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
Tapu Fini
WaterFairy
DEFENSIVE COUNTER
118.984
75.0%
checker faints 6.80%
▾
252+ Atk Zamazenta Heavy Slam (120 BP) vs. 252 HP / 252+ Def Tapu Fini: 89-105 (25.8 - 30.5%) -- 1.5% chance to 4HKO after Leftovers recovery
02
Venusaur-Mega
GrassPoison
DEFENSIVE COUNTER
246.988
67.4%
checker faints 5.11%
▾
252+ Atk Zamazenta Stone Edge vs. 252 HP / 252+ Def Venusaur-Mega: 71-84 (19.5 - 23%) -- possible 5HKO
03
Pinsir-Mega
BugFlying
OFFENSIVE CHECK
87.37
67.4%
checker faints 8.66%
▾
252+ Atk Aerilate Pinsir-Mega Double-Edge vs. +1 252 HP / 0 Def Zamazenta: 350-414 (90.2 - 106.7%) -- 37.5% chance to OHKO
04
Iron Crown
SteelPsychic
OFFENSIVE CHECK
50.659
66.7%
checker faints 9.34%
▾
252+ SpA Iron Crown Psychic Noise vs. 252 HP / 252+ SpD Zamazenta: 168-200 (43.2 - 51.5%) -- 7.4% chance to 2HKO
05
Necrozma
Psychic
OFFENSIVE CHECK
29.371
61.0%
checker faints 9.00%
06
Keldeo
WaterFighting
OFFENSIVE CHECK
192.077
59.8%
checker faints 6.11%
▾
252+ SpA Keldeo Hydro Pump vs. 252 HP / 252+ SpD Zamazenta: 129-153 (33.2 - 39.4%) -- 11.9% chance to 3HKO after Leftovers recovery
07
Sinistcha
GrassGhost
OFFENSIVE CHECK
20.286
58.2%
checker faints 10.95%
08
Tapu Lele
PsychicFairy
OFFENSIVE CHECK
348.237
58.1%
checker faints 4.50%
▾
252+ SpA Tapu Lele Future Sight vs. 252 HP / 252+ SpD Zamazenta in Psychic Terrain: 368-434 (94.8 - 111.8%) -- 68.8% chance to OHKO
09
Kommo-o
DragonFighting
DEFENSIVE COUNTER
63.224
56.8%
checker faints 8.66%
▾
252+ Atk Zamazenta Close Combat vs. 252 HP / 252+ Def Kommo-o: 126-148 (35.5 - 41.8%) -- guaranteed 3HKO
10
Iron Valiant
FairyFighting
OFFENSIVE CHECK
380.265
56.5%
checker faints 4.36%
▾
252+ Atk Iron Valiant Spirit Break vs. +1 252 HP / 0 Def Zamazenta: 162-192 (41.7 - 49.4%) -- guaranteed 3HKO after Leftovers recovery
11
34.442
54.8%
checker faints 8.48%
▾
252+ Atk Unaware Dondozo Wave Crash vs. 252 HP / 0 Def Zamazenta: 160-189 (41.2 - 48.7%) -- guaranteed 3HKO after Leftovers recovery
12
Dragonite
DragonFlying
SOFT CHECK
456.723
53.8%
checker faints 4.01%
▾
252+ Atk Dragonite Fly vs. +1 252 HP / 0 Def Zamazenta: 198-234 (51 - 60.3%) -- 85.2% chance to 2HKO after Leftovers recovery
13
Hatterene
PsychicFairy
SOFT CHECK
257.842
53.0%
checker faints 5.28%
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Zamazenta: 186-218 (47.9 - 56.1%) -- 80.9% chance to 2HKO
14
Toxapex
PoisonWater
SOFT CHECK
335.5
52.8%
checker faints 4.61%
▾
252+ SpA Toxapex Sludge Bomb vs. 252 HP / 252+ SpD Zamazenta: 61-73 (15.7 - 18.8%) -- possible 8HKO
15
Clefable
Fairy
SOFT CHECK
165.254
51.6%
checker faints 6.55%
▾
252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Zamazenta: 182-216 (46.9 - 55.6%) -- 15.2% chance to 2HKO after Leftovers recovery
16
Cresselia
Psychic
SOFT CHECK
70.402
51.3%
checker faints 8.31%
▾
252+ SpA Cresselia Moonblast vs. 252 HP / 252+ SpD Zamazenta: 104-124 (26.8 - 31.9%) -- 37.1% chance to 4HKO after Leftovers recovery
17
Iron Moth
FirePoison
SOFT CHECK
40.965
50.4%
checker faints 7.81%
▾
252+ SpA Iron Moth Psychic vs. 252 HP / 252+ SpD Zamazenta: 150-178 (38.6 - 45.8%) -- guaranteed 3HKO after Leftovers recovery
18
Skarmory
SteelFlying
SOFT CHECK
63.628
45.4%
checker faints 8.67%
▾
0 Def Skarmory Body Press vs. +1 252 HP / 0 Def Zamazenta: 46-55 (11.8 - 14.1%)
19
Iron Hands
FightingElectric
SOFT CHECK
47.222
44.3%
checker faints 10.00%
▾
252+ Atk Iron Hands Close Combat vs. +1 252 HP / 0 Def Zamazenta: 135-160 (34.7 - 41.2%) -- 71% chance to 3HKO after Leftovers recovery
20
Clodsire
PoisonGround
SOFT CHECK
95.918
44.3%
checker faints 6.81%
▾
252+ Atk Unaware Clodsire Earthquake vs. 252 HP / 0 Def Zamazenta: 111-132 (28.6 - 34%) -- 98% chance to 4HKO after Leftovers recovery
21
Zamazenta
Fighting
SOFT CHECK
735.496
44.2%
checker faints 3.12%
▾
252+ Atk Zamazenta Close Combat vs. +1 252 HP / 0 Def Zamazenta: 120-142 (30.9 - 36.5%) -- guaranteed 4HKO after Leftovers recovery
22
Gholdengo
SteelGhost
SOFT CHECK
725.324
44.1%
checker faints 3.14%
▾
252+ SpA Gholdengo Make It Rain vs. 252 HP / 252+ SpD Zamazenta: 144-169 (37.1 - 43.5%) -- 99.7% chance to 3HKO after Leftovers recovery
23
Scizor-Mega
BugSteel
SOFT CHECK
243.768
44.0%
checker faints 5.44%
▾
252+ Atk Scizor-Mega Close Combat vs. +1 252 HP / 0 Def Zamazenta: 95-112 (24.4 - 28.8%) -- possible 5HKO
24
Raging Bolt
ElectricDragon
SOFT CHECK
335.408
42.8%
checker faints 4.64%
▾
252+ SpA Choice Specs Raging Bolt Draco Meteor vs. 252 HP / 252+ SpD Zamazenta: 238-282 (61.3 - 72.6%) -- guaranteed 2HKO after Leftovers recovery
25
Ceruledge
FireGhost
SOFT CHECK
151.417
42.3%
checker faints 6.86%
▾
252+ Atk Ceruledge Poltergeist vs. +1 252 HP / 0 Def Zamazenta: 114-135 (29.3 - 34.7%) -- 99.9% chance to 4HKO after Leftovers recovery
26
Volcarona
BugFire
SOFT CHECK
248.244
42.2%
checker faints 5.11%
▾
252+ SpA Volcarona Psychic vs. 252 HP / 252+ SpD Zamazenta: 146-172 (37.6 - 44.3%) -- guaranteed 3HKO after Leftovers recovery
27
Pecharunt
PoisonGhost
SOFT CHECK
293.738
41.9%
checker faints 4.89%
▾
252+ SpA Pecharunt Malignant Chain vs. 252 HP / 252+ SpD Zamazenta: 91-108 (23.4 - 27.8%) -- possible 5HKO
28
Corviknight
FlyingSteel
SOFT CHECK
292.141
40.0%
checker faints 4.84%
▾
252+ Atk Corviknight Brave Bird vs. +1 252 HP / 0 Def Zamazenta: 194-230 (50 - 59.2%) -- 77% chance to 2HKO after Leftovers recovery
29
Great Tusk
GroundFighting
SOFT CHECK
432.374
37.8%
checker faints 3.94%
▾
252+ Atk Great Tusk Headlong Rush vs. +1 252 HP / 0 Def Zamazenta: 129-153 (33.2 - 39.4%) -- 11.9% chance to 3HKO after Leftovers recovery
30
Swampert-Mega
WaterGround
SOFT CHECK
91.467
37.7%
checker faints 8.74%
▾
252+ Atk Swampert-Mega Earthquake vs. +1 252 HP / 0 Def Zamazenta: 118-141 (30.4 - 36.3%) -- guaranteed 4HKO after Leftovers recovery
Ranked #2 with 20.76% usage. Sorted by reliability score.