Observed target KO or switch rate is upstream p: the fraction of relevant encounters where the target was knocked out or switched out. Standard error is upstream d. The conservative score is p − 4d. These ladder observations do not prove a set-specific counter.
How to read this table
Use encounter count and standard error to judge the sample. Damage estimates below use inferred sets and remain separate from the observed ladder metric.
#
Checker
Encounters
Conservative score
Target KO or switch rate
01
Arceus-Ground
Ground
DEFENSIVE CHECK
View matchup
300.696
89.2%
Standard error 2.98 points
▾
252+ Atk Iron Treads Ice Spinner vs. 252 HP / 252+ Def Arceus-Ground: 112-132 (25.2 - 29.7%) -- guaranteed 4HKO
02
Dondozo
Water
DEFENSIVE CHECK
View matchup
20.328
94.8%
Standard error 4.91 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Dondozo: 106-126 (21 - 25%) -- possible 5HKO
03
Koraidon
FightingDragon
OFFENSIVE CHECK
View matchup
556.596
81.6%
Standard error 2.82 points
▾
252+ Atk Orichalcum Pulse Koraidon Collision Course (133.3251953125 BP) vs. 252 HP / 0 Def Iron Treads: 560-660 (145.8 - 171.8%) -- guaranteed OHKO
04
Corviknight
FlyingSteel
DEFENSIVE CHECK
View matchup
128.285
85.6%
Standard error 5.17 points
▾
0- SpA Iron Treads Volt Switch vs. 252 HP / 0 SpD Corviknight: 80-96 (20 - 24%) -- possible 6HKO
05
Calyrex-Ice
PsychicIce
DEFENSIVE CHECK
View matchup
60.968
82.6%
Standard error 6.32 points
▾
252+ Atk Iron Treads Iron Head vs. 252 HP / 252+ Def Calyrex-Ice: 140-168 (34.6 - 41.5%) -- guaranteed 3HKO
06
Kyogre
Water
DEFENSIVE CHECK
View matchup
85.541
80.2%
Standard error 6.08 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Kyogre: 126-148 (31.1 - 36.6%) -- 72.5% chance to 3HKO
07
Ting-Lu
DarkGround
DEFENSIVE CHECK
View matchup
206.22
74.8%
Standard error 5.16 points
▾
252+ Atk Iron Treads Ice Spinner vs. 252 HP / 252+ Def Ting-Lu: 108-128 (21 - 24.9%) -- possible 6HKO
08
Arceus
Normal
DEFENSIVE CHECK
View matchup
297.804
68.1%
Standard error 4.48 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Arceus: 103-123 (23.1 - 27.7%) -- 73.7% chance to 4HKO
09
Ho-Oh
FireFlying
DEFENSIVE CHECK
View matchup
469.021
64.7%
Standard error 3.78 points
▾
252+ Atk Iron Treads Knock Off (97.5 BP) vs. 252 HP / 252+ Def Ho-Oh: 81-96 (19.4 - 23%) -- possible 5HKO
10
Calyrex-Shadow
PsychicGhost
OFFENSIVE CHECK
View matchup
692.333
61.0%
Standard error 3.17 points
▾
252+ SpA Calyrex-Shadow Astral Barrage vs. 252 HP / 252+ SpD Iron Treads: 232-274 (60.4 - 71.3%) -- guaranteed 2HKO after Leftovers recovery
11
Gliscor
GroundFlying
DEFENSIVE CHECK
View matchup
363.067
65.1%
Standard error 4.25 points
▾
252+ Atk Iron Treads Ice Spinner vs. 252 HP / 252+ Def Gliscor: 216-256 (61 - 72.3%) -- guaranteed 2HKO
12
Chien-Pao
DarkIce
OFFENSIVE CHECK
View matchup
21.564
76.8%
Standard error 9.10 points
▾
252+ Atk Sword of Ruin Chien-Pao Sacred Sword vs. 252 HP / 0 Def Iron Treads: 232-274 (60.4 - 71.3%) -- guaranteed 2HKO after Leftovers recovery
13
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
View matchup
131.51
64.0%
Standard error 7.21 points
▾
+1 252+ Atk Zacian-Crowned Close Combat vs. 252 HP / 0 Def Iron Treads: 408-482 (106.2 - 125.5%) -- guaranteed OHKO
14
Skeledirge
FireGhost
DEFENSIVE CHECK
View matchup
162.667
59.9%
Standard error 6.46 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Skeledirge: 234-276 (56.7 - 66.9%) -- guaranteed 2HKO
15
Terapagos
Normal
DEFENSIVE CHECK
View matchup
22.598
68.7%
Standard error 9.76 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Terapagos: 130-154 (33.8 - 40.1%) -- 29.2% chance to 3HKO after Leftovers recovery
16
Arceus-Fairy
Fairy
DEFENSIVE CHECK
View matchup
103.937
60.1%
Standard error 8.24 points
▾
252+ Atk Iron Treads Iron Head vs. 252 HP / 252+ Def Arceus-Fairy: 168-198 (37.8 - 44.5%) -- guaranteed 3HKO
17
Smeargle
Normal
SOFT CHECK
View matchup
233.471
47.9%
Standard error 5.64 points
▾
18
Lunala
PsychicGhost
OFFENSIVE CHECK
View matchup
28.036
61.7%
Standard error 9.18 points
▾
252+ SpA Lunala Moongeist Beam vs. 252 HP / 252+ SpD Iron Treads: 169-199 (44 - 51.8%) -- guaranteed 3HKO after Leftovers recovery
19
Miraidon
ElectricDragon
SOFT CHECK
View matchup
847.498
35.6%
Standard error 2.82 points
▾
252+ SpA Hadron Engine Miraidon Overheat vs. 252 HP / 252+ SpD Iron Treads: 384-454 (100 - 118.2%) -- guaranteed OHKO
20
Grafaiai
PoisonNormal
OFFENSIVE CHECK
View matchup
24.792
62.4%
Standard error 9.73 points
▾
252+ Atk Grafaiai Low Kick (120 BP) vs. 252 HP / 0 Def Iron Treads: 198-234 (51.5 - 60.9%) -- 93.4% chance to 2HKO after Leftovers recovery
21
Iron Treads
GroundSteel
SOFT CHECK
View matchup
172.61
48.5%
Standard error 6.50 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 0 Def Iron Treads: 278-330 (72.3 - 85.9%) -- guaranteed 2HKO after Leftovers recovery
22
Kingambit
DarkSteel
DEFENSIVE CHECK
View matchup
51.556
56.8%
Standard error 9.73 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Kingambit: 206-246 (50.9 - 60.8%) -- guaranteed 2HKO
23
Ditto
Normal
SOFT CHECK
View matchup
152.13
44.2%
Standard error 6.75 points
▾
Ditto vs. Iron Treads: 0-0 (0 - 0%)
24
Alomomola
Water
SOFT CHECK
View matchup
199.781
40.5%
Standard error 5.84 points
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 0 Def Iron Treads: 128-152 (33.3 - 39.5%) -- 13.9% chance to 3HKO after Leftovers recovery
25
Wo-Chien
DarkGrass
DEFENSIVE CHECK
View matchup
20.757
59.6%
Standard error 10.77 points
▾
252+ Atk Iron Treads Ice Spinner vs. 252 HP / 252+ Def Tablets of Ruin Wo-Chien: 94-112 (25.1 - 29.9%) -- 0.1% chance to 4HKO after Leftovers recovery
26
Glimmora
RockPoison
SOFT CHECK
View matchup
330.373
23.4%
Standard error 3.94 points
▾
0- SpA Glimmora Mud Shot vs. 252 HP / 252+ SpD Iron Treads: 80-96 (20.8 - 25%) -- possible 5HKO
27
Flutter Mane
GhostFairy
SOFT CHECK
View matchup
110.397
38.3%
Standard error 8.00 points
▾
252+ SpA Flutter Mane Mystical Fire vs. 252 HP / 252+ SpD Iron Treads: 168-198 (43.7 - 51.5%) -- guaranteed 3HKO after Leftovers recovery
28
Eternatus
PoisonDragon
SOFT CHECK
View matchup
99.011
38.8%
Standard error 8.28 points
▾
252+ SpA Eternatus Fire Blast vs. 252 HP / 252+ SpD Iron Treads: 258-304 (67.1 - 79.1%) -- guaranteed 2HKO after Leftovers recovery
29
Ribombee
BugFairy
SOFT CHECK
View matchup
143.954
15.8%
Standard error 4.12 points
▾
252+ SpA Ribombee Moonblast vs. 252 HP / 252+ SpD Iron Treads: 62-73 (16.1 - 19%) -- possible 8HKO
30
Incineroar
FireDark
SOFT CHECK
View matchup
56.652
33.1%
Standard error 8.70 points
▾
252+ Atk Incineroar Drain Punch vs. 252 HP / 0 Def Iron Treads: 142-168 (36.9 - 43.7%) -- 99.7% chance to 3HKO after Leftovers recovery
Ranked #12 with 11.15% usage. Sorted by conservative score.