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
Dondozo
Water
DEFENSIVE COUNTER
484.529
80.2%
checker faints 2.99%
▾
252+ Atk Zacian-Crowned Wild Charge vs. 252 HP / 252+ Def Unaware Dondozo: 158-186 (31.3 - 36.9%) -- 73.5% chance to 3HKO
02
Skeledirge
FireGhost
DEFENSIVE COUNTER
642.803
80.1%
checker faints 2.60%
▾
252+ Atk Zacian-Crowned Crunch vs. 252 HP / 252+ Def Unaware Skeledirge: 154-182 (37.3 - 44.1%) -- guaranteed 3HKO
03
Arceus-Fire
Fire
DEFENSIVE COUNTER
21.192
79.5%
checker faints 8.77%
▾
+1 252+ Atk Zacian-Crowned Close Combat vs. 252 HP / 252+ Def Arceus-Fire: 153-180 (34.4 - 40.5%) -- guaranteed 3HKO
04
Ditto
Normal
DEFENSIVE COUNTER
390.029
71.7%
checker faints 3.70%
▾
+1 252+ Atk Zacian-Crowned Close Combat vs. 252 HP / 252+ Def Ditto: 528-622 (176 - 207.3%) -- guaranteed OHKO
05
Calyrex-Ice
PsychicIce
DEFENSIVE COUNTER
873.538
64.8%
checker faints 2.79%
▾
+1 252+ Atk Zacian-Crowned Iron Head vs. 252 HP / 252+ Def Calyrex-Ice: 258-306 (63.8 - 75.7%) -- guaranteed 2HKO
06
Arceus-Ground
Ground
DEFENSIVE COUNTER
619.436
64.2%
checker faints 3.27%
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 252+ Def Arceus-Ground: 171-202 (38.5 - 45.4%) -- guaranteed 3HKO
07
Necrozma-Dusk-Mane
PsychicSteel
OFFENSIVE CHECK
2,085.992
62.4%
checker faints 1.82%
▾
0- Atk Necrozma-Dusk-Mane Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 170-202 (43.8 - 52%) -- 11.7% chance to 2HKO
08
Koraidon
FightingDragon
OFFENSIVE CHECK
4,166.633
56.4%
checker faints 1.31%
▾
252+ Atk Orichalcum Pulse Koraidon Flare Blitz vs. 252 HP / 0 Def Zacian-Crowned in Sun: 524-618 (135 - 159.2%) -- guaranteed OHKO
09
Arceus-Electric
Electric
DEFENSIVE COUNTER
258.589
56.2%
checker faints 5.31%
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 252+ Def Arceus-Electric: 171-202 (38.5 - 45.4%) -- guaranteed 3HKO
10
Landorus-Therian
GroundFlying
OFFENSIVE CHECK
913.727
55.9%
checker faints 2.79%
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 344-408 (88.6 - 105.1%) -- 31.3% chance to OHKO
11
Groudon
Ground
DEFENSIVE COUNTER
518.508
55.8%
checker faints 3.69%
▾
+1 252+ Atk Zacian-Crowned Play Rough vs. 252 HP / 252+ Def Groudon: 153-181 (37.8 - 44.8%) -- guaranteed 3HKO after Leftovers recovery
12
Ursaluna
GroundNormal
SOFT CHECK
138.136
54.6%
checker faints 7.31%
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Zacian-Crowned: 404-476 (104.1 - 122.6%) -- guaranteed OHKO
13
Great Tusk
GroundFighting
SOFT CHECK
38.164
50.7%
checker faints 8.09%
▾
252+ Atk Great Tusk Headlong Rush vs. 252 HP / 0 Def Zacian-Crowned: 386-456 (99.4 - 117.5%) -- 93.8% chance to OHKO
14
Zacian-Crowned
FairySteel
SOFT CHECK
1,807.886
49.8%
checker faints 2.01%
▾
+1 252+ Atk Zacian-Crowned Iron Head vs. 252 HP / 0 Def Zacian-Crowned: 211-250 (54.3 - 64.4%) -- guaranteed 2HKO
15
Kingambit
DarkSteel
SOFT CHECK
493.686
45.9%
checker faints 3.75%
▾
252+ Atk Kingambit Iron Head vs. 252 HP / 0 Def Zacian-Crowned: 132-156 (34 - 40.2%) -- guaranteed 3HKO
16
Rayquaza
DragonFlying
SOFT CHECK
154.934
44.7%
checker faints 6.76%
▾
252+ Atk Rayquaza Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 238-280 (61.3 - 72.1%) -- guaranteed 2HKO
17
Regieleki
Electric
SOFT CHECK
34.477
43.6%
checker faints 8.44%
▾
252+ SpA Transistor Regieleki Thunderbolt vs. 252 HP / 252+ SpD Zacian-Crowned: 115-136 (29.6 - 35%) -- 16.5% chance to 3HKO
18
Zekrom
DragonElectric
SOFT CHECK
32.1
42.1%
checker faints 8.72%
▾
252+ Atk Life Orb Zekrom Bolt Strike vs. 252 HP / 0 Def Zacian-Crowned: 298-352 (76.8 - 90.7%) -- guaranteed 2HKO
19
Ho-Oh
FireFlying
SOFT CHECK
2,424.319
42.0%
checker faints 1.71%
▾
252+ Atk Ho-Oh Flare Blitz vs. 252 HP / 0 Def Zacian-Crowned: 384-452 (98.9 - 116.4%) -- 87.5% chance to OHKO
20
1,679.552
40.4%
checker faints 2.04%
▾
252+ Atk Arceus Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 202-238 (52 - 61.3%) -- guaranteed 2HKO
21
Deoxys-Attack
Psychic
SOFT CHECK
261.397
40.1%
checker faints 5.21%
▾
0- Atk Deoxys-Attack Low Kick (120 BP) vs. 252 HP / 0 Def Zacian-Crowned: 115-136 (29.6 - 35%) -- 15.4% chance to 3HKO
22
2,082.988
38.9%
checker faints 1.84%
▾
252+ SpA Choice Specs Kyogre Water Spout (150 BP) vs. 252 HP / 252+ SpD Zacian-Crowned in Rain: 441-519 (113.6 - 133.7%) -- guaranteed OHKO
23
Skarmory
SteelFlying
SOFT CHECK
36.409
38.9%
checker faints 8.08%
▾
0 Def Skarmory Body Press vs. 252 HP / 0 Def Zacian-Crowned: 68-81 (17.5 - 20.8%) -- possible 5HKO
24
Kyurem-Black
DragonIce
SOFT CHECK
160.082
38.7%
checker faints 6.62%
▾
252+ Atk Kyurem-Black Fusion Bolt vs. 252 HP / 0 Def Zacian-Crowned: 130-154 (33.5 - 39.6%) -- guaranteed 3HKO
25
Arceus-Water
Water
SOFT CHECK
437.066
37.4%
checker faints 3.98%
▾
252+ SpA Splash Plate Arceus-Water Judgment vs. 252 HP / 252+ SpD Zacian-Crowned: 133-157 (34.2 - 40.4%) -- guaranteed 3HKO
26
Lunala
PsychicGhost
SOFT CHECK
1,516.976
37.0%
checker faints 2.12%
▾
252+ SpA Lunala Moongeist Beam vs. 252 HP / 252+ SpD Zacian-Crowned: 123-145 (31.7 - 37.3%) -- 88.4% chance to 3HKO
27
Palkia
WaterDragon
SOFT CHECK
48.821
36.3%
checker faints 6.88%
▾
252+ SpA Palkia Fire Blast vs. 252 HP / 252+ SpD Zacian-Crowned: 192-228 (49.4 - 58.7%) -- 99.6% chance to 2HKO
28
Garganacl
Rock
SOFT CHECK
50.982
35.8%
checker faints 9.41%
▾
252+ Atk Garganacl Earthquake vs. 252 HP / 0 Def Zacian-Crowned: 178-210 (45.8 - 54.1%) -- 47.7% chance to 2HKO
29
Arceus-Ghost
Ghost
SOFT CHECK
268.15
34.6%
checker faints 4.90%
▾
252+ SpA Spooky Plate Arceus-Ghost Judgment vs. 252 HP / 252+ SpD Zacian-Crowned: 133-157 (34.2 - 40.4%) -- guaranteed 3HKO
30
Eternatus
PoisonDragon
SOFT CHECK
1,237.98
34.4%
checker faints 2.30%
▾
252+ SpA Eternatus Fire Blast vs. 252 HP / 252+ SpD Zacian-Crowned: 188-222 (48.4 - 57.2%) -- 91.8% chance to 2HKO
Ranked #3 with 43.91% usage. Sorted by reliability score.