUNTER
280.935
76.7%
checker faints 4.35%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Arceus-Water: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
05
Ursaluna
GroundNormal
OFFENSIVE CHECK
78.164
75.2%
checker faints 6.56%
▾
252+ Atk Ursaluna Facade vs. 252 HP / 0 Def Ho-Oh: 145-172 (34.8 - 41.3%) -- guaranteed 3HKO
06
Arceus-Dark
Dark
DEFENSIVE COUNTER
28.015
71.1%
checker faints 8.56%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Arceus-Dark: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
07
Arceus-Ground
Ground
DEFENSIVE COUNTER
1,150.362
69.7%
checker faints 2.34%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Arceus-Ground: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
08
Arceus-Poison
Poison
DEFENSIVE COUNTER
194.463
69.4%
checker faints 5.59%
▾
252+ Atk Ho-Oh Earthquake vs. 252 HP / 252+ Def Arceus-Poison: 152-180 (34.2 - 40.5%) -- guaranteed 3HKO
09
Dondozo
Water
DEFENSIVE COUNTER
291.714
69.3%
checker faints 4.63%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Dondozo: 142-168 (28.1 - 33.3%) -- 91.1% chance to 4HKO after Leftovers recovery
10
Glalie
Ice
DEFENSIVE COUNTER
38.729
67.9%
checker faints 7.50%
▾
252+ Atk Ho-Oh Sacred Fire vs. 252 HP / 252+ Def Glalie: 300-354 (82.4 - 97.2%) -- guaranteed 2HKO
11
Carbink
RockFairy
DEFENSIVE COUNTER
32.952
66.6%
checker faints 8.21%
▾
252+ Atk Ho-Oh Earthquake vs. 252 HP / 252+ Def Carbink: 130-154 (42.7 - 50.6%) -- 2.3% chance to 2HKO
12
Calyrex-Ice
PsychicIce
DEFENSIVE COUNTER
497.134
64.6%
checker faints 3.66%
▾
252+ Atk Ho-Oh Sacred Fire vs. 252 HP / 252+ Def Calyrex-Ice: 194-230 (48 - 56.9%) -- 90.6% chance to 2HKO
13
Glimmora
RockPoison
OFFENSIVE CHECK
604.473
63.9%
checker faints 3.34%
▾
0- SpA Glimmora Power Gem vs. 252 HP / 252+ SpD Ho-Oh: 204-244 (49 - 58.6%) -- 98% chance to 2HKO
14
Eternatus
PoisonDragon
OFFENSIVE CHECK
473.528
63.1%
checker faints 3.78%
▾
252+ SpA Eternatus Dynamax Cannon vs. 252 HP / 252+ SpD Ho-Oh: 103-123 (24.7 - 29.5%) -- 99.9% chance to 4HKO
15
Sneasler
FightingPoison
OFFENSIVE CHECK
113.793
61.1%
checker faints 7.71%
▾
252+ Atk Sneasler Dire Claw vs. 252 HP / 0 Def Ho-Oh: 157-186 (37.7 - 44.7%) -- guaranteed 3HKO
16
Arceus-Fairy
Fairy
DEFENSIVE COUNTER
629.935
60.4%
checker faints 3.37%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Arceus-Fairy: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
17
Pecharunt
PoisonGhost
DEFENSIVE COUNTER
22.589
60.4%
checker faints 10.29%
▾
252+ Atk Ho-Oh Earthquake vs. 252 HP / 252+ Def Pecharunt: 124-146 (32.6 - 38.4%) -- 97.9% chance to 3HKO
18
Necrozma-Dusk-Mane
PsychicSteel
OFFENSIVE CHECK
263.131
59.9%
checker faints 5.18%
▾
252+ Atk Necrozma-Dusk-Mane Photon Geyser vs. 252 HP / 0 Def Ho-Oh: 226-267 (54.3 - 64.1%) -- guaranteed 2HKO
19
Toxapex
PoisonWater
DEFENSIVE COUNTER
202.43
58.8%
checker faints 5.86%
▾
252+ Atk Ho-Oh Earthquake vs. 252 HP / 252+ Def Toxapex: 128-152 (42.1 - 50%) -- 0.4% chance to 2HKO
20
Arceus
Normal
DEFENSIVE COUNTER
1,353.528
58.7%
checker faints 2.30%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Arceus: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
21
Grafaiai
PoisonNormal
OFFENSIVE CHECK
119.252
57.9%
checker faints 5.62%
▾
252+ Atk Grafaiai Knock Off (97.5 BP) vs. 252 HP / 0 Def Ho-Oh: 102-121 (24.5 - 29%) -- 99.9% chance to 4HKO
22
Kyogre
Water
DEFENSIVE COUNTER
840.031
57.3%
checker faints 2.93%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Kyogre: 166-196 (41 - 48.5%) -- guaranteed 3HKO
23
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
676.869
55.9%
checker faints 3.27%
▾
+1 252+ Atk Zacian-Crowned Wild Charge vs. 252 HP / 0 Def Ho-Oh: 392-462 (94.2 - 111%) -- 62.5% chance to OHKO
24
Groudon
Ground
DEFENSIVE COUNTER
103.614
55.5%
checker faints 6.86%
▾
252+ Atk Ho-Oh Sacred Fire vs. 252 HP / 252+ Def Groudon in Sun: 153-181 (37.8 - 44.8%) -- guaranteed 3HKO
25
Walking Wake
WaterDragon
SOFT CHECK
35.423
54.9%
checker faints 8.36%
26
Calyrex-Shadow
PsychicGhost
SOFT CHECK
3,436.543
53.0%
checker faints 1.47%
▾
252+ SpA Calyrex-Shadow Psyshock vs. 252 HP / 0 Def Ho-Oh: 187-222 (44.9 - 53.3%) -- 33.2% chance to 2HKO
27
Terapagos
Normal
SOFT CHECK
174.662
52.2%
checker faints 6.41%
▾
252+ SpA Terapagos Tera Starstorm vs. 252 HP / 252+ SpD Ho-Oh: 73-87 (17.5 - 20.9%) -- possible 5HKO
28
Lunala
PsychicGhost
SOFT CHECK
85.665
51.0%
checker faints 7.59%
▾
+1 252+ SpA Lunala Meteor Beam vs. 252 HP / 252+ SpD Ho-Oh: 476-560 (114.4 - 134.6%) -- guaranteed OHKO
29
Koraidon
FightingDragon
SOFT CHECK
2,544.249
50.9%
checker faints 1.71%
▾
252+ Atk Orichalcum Pulse Koraidon Outrage vs. 252 HP / 0 Def Ho-Oh: 322-381 (77.4 - 91.5%) -- guaranteed 2HKO
30
Kyurem-White
DragonIce
SOFT CHECK
70.364
49.7%
checker faints 8.31%
Ranked #6 with 25.19% usage. Sorted by reliability score.