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
Corviknight
FlyingSteel
DEFENSIVE COUNTER
93.778
77.3%
checker faints 7.34%
▾
252+ Atk Necrozma-Dusk-Mane Knock Off (97.5 BP) vs. 252 HP / 252+ Def Corviknight: 94-111 (23.5 - 27.7%) -- 80.9% chance to 4HKO
02
Calyrex-Shadow
PsychicGhost
OFFENSIVE CHECK
404.476
73.2%
checker faints 3.80%
▾
252+ SpA Calyrex-Shadow Astral Barrage vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 262-310 (65.8 - 77.8%) -- guaranteed 2HKO
03
Arceus-Ground
Ground
DEFENSIVE COUNTER
147.168
66.3%
checker faints 6.57%
▾
252+ Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 252+ Def Arceus-Ground: 132-156 (29.7 - 35.1%) -- 13.2% chance to 3HKO
04
Grafaiai
PoisonNormal
OFFENSIVE CHECK
21.524
58.0%
checker faints 10.64%
▾
252+ Atk Grafaiai Knock Off (97.5 BP) vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 115-136 (28.8 - 34.1%) -- 2.9% chance to 3HKO
05
Dondozo
Water
DEFENSIVE COUNTER
45.48
55.0%
checker faints 10.25%
▾
252+ Atk Necrozma-Dusk-Mane Photon Geyser vs. 252 HP / 252+ Def Dondozo: 135-160 (26.7 - 31.7%) -- 32.9% chance to 4HKO after Leftovers recovery
06
65.29
52.7%
checker faints 8.73%
▾
252+ SpA Kyogre Water Spout (150 BP) vs. 252 HP / 252+ SpD Necrozma-Dusk-Mane in Rain: 306-360 (76.8 - 90.4%) -- guaranteed 2HKO
07
Necrozma-Dusk-Mane
PsychicSteel
SOFT CHECK
28.1
50.0%
checker faints 9.43%
▾
252+ Atk Necrozma-Dusk-Mane Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 169-199 (42.4 - 50%) -- 0.4% chance to 2HKO
08
Miraidon
ElectricDragon
SOFT CHECK
332.914
49.7%
checker faints 4.74%
▾
252+ SpA Hadron Engine Miraidon Electro Drift vs. 252 HP / 252+ SpD Necrozma-Dusk-Mane in Electric Terrain: 217-256 (54.5 - 64.3%) -- guaranteed 2HKO
09
264.677
49.1%
checker faints 5.26%
▾
252+ Atk Arceus Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 138-163 (34.6 - 40.9%) -- guaranteed 3HKO
10
Calyrex-Ice
PsychicIce
SOFT CHECK
67.26
48.8%
checker faints 8.59%
▾
252+ Atk Calyrex-Ice High Horsepower vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 166-196 (41.7 - 49.2%) -- guaranteed 3HKO
11
Ting-Lu
DarkGround
SOFT CHECK
85.143
45.4%
checker faints 7.57%
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 195-231 (48.9 - 58%) -- 96.1% chance to 2HKO
12
Smeargle
Normal
SOFT CHECK
67.136
42.1%
checker faints 8.51%
▾
252+ Atk Smeargle Nuzzle vs. 252 HP / 0 Def Necrozma-Dusk-Mane: 8-10 (2 - 2.5%)
13
Koraidon
FightingDragon
SOFT CHECK
306.852
40.8%
checker faints 4.84%
▾
252+ Atk Orichalcum Pulse Koraidon Flare Blitz vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane in Sun: 360-424 (90.4 - 106.5%) -- 43.8% chance to OHKO
14
Skeledirge
FireGhost
SOFT CHECK
77.974
40.7%
checker faints 9.32%
▾
252+ SpA Skeledirge Torch Song vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 130-154 (32.6 - 38.6%) -- 99.3% chance to 3HKO
15
135.654
34.3%
checker faints 6.98%
▾
Ditto vs. Necrozma-Dusk-Mane: 0-0 (0 - 0%)
16
Zacian-Crowned
FairySteel
SOFT CHECK
111.496
34.3%
checker faints 7.59%
▾
+1 252+ Atk Zacian-Crowned Close Combat vs. 252 HP / 0 Def Necrozma-Dusk-Mane: 195-230 (48.9 - 57.7%) -- 96.1% chance to 2HKO
17
Ho-Oh
FireFlying
SOFT CHECK
263.131
33.8%
checker faints 5.01%
▾
252+ Atk Ho-Oh Sacred Fire vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 220-261 (55.2 - 65.5%) -- guaranteed 2HKO
18
Iron Treads
GroundSteel
SOFT CHECK
20.736
28.4%
checker faints 9.90%
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 198-234 (49.7 - 58.7%) -- 98.8% chance to 2HKO
19
Gliscor
GroundFlying
SOFT CHECK
91.805
27.4%
checker faints 7.86%
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 177-208 (44.4 - 52.2%) -- 17.6% chance to 2HKO
20
Eternatus
PoisonDragon
SOFT CHECK
75.171
17.2%
checker faints 6.15%
▾
252+ SpA Eternatus Flamethrower vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 118-141 (29.6 - 35.4%) -- 23.6% chance to 3HKO
21
Arceus-Fairy
Fairy
SOFT CHECK
54.785
16.6%
checker faints 6.99%
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Necrozma-Dusk-Mane: 69-81 (17.3 - 20.3%) -- possible 5HKO
22
Alomomola
Water
SOFT CHECK
89.818
16.5%
checker faints 5.19%
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 0 Def Necrozma-Dusk-Mane: 61-73 (15.3 - 18.3%) -- possible 6HKO
23
Ribombee
BugFairy
SOFT CHECK
24.082
14.6%
checker faints 7.20%
▾
252+ SpA Ribombee Moonblast vs. 252 HP / 252+ SpD Necrozma-Dusk-Mane: 46-55 (11.5 - 13.8%) -- possible 8HKO
24
Glimmora
RockPoison
SOFT CHECK
142.413
10.5%
checker faints 4.43%
▾
0- SpA Glimmora Mud Shot vs. 252 HP / 252+ SpD Prism Armor Necrozma-Dusk-Mane: 46-55 (11.5 - 13.8%) -- possible 8HKO
25
Grimmsnarl
DarkFairy
SOFT CHECK
52.941
3.8%
checker faints 3.40%
▾
252+ Atk Grimmsnarl Sucker Punch vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 145-172 (36.4 - 43.2%) -- guaranteed 3HKO
26
Clodsire
PoisonGround
SOFT CHECK
79.585
3.5%
checker faints 3.22%
▾
252+ Atk Clodsire Earthquake vs. 252 HP / 0 Def Prism Armor Necrozma-Dusk-Mane: 153-181 (38.4 - 45.4%) -- guaranteed 3HKO
Ranked #26 with 5.55% usage. Sorted by reliability score.