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
Flutter Mane
GhostFairy
OFFENSIVE CHECK
31.788
90.8%
checker faints 5.12%
▾
252+ SpA Choice Specs Flutter Mane Shadow Ball vs. 252 HP / 252+ SpD Hatterene: 312-368 (98.1 - 115.7%) -- 87.5% chance to OHKO
02
Lunala
PsychicGhost
OFFENSIVE CHECK
473.769
89.8%
checker faints 2.36%
▾
252+ SpA Lunala Moongeist Beam vs. 252 HP / 252+ SpD Hatterene: 264-312 (83 - 98.1%) -- guaranteed 2HKO
03
Arceus-Ghost
Ghost
DEFENSIVE COUNTER
137.558
89.6%
checker faints 4.48%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Arceus-Ghost: 94-112 (21.1 - 25.2%) -- 0.1% chance to 4HKO
04
Calyrex-Ice
PsychicIce
DEFENSIVE COUNTER
232.881
89.6%
checker faints 3.45%
▾
252+ SpA Hatterene Mystical Fire vs. 252 HP / 252+ SpD Calyrex-Ice: 112-134 (27.7 - 33.1%) -- guaranteed 4HKO
05
Arceus-Ground
Ground
DEFENSIVE COUNTER
249.559
89.2%
checker faints 3.39%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Arceus-Ground: 94-112 (21.1 - 25.2%) -- 0.1% chance to 4HKO
06
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
561.037
89.1%
checker faints 2.26%
▾
+1 252+ Atk Zacian-Crowned Iron Head vs. 252 HP / 0 Def Hatterene: 500-590 (157.2 - 185.5%) -- guaranteed OHKO
07
Giratina-Origin
GhostDragon
DEFENSIVE COUNTER
206.373
89.0%
checker faints 3.70%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Giratina-Origin: 216-254 (42.8 - 50.3%) -- 1.6% chance to 2HKO
08
Necrozma-Dusk-Mane
PsychicSteel
OFFENSIVE CHECK
487.287
88.3%
checker faints 2.50%
▾
0- Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Hatterene: 302-356 (94.9 - 111.9%) -- 68.8% chance to OHKO
09
Kyogre
Water
DEFENSIVE COUNTER
796.122
86.5%
checker faints 2.07%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Kyogre: 84-100 (20.7 - 24.7%) -- guaranteed 5HKO
10
Kingambit
DarkSteel
DEFENSIVE COUNTER
160.939
82.5%
checker faints 5.16%
▾
252+ SpA Hatterene Mystical Fire vs. 252 HP / 252+ SpD Kingambit: 150-178 (37.1 - 44%) -- guaranteed 3HKO
11
Rayquaza
DragonFlying
OFFENSIVE CHECK
21.358
81.5%
checker faints 8.40%
▾
252+ Atk Rayquaza Dragon Ascent vs. 252 HP / 0 Def Hatterene: 250-295 (78.6 - 92.7%) -- guaranteed 2HKO
12
Skeledirge
FireGhost
DEFENSIVE COUNTER
71.449
80.6%
checker faints 6.38%
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Skeledirge: 121-144 (29.3 - 34.9%) -- 13.2% chance to 3HKO
13
Muk-Alola
PoisonDark
DEFENSIVE COUNTER
33.122
79.9%
checker faints 6.97%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Muk-Alola: 108-127 (26 - 30.6%) -- guaranteed 4HKO
14
Ursaluna
GroundNormal
OFFENSIVE CHECK
33.172
76.7%
checker faints 7.34%
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Hatterene: 237-280 (74.5 - 88%) -- guaranteed 2HKO
15
Arceus-Fairy
Fairy
DEFENSIVE COUNTER
330.133
76.5%
checker faints 4.00%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Arceus-Fairy: 94-112 (21.1 - 25.2%) -- 0.1% chance to 4HKO
16
Arceus-Electric
Electric
DEFENSIVE COUNTER
81.676
76.3%
checker faints 6.61%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Arceus-Electric: 94-112 (21.1 - 25.2%) -- 0.1% chance to 4HKO
17
Ho-Oh
FireFlying
DEFENSIVE COUNTER
1,378.167
75.3%
checker faints 1.96%
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Ho-Oh: 75-88 (18 - 21.1%) -- possible 5HKO
18
Arceus-Water
Water
DEFENSIVE COUNTER
222.087
72.0%
checker faints 5.08%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Arceus-Water: 94-112 (21.1 - 25.2%) -- 0.1% chance to 4HKO
19
Arceus
Normal
DEFENSIVE COUNTER
386.405
71.6%
checker faints 3.85%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Arceus: 94-112 (21.1 - 25.2%) -- 0.1% chance to 4HKO
20
Kyurem-Black
DragonIce
OFFENSIVE CHECK
21.066
70.5%
checker faints 9.93%
▾
252+ Atk Teravolt Kyurem-Black Iron Head vs. 252 HP / 0 Def Hatterene: 246-290 (77.3 - 91.1%) -- guaranteed 2HKO
21
Groudon
Ground
DEFENSIVE COUNTER
293.295
67.1%
checker faints 4.71%
▾
252+ SpA Hatterene Dazzling Gleam vs. 252 HP / 252+ SpD Groudon: 115-136 (28.4 - 33.6%) -- 96.6% chance to 4HKO after Leftovers recovery
22
Grimmsnarl
DarkFairy
OFFENSIVE CHECK
111.468
65.7%
checker faints 7.75%
▾
252+ Atk Grimmsnarl Play Rough vs. 252 HP / 0 Def Hatterene: 160-189 (50.3 - 59.4%) -- guaranteed 2HKO
23
Deoxys-Attack
Psychic
OFFENSIVE CHECK
90.024
61.0%
checker faints 8.85%
▾
252+ SpA Deoxys-Attack Shadow Ball vs. 252 HP / 252+ SpD Hatterene: 174-206 (54.7 - 64.7%) -- guaranteed 2HKO
24
Eternatus
PoisonDragon
OFFENSIVE CHECK
486.904
59.6%
checker faints 3.79%
▾
252+ SpA Eternatus Sludge Bomb vs. 252 HP / 252+ SpD Hatterene: 248-294 (77.9 - 92.4%) -- guaranteed 2HKO
25
Ribombee
BugFairy
OFFENSIVE CHECK
363.192
57.9%
checker faints 4.42%
▾
252+ SpA Ribombee Moonblast vs. 252 HP / 252+ SpD Hatterene: 97-115 (30.5 - 36.1%) -- 49.9% chance to 3HKO
26
Tyranitar
RockDark
SOFT CHECK
241.431
54.9%
checker faints 5.13%
▾
252+ Atk Tyranitar Stone Edge vs. 252 HP / 0 Def Hatterene: 192-226 (60.3 - 71%) -- guaranteed 2HKO after sandstorm damage
27
Ting-Lu
DarkGround
SOFT CHECK
238.748
52.6%
checker faints 5.48%
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Hatterene: 168-198 (52.8 - 62.2%) -- guaranteed 2HKO
28
Koraidon
FightingDragon
SOFT CHECK
1,697.823
51.7%
checker faints 2.07%
▾
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
29
Terapagos
Normal
SOFT CHECK
132.957
49.8%
checker faints 7.45%
▾
252+ Atk Terapagos Rapid Spin vs. 252 HP / 0 Def Hatterene: 60-72 (18.8 - 22.6%) -- possible 5HKO
30
Landorus-Therian
GroundFlying
SOFT CHECK
256.361
48.7%
checker faints 5.31%
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Hatterene: 204-240 (64.1 - 75.4%) -- guaranteed 2HKO
Ranked #11 with 15.76% usage. Sorted by reliability score.