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
Blissey
Normal
DEFENSIVE COUNTER
308.221
75.4%
checker faints 4.20%
▾
252+ SpA Hadron Engine Miraidon Electro Drift vs. 252 HP / 252+ SpD Blissey in Electric Terrain: 186-220 (26 - 30.8%) -- guaranteed 4HKO
02
Arceus-Electric
Electric
DEFENSIVE COUNTER
30.077
74.7%
checker faints 7.93%
▾
252+ SpA Hadron Engine Miraidon Draco Meteor vs. 252 HP / 252+ SpD Arceus-Electric: 204-240 (45.9 - 54%) -- 48.4% chance to 2HKO
03
Sneasler
FightingPoison
OFFENSIVE CHECK
183.208
70.4%
checker faints 5.68%
▾
252+ Atk Sneasler Close Combat vs. 252 HP / 0 Def Miraidon: 216-255 (53.4 - 63.1%) -- guaranteed 2HKO
04
Tyranitar
RockDark
OFFENSIVE CHECK
37.773
70.4%
checker faints 7.43%
▾
252+ Atk Tyranitar Earthquake vs. 252 HP / 0 Def Miraidon: 246-290 (60.8 - 71.7%) -- guaranteed 2HKO after sandstorm damage
05
Magearna
SteelFairy
OFFENSIVE CHECK
24.189
70.2%
checker faints 9.30%
▾
252+ SpA Magearna Fleur Cannon vs. 252 HP / 252+ SpD Miraidon: 306-362 (75.7 - 89.6%) -- guaranteed 2HKO
06
Chien-Pao
DarkIce
OFFENSIVE CHECK
248.665
66.8%
checker faints 5.11%
▾
252+ Atk Sword of Ruin Chien-Pao Icicle Crash vs. 252 HP / 0 Def Miraidon: 386-456 (95.5 - 112.8%) -- 75% chance to OHKO
07
Calyrex-Shadow
PsychicGhost
OFFENSIVE CHECK
3,393.881
65.7%
checker faints 1.40%
▾
252+ SpA Calyrex-Shadow Psyshock vs. 252 HP / 0 Def Miraidon: 172-204 (42.5 - 50.4%) -- 1.2% chance to 2HKO
08
Arceus-Ground
Ground
DEFENSIVE COUNTER
1,591
65.2%
checker faints 2.07%
▾
252+ SpA Hadron Engine Miraidon Draco Meteor vs. 252 HP / 252+ SpD Arceus-Ground: 204-240 (45.9 - 54%) -- 48.4% chance to 2HKO
09
Calyrex-Ice
PsychicIce
DEFENSIVE COUNTER
620.157
63.6%
checker faints 3.25%
▾
252+ SpA Hadron Engine Miraidon Overheat vs. 252 HP / 252+ SpD Calyrex-Ice: 256-302 (63.3 - 74.7%) -- guaranteed 2HKO
10
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
924.24
63.4%
checker faints 2.69%
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 0 Def Miraidon: 540-636 (133.6 - 157.4%) -- guaranteed OHKO
11
Dialga
SteelDragon
OFFENSIVE CHECK
22.177
63.3%
checker faints 10.23%
12
Deoxys-Speed
Psychic
OFFENSIVE CHECK
238.02
63.2%
checker faints 5.35%
▾
252+ SpA Deoxys-Speed Psycho Boost vs. 252 HP / 252+ SpD Miraidon: 133-157 (32.9 - 38.8%) -- 99.8% chance to 3HKO
13
Ting-Lu
DarkGround
DEFENSIVE COUNTER
1,933.306
62.9%
checker faints 1.88%
▾
252+ SpA Hadron Engine Miraidon Draco Meteor vs. 252 HP / 252+ SpD Vessel of Ruin Ting-Lu: 199-235 (38.7 - 45.7%) -- guaranteed 3HKO after Leftovers recovery
14
Flutter Mane
GhostFairy
OFFENSIVE CHECK
865.16
62.5%
checker faints 2.72%
▾
252+ SpA Flutter Mane Moonblast vs. 252 HP / 252+ SpD Miraidon: 230-272 (56.9 - 67.3%) -- guaranteed 2HKO
15
Whimsicott
GrassFairy
OFFENSIVE CHECK
59.297
61.9%
checker faints 6.31%
16
Dragapult
DragonGhost
OFFENSIVE CHECK
20.09
61.8%
checker faints 10.84%
17
Deoxys-Attack
Psychic
OFFENSIVE CHECK
38.23
60.4%
checker faints 7.91%
▾
252+ SpA Deoxys-Attack Psycho Boost vs. 252 HP / 252+ SpD Miraidon: 211-249 (52.2 - 61.6%) -- guaranteed 2HKO
18
Clodsire
PoisonGround
DEFENSIVE COUNTER
1,250.016
59.8%
checker faints 2.39%
▾
252+ SpA Hadron Engine Miraidon Draco Meteor vs. 252 HP / 252+ SpD Clodsire: 229-271 (49.3 - 58.4%) -- 66% chance to 2HKO after Leftovers recovery
19
Iron Treads
GroundSteel
DEFENSIVE COUNTER
1,188.572
59.8%
checker faints 2.45%
▾
252+ SpA Hadron Engine Miraidon Overheat vs. 252 HP / 252+ SpD Iron Treads: 384-454 (100 - 118.2%) -- guaranteed OHKO
20
Arceus
Normal
DEFENSIVE COUNTER
1,940.68
59.2%
checker faints 1.92%
▾
252+ SpA Hadron Engine Miraidon Electro Drift vs. 252 HP / 252+ SpD Arceus in Electric Terrain: 204-240 (45.9 - 54%) -- 48.4% chance to 2HKO
21
Wo-Chien
DarkGrass
DEFENSIVE COUNTER
240.974
56.5%
checker faints 5.50%
▾
252+ SpA Hadron Engine Miraidon Overheat vs. 252 HP / 252+ SpD Wo-Chien: 248-294 (66.3 - 78.6%) -- guaranteed 2HKO after Leftovers recovery
22
Kyurem-Black
DragonIce
OFFENSIVE CHECK
194.447
55.2%
checker faints 6.13%
▾
252+ Atk Kyurem-Black Dragon Claw vs. 252 HP / 0 Def Miraidon: 354-416 (87.6 - 102.9%) -- 18.8% chance to OHKO
23
Kingambit
DarkSteel
SOFT CHECK
386.148
53.8%
checker faints 4.34%
▾
252+ Atk Black Glasses Kingambit Kowtow Cleave vs. 252 HP / 0 Def Miraidon: 189-223 (46.7 - 55.1%) -- 69.5% chance to 2HKO
24
Lunala
PsychicGhost
SOFT CHECK
95.156
51.5%
checker faints 7.14%
▾
252+ SpA Lunala Moonblast vs. 252 HP / 252+ SpD Miraidon: 156-184 (38.6 - 45.5%) -- guaranteed 3HKO
25
Espeon
Psychic
SOFT CHECK
30.929
50.9%
checker faints 8.99%
▾
252+ SpA Espeon Alluring Voice vs. 252 HP / 252+ SpD Miraidon: 126-150 (31.1 - 37.1%) -- 80.7% chance to 3HKO
26
Basculegion
WaterGhost
SOFT CHECK
102.039
50.6%
checker faints 8.52%
▾
252+ Atk Basculegion Wave Crash vs. 252 HP / 0 Def Miraidon: 97-114 (24 - 28.2%) -- 95.7% chance to 4HKO
27
Lugia
PsychicFlying
SOFT CHECK
29.103
50.0%
checker faints 9.27%
28
Necrozma-Dusk-Mane
PsychicSteel
SOFT CHECK
332.914
48.5%
checker faints 4.73%
▾
252+ Atk Necrozma-Dusk-Mane Earthquake vs. 252 HP / 0 Def Miraidon: 276-326 (68.3 - 80.6%) -- guaranteed 2HKO
29
Mamoswine
IceGround
SOFT CHECK
22.544
48.3%
checker faints 10.52%
▾
252+ Atk Mamoswine Earthquake vs. 252 HP / 0 Def Miraidon: 360-426 (89.1 - 105.4%) -- 31.3% chance to OHKO
30
Arceus-Fairy
Fairy
SOFT CHECK
657.619
48.0%
checker faints 3.36%
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Miraidon: 266-314 (65.8 - 77.7%) -- guaranteed 2HKO
Ranked #2 with 49.82% usage. Sorted by reliability score.