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
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
199.276
81.9%
checker faints 4.60%
▾
+1 252+ Atk Zacian-Crowned Iron Head vs. 252 HP / 0 Def Arceus-Fairy: 408-482 (91.8 - 108.5%) -- 56.3% chance to OHKO
02
Calyrex-Shadow
PsychicGhost
OFFENSIVE CHECK
553.499
77.1%
checker faints 3.07%
▾
252+ SpA Calyrex-Shadow Astral Barrage vs. 252 HP / 252+ SpD Arceus-Fairy: 163-193 (36.7 - 43.4%) -- guaranteed 3HKO
03
Necrozma-Dusk-Mane
PsychicSteel
OFFENSIVE CHECK
54.785
76.2%
checker faints 8.08%
▾
252+ Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus-Fairy: 356-420 (80.1 - 94.5%) -- guaranteed 2HKO
04
Clodsire
PoisonGround
DEFENSIVE COUNTER
193.285
74.9%
checker faints 5.33%
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Clodsire: 73-87 (15.7 - 18.7%) -- possible 8HKO
05
Flutter Mane
GhostFairy
OFFENSIVE CHECK
22.298
72.2%
checker faints 9.49%
▾
252+ SpA Flutter Mane Moonblast vs. 252 HP / 252+ SpD Arceus-Fairy: 111-132 (25 - 29.7%) -- guaranteed 4HKO
06
Kyogre
Water
DEFENSIVE COUNTER
148.175
71.4%
checker faints 6.31%
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Kyogre: 117-138 (28.9 - 34.1%) -- 2.1% chance to 3HKO
07
Eternatus
PoisonDragon
OFFENSIVE CHECK
93.596
61.4%
checker faints 7.08%
▾
252+ SpA Eternatus Sludge Bomb vs. 252 HP / 252+ SpD Arceus-Fairy: 222-264 (50 - 59.4%) -- guaranteed 2HKO
08
Arceus-Ground
Ground
DEFENSIVE COUNTER
235.97
56.5%
checker faints 5.57%
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Arceus-Ground: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
09
333.227
53.8%
checker faints 4.67%
▾
252+ Atk Arceus Extreme Speed vs. 252 HP / 0 Def Arceus-Fairy: 117-138 (26.3 - 31%) -- guaranteed 4HKO
10
Calyrex-Ice
PsychicIce
SOFT CHECK
113.904
50.0%
checker faints 7.83%
▾
252+ Atk Calyrex-Ice Glacial Lance vs. 252 HP / 0 Def Arceus-Fairy: 220-261 (49.5 - 58.7%) -- 98.8% chance to 2HKO
11
Glimmora
RockPoison
SOFT CHECK
136.863
48.3%
checker faints 7.21%
▾
0- SpA Glimmora Power Gem vs. 252 HP / 252+ SpD Arceus-Fairy: 63-75 (14.1 - 16.8%) -- possible 6HKO
12
Arceus-Fairy
Fairy
SOFT CHECK
135.653
47.9%
checker faints 7.33%
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Arceus-Fairy: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
13
Miraidon
ElectricDragon
SOFT CHECK
657.619
44.9%
checker faints 3.34%
▾
252+ SpA Hadron Engine Miraidon Electro Drift vs. 252 HP / 252+ SpD Arceus-Fairy in Electric Terrain: 204-240 (45.9 - 54%) -- 48.4% chance to 2HKO
14
Skeledirge
FireGhost
SOFT CHECK
73.843
44.7%
checker faints 9.96%
▾
252+ SpA Skeledirge Torch Song vs. 252 HP / 252+ SpD Arceus-Fairy: 82-97 (18.4 - 21.8%) -- possible 5HKO
15
Koraidon
FightingDragon
SOFT CHECK
826.871
44.3%
checker faints 2.97%
▾
252+ Atk Orichalcum Pulse Koraidon Flare Blitz vs. 252 HP / 0 Def Arceus-Fairy in Sun: 253-298 (56.9 - 67.1%) -- guaranteed 2HKO
16
Kingambit
DarkSteel
SOFT CHECK
75.081
38.3%
checker faints 9.62%
▾
252+ Atk Kingambit Iron Head vs. 252 HP / 0 Def Arceus-Fairy: 254-300 (57.2 - 67.5%) -- guaranteed 2HKO
17
Hatterene
PsychicFairy
SOFT CHECK
52.351
34.5%
checker faints 9.25%
▾
252+ SpA Hatterene Psyshock vs. 252 HP / 0 Def Arceus-Fairy: 127-151 (28.6 - 34%) -- 0.9% chance to 3HKO
18
Smeargle
Normal
SOFT CHECK
197.196
32.8%
checker faints 5.61%
▾
252+ Atk Smeargle Nuzzle vs. 252 HP / 0 Def Arceus-Fairy: 9-11 (2 - 2.4%)
19
Iron Treads
GroundSteel
SOFT CHECK
154.569
32.5%
checker faints 6.40%
▾
252+ Atk Iron Treads Iron Head vs. 252 HP / 0 Def Arceus-Fairy: 222-264 (50 - 59.4%) -- guaranteed 2HKO
20
Ho-Oh
FireFlying
SOFT CHECK
629.935
32.0%
checker faints 3.20%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Arceus-Fairy: 184-217 (41.4 - 48.8%) -- guaranteed 3HKO
21
154.679
31.2%
checker faints 6.40%
▾
Ditto vs. Arceus-Fairy: 0-0 (0 - 0%)
22
Gliscor
GroundFlying
SOFT CHECK
102.903
28.7%
checker faints 7.64%
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Arceus-Fairy: 124-147 (27.9 - 33.1%) -- guaranteed 4HKO
23
Arceus-Water
Water
SOFT CHECK
23.147
26.2%
checker faints 9.14%
▾
252+ SpA Splash Plate Arceus-Water Judgment vs. 252 HP / 252+ SpD Arceus-Fairy: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
24
Ribombee
BugFairy
SOFT CHECK
48.253
19.5%
checker faints 8.06%
▾
252+ SpA Ribombee Moonblast vs. 252 HP / 252+ SpD Arceus-Fairy: 88-105 (19.8 - 23.6%) -- possible 5HKO
25
Ting-Lu
DarkGround
SOFT CHECK
173.481
19.3%
checker faints 5.15%
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Arceus-Fairy: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
26
Chien-Pao
DarkIce
SOFT CHECK
57.978
18.9%
checker faints 7.00%
▾
252+ Atk Sword of Ruin Chien-Pao Icicle Crash vs. 252 HP / 0 Def Arceus-Fairy: 165-195 (37.1 - 43.9%) -- guaranteed 3HKO
27
Corviknight
FlyingSteel
SOFT CHECK
66.697
17.6%
checker faints 6.58%
▾
252+ Atk Corviknight Brave Bird vs. 252 HP / 0 Def Arceus-Fairy: 141-166 (31.7 - 37.3%) -- 87.1% chance to 3HKO
28
Incineroar
FireDark
SOFT CHECK
32.86
17.4%
checker faints 6.61%
▾
252+ Atk Incineroar Fake Out vs. 252 HP / 0 Def Arceus-Fairy: 38-45 (8.5 - 10.1%)
29
Alomomola
Water
SOFT CHECK
75.676
11.1%
checker faints 5.02%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 0 Def Arceus-Fairy: 64-76 (14.4 - 17.1%) -- possible 6HKO
30
Grimmsnarl
DarkFairy
SOFT CHECK
61.673
8.4%
checker faints 4.13%
▾
252+ Atk Grimmsnarl Play Rough vs. 252 HP / 0 Def Arceus-Fairy: 130-154 (29.2 - 34.6%) -- 6.3% chance to 3HKO
Ranked #18 with 8.24% usage. Sorted by reliability score.