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
Calyrex-Ice
PsychicIce
DEFENSIVE COUNTER
97.458
89.6%
checker faints 5.26%
▾
252+ SpA Hatterene Misty Explosion vs. 252 HP / 252+ SpD Calyrex-Ice: 111-132 (27.4 - 32.6%) -- guaranteed 4HKO
02
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
126.446
88.3%
checker faints 4.73%
▾
+1 252+ Atk Zacian-Crowned Iron Head vs. 252 HP / 0 Def Hatterene: 500-590 (157.2 - 185.5%) -- guaranteed OHKO
03
Kyogre
Water
DEFENSIVE COUNTER
63.553
88.1%
checker faints 5.74%
▾
252+ SpA Hatterene Psyshock vs. 252 HP / 0 Def Kyogre: 162-192 (40 - 47.5%) -- guaranteed 3HKO
04
Arceus-Ground
Ground
DEFENSIVE COUNTER
195.715
85.5%
checker faints 4.28%
▾
252+ SpA Hatterene Psyshock vs. 252 HP / 0 Def Arceus-Ground: 127-151 (28.6 - 34%) -- 0.9% chance to 3HKO
05
Calyrex-Shadow
PsychicGhost
OFFENSIVE CHECK
454.424
82.0%
checker faints 3.06%
▾
252+ SpA Calyrex-Shadow Astral Barrage vs. 252 HP / 252+ SpD Hatterene: 362-428 (113.8 - 134.5%) -- guaranteed OHKO
06
Ho-Oh
FireFlying
DEFENSIVE COUNTER
409.927
79.4%
checker faints 3.42%
▾
252+ SpA Hatterene Psyshock vs. 252 HP / 0 Def Ho-Oh: 162-192 (38.9 - 46.1%) -- guaranteed 3HKO
07
Kingambit
DarkSteel
DEFENSIVE COUNTER
23.668
77.3%
checker faints 8.61%
▾
252+ SpA Hatterene Misty Explosion vs. 252 HP / 252+ SpD Kingambit: 150-177 (37.1 - 43.8%) -- guaranteed 3HKO
08
Arceus
Normal
DEFENSIVE COUNTER
295.781
76.3%
checker faints 4.25%
▾
252+ SpA Hatterene Psyshock vs. 252 HP / 0 Def Arceus: 127-151 (28.6 - 34%) -- 0.9% chance to 3HKO
09
Skeledirge
FireGhost
DEFENSIVE COUNTER
58.31
76.1%
checker faints 7.79%
▾
252+ SpA Hatterene Psyshock vs. 252 HP / 0 Def Skeledirge: 150-177 (36.4 - 42.9%) -- guaranteed 3HKO
10
Lapras
WaterIce
DEFENSIVE COUNTER
28.409
76.0%
checker faints 8.02%
▾
252+ SpA Hatterene Psyshock vs. 252 HP / 0 Def Lapras: 178-211 (38.3 - 45.4%) -- guaranteed 3HKO after Leftovers recovery
11
Iron Treads
GroundSteel
DEFENSIVE COUNTER
121.104
68.7%
checker faints 7.22%
▾
252+ SpA Hatterene Misty Explosion vs. 252 HP / 252+ SpD Iron Treads: 84-99 (21.8 - 25.7%) -- possible 5HKO
12
Miraidon
ElectricDragon
OFFENSIVE CHECK
408.003
61.1%
checker faints 4.15%
▾
252+ SpA Hadron Engine Miraidon Electro Drift vs. 252 HP / 252+ SpD Hatterene in Electric Terrain: 226-267 (71 - 83.9%) -- guaranteed 2HKO after Leftovers recovery
13
Incineroar
FireDark
OFFENSIVE CHECK
83.009
59.8%
checker faints 9.18%
▾
252+ Atk Incineroar Fake Out vs. 252 HP / 0 Def Hatterene: 46-55 (14.4 - 17.2%) -- possible 9HKO
14
Arceus-Fairy
Fairy
SOFT CHECK
52.351
54.2%
checker faints 9.66%
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Hatterene: 144-169 (45.2 - 53.1%) -- 0.4% chance to 2HKO after Leftovers recovery
15
Grimmsnarl
DarkFairy
SOFT CHECK
100.536
53.8%
checker faints 8.39%
▾
252+ Atk Grimmsnarl Play Rough vs. 252 HP / 0 Def Hatterene: 160-189 (50.3 - 59.4%) -- 80.9% chance to 2HKO after Leftovers recovery
16
29.927
51.9%
checker faints 9.13%
▾
252+ Atk Dondozo Wave Crash vs. 252 HP / 0 Def Hatterene: 187-222 (58.8 - 69.8%) -- guaranteed 2HKO after Leftovers recovery
17
Ribombee
BugFairy
SOFT CHECK
165.487
51.4%
checker faints 6.71%
▾
252+ SpA Ribombee Moonblast vs. 252 HP / 252+ SpD Hatterene: 97-115 (30.5 - 36.1%) -- guaranteed 4HKO after Leftovers recovery
18
Koraidon
FightingDragon
SOFT CHECK
508.987
50.8%
checker faints 3.81%
▾
252+ Atk Orichalcum Pulse Koraidon Flare Blitz vs. 252 HP / 0 Def Hatterene in Sun: 308-363 (96.8 - 114.1%) -- 81.3% chance to OHKO
19
Eternatus
PoisonDragon
SOFT CHECK
76.137
48.2%
checker faints 8.00%
▾
252+ SpA Eternatus Sludge Bomb vs. 252 HP / 252+ SpD Hatterene: 248-294 (77.9 - 92.4%) -- guaranteed 2HKO after Leftovers recovery
20
Smeargle
Normal
SOFT CHECK
367.742
46.3%
checker faints 4.40%
▾
252+ Atk Smeargle Nuzzle vs. 252 HP / 0 Def Hatterene: 11-13 (3.4 - 4%)
21
Ting-Lu
DarkGround
SOFT CHECK
231.769
44.5%
checker faints 5.60%
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Hatterene: 168-198 (52.8 - 62.2%) -- 99.6% chance to 2HKO after Leftovers recovery
22
Flutter Mane
GhostFairy
SOFT CHECK
114.013
42.1%
checker faints 7.74%
▾
252+ SpA Flutter Mane Shadow Ball vs. 252 HP / 252+ SpD Hatterene: 210-248 (66 - 77.9%) -- guaranteed 2HKO after Leftovers recovery
23
103.818
34.9%
checker faints 7.85%
▾
Ditto vs. Hatterene: 0-0 (0 - 0%)
24
Gliscor
GroundFlying
SOFT CHECK
198.65
34.1%
checker faints 5.70%
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Hatterene: 151-178 (47.4 - 55.9%) -- 25.8% chance to 2HKO after Leftovers recovery
25
Deoxys-Speed
Psychic
SOFT CHECK
96.19
33.6%
checker faints 8.20%
▾
252+ SpA Deoxys-Speed Psycho Boost vs. 252 HP / 252+ SpD Hatterene: 72-84 (22.6 - 26.4%) -- possible 5HKO
26
Glimmora
RockPoison
SOFT CHECK
270.115
28.1%
checker faints 4.65%
▾
0- SpA Glimmora Power Gem vs. 252 HP / 252+ SpD Hatterene: 69-82 (21.6 - 25.7%) -- possible 5HKO
27
Corviknight
FlyingSteel
SOFT CHECK
44.027
18.4%
checker faints 5.84%
▾
252+ Atk Corviknight Brave Bird vs. 252 HP / 0 Def Hatterene: 171-202 (53.7 - 63.5%) -- guaranteed 2HKO after Leftovers recovery
28
Alomomola
Water
SOFT CHECK
62.995
14.8%
checker faints 4.47%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 0 Def Hatterene: 78-93 (24.5 - 29.2%) -- possible 5HKO
29
Clodsire
PoisonGround
SOFT CHECK
152.5
13.7%
checker faints 4.67%
▾
252+ Atk Clodsire Earthquake vs. 252 HP / 0 Def Hatterene: 130-154 (40.8 - 48.4%) -- guaranteed 3HKO after Leftovers recovery
Ranked #15 with 9.37% usage. Sorted by reliability score.