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
Sneasler
FightingPoison
OFFENSIVE CHECK
31.185
72.2%
checker faints 8.02%
▾
252+ Atk Sneasler Close Combat vs. 252 HP / 0 Def Ditto: 768-906 (256 - 302%) -- guaranteed OHKO
02
Kingambit
DarkSteel
DEFENSIVE COUNTER
174.131
62.6%
checker faints 6.25%
▾
Ditto vs. Kingambit: 0-0 (0 - 0%)
03
Giratina-Origin
GhostDragon
DEFENSIVE COUNTER
32.77
61.8%
checker faints 8.49%
▾
Ditto vs. Giratina-Origin: 0-0 (0 - 0%)
04
Deoxys-Speed
Psychic
OFFENSIVE CHECK
78.493
61.0%
checker faints 7.63%
▾
252+ SpA Deoxys-Speed Psycho Boost vs. 252 HP / 252+ SpD Ditto: 223-264 (74.3 - 88%) -- guaranteed 2HKO
05
Necrozma-Dusk-Mane
PsychicSteel
OFFENSIVE CHECK
135.654
60.9%
checker faints 7.18%
▾
252+ Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Ditto: 369-435 (123 - 145%) -- guaranteed OHKO
06
Arceus-Fairy
Fairy
DEFENSIVE COUNTER
154.679
59.2%
checker faints 6.74%
▾
Ditto vs. Arceus-Fairy: 0-0 (0 - 0%)
07
Arceus-Poison
Poison
DEFENSIVE COUNTER
28.34
58.1%
checker faints 9.27%
▾
Ditto vs. Arceus-Poison: 0-0 (0 - 0%)
08
Flutter Mane
GhostFairy
OFFENSIVE CHECK
72.084
56.1%
checker faints 8.03%
▾
252+ SpA Flutter Mane Moonblast vs. 252 HP / 252+ SpD Ditto: 195-229 (65 - 76.3%) -- guaranteed 2HKO
09
Arceus
Normal
DEFENSIVE COUNTER
948.244
55.1%
checker faints 2.76%
▾
Ditto vs. Arceus: 0-0 (0 - 0%)
10
Ursaluna
GroundNormal
SOFT CHECK
22.289
54.7%
checker faints 10.54%
▾
252+ Atk Ursaluna Close Combat vs. 252 HP / 0 Def Ditto: 542-638 (180.6 - 212.6%) -- guaranteed OHKO
11
Incineroar
FireDark
SOFT CHECK
173.74
54.5%
checker faints 6.25%
▾
252+ Atk Incineroar Drain Punch vs. 252 HP / 0 Def Ditto: 294-348 (98 - 116%) -- 87.5% chance to OHKO
12
Arceus-Ground
Ground
SOFT CHECK
485.998
54.4%
checker faints 3.82%
▾
252+ Atk Earth Plate Arceus-Ground Earthquake vs. 252 HP / 0 Def Ditto: 364-429 (121.3 - 143%) -- guaranteed OHKO
13
Terapagos
Normal
SOFT CHECK
32.945
53.6%
checker faints 8.69%
▾
252+ SpA Terapagos Tera Starstorm vs. 252 HP / 252+ SpD Ditto: 153-180 (51 - 60%) -- guaranteed 2HKO
14
Arceus-Water
Water
SOFT CHECK
73.222
53.3%
checker faints 8.17%
▾
252+ SpA Splash Plate Arceus-Water Judgment vs. 252 HP / 252+ SpD Ditto: 225-265 (75 - 88.3%) -- guaranteed 2HKO
15
Iron Treads
GroundSteel
SOFT CHECK
243.707
52.8%
checker faints 5.42%
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 0 Def Ditto: 288-340 (96 - 113.3%) -- 75% chance to OHKO
16
118.065
52.0%
checker faints 7.89%
▾
252+ Atk Dondozo Wave Crash vs. 252 HP / 0 Def Ditto: 321-378 (107 - 126%) -- guaranteed OHKO
17
Calyrex-Ice
PsychicIce
SOFT CHECK
255.985
52.0%
checker faints 5.22%
▾
252+ Atk Calyrex-Ice Close Combat vs. 252 HP / 0 Def Ditto: 612-722 (204 - 240.6%) -- guaranteed OHKO
18
Eternatus
PoisonDragon
SOFT CHECK
110.721
51.5%
checker faints 7.93%
▾
252+ SpA Eternatus Dynamax Cannon vs. 252 HP / 252+ SpD Ditto: 214-253 (71.3 - 84.3%) -- guaranteed 2HKO
19
276.069
51.4%
checker faints 5.05%
▾
252+ SpA Kyogre Water Spout (150 BP) vs. 252 HP / 252+ SpD Ditto in Rain: 493-582 (164.3 - 194%) -- guaranteed OHKO
20
Gliscor
GroundFlying
SOFT CHECK
374.659
51.4%
checker faints 4.25%
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Ditto: 258-304 (86 - 101.3%) -- 12.5% chance to OHKO
21
Skeledirge
FireGhost
SOFT CHECK
114.091
50.9%
checker faints 8.03%
▾
252+ SpA Skeledirge Torch Song vs. 252 HP / 252+ SpD Ditto: 141-166 (47 - 55.3%) -- 71.9% chance to 2HKO
22
Ting-Lu
DarkGround
SOFT CHECK
259.242
50.5%
checker faints 5.28%
▾
252+ Atk Ting-Lu Earthquake vs. 252 HP / 0 Def Ditto: 285-336 (95 - 112%) -- 68.8% chance to OHKO
23
Smeargle
Normal
SOFT CHECK
488.296
50.1%
checker faints 3.80%
▾
252+ Atk Smeargle Nuzzle vs. 252 HP / 0 Def Ditto: 17-21 (5.6 - 7%)
24
Lapras
WaterIce
SOFT CHECK
85.8
49.7%
checker faints 7.47%
▾
252+ SpA Lapras Whirlpool vs. 252 HP / 252+ SpD Ditto: 52-63 (17.3 - 21%) -- 0.1% chance to 3HKO after trapping damage
25
Clodsire
PoisonGround
SOFT CHECK
168.101
49.5%
checker faints 6.55%
▾
252+ Atk Clodsire Earthquake vs. 252 HP / 0 Def Ditto: 222-262 (74 - 87.3%) -- guaranteed 2HKO
26
Basculegion
WaterGhost
SOFT CHECK
25.562
48.2%
checker faints 9.88%
▾
252+ Atk Basculegion Wave Crash vs. 252 HP / 0 Def Ditto: 348-409 (116 - 136.3%) -- guaranteed OHKO
27
Calyrex-Shadow
PsychicGhost
SOFT CHECK
1,793.923
46.5%
checker faints 2.01%
▾
252+ SpA Calyrex-Shadow Psyshock vs. 252 HP / 0 Def Ditto: 306-361 (102 - 120.3%) -- guaranteed OHKO
28
Ho-Oh
FireFlying
SOFT CHECK
1,072.564
45.1%
checker faints 2.61%
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Ditto: 384-453 (128 - 151%) -- guaranteed OHKO
29
Grimmsnarl
DarkFairy
SOFT CHECK
139.348
43.9%
checker faints 7.13%
▾
252+ Atk Grimmsnarl Play Rough vs. 252 HP / 0 Def Ditto: 273-322 (91 - 107.3%) -- 43.8% chance to OHKO
30
Hatterene
PsychicFairy
SOFT CHECK
103.818
43.5%
checker faints 8.14%
▾
252+ SpA Hatterene Psyshock vs. 252 HP / 0 Def Ditto: 265-313 (88.3 - 104.3%) -- 31.3% chance to OHKO
Ranked #11 with 15.08% usage. Sorted by reliability score.