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
Scizor-Mega
BugSteel
OFFENSIVE CHECK
View matchup
167.114
76.7%
Standard error 5.55 points
▾
252+ Atk Technician Scizor-Mega Bullet Punch vs. 252 HP / 0 Def Iron Valiant: 264-312 (75 - 88.6%) -- guaranteed 2HKO
02
Venusaur-Mega
GrassPoison
DEFENSIVE CHECK
View matchup
108.286
73.6%
Standard error 7.22 points
▾
252+ Atk Iron Valiant Close Combat vs. 252 HP / 252+ Def Venusaur-Mega: 67-79 (18.4 - 21.7%) -- possible 5HKO
03
Gholdengo
SteelGhost
OFFENSIVE CHECK
View matchup
306.141
61.8%
Standard error 4.74 points
▾
252+ SpA Gholdengo Make It Rain vs. 252 HP / 252+ SpD Iron Valiant: 432-510 (122.7 - 144.8%) -- guaranteed OHKO
04
Volcarona
BugFire
OFFENSIVE CHECK
View matchup
131.642
67.3%
Standard error 6.87 points
▾
252+ SpA Volcarona Psychic vs. 252 HP / 252+ SpD Iron Valiant: 218-258 (61.9 - 73.2%) -- guaranteed 2HKO
05
Clefable
Fairy
DEFENSIVE CHECK
View matchup
56.358
72.3%
Standard error 8.41 points
▾
252+ Atk Iron Valiant Spirit Break vs. 252 HP / 252+ Def Clefable: 118-141 (29.9 - 35.7%) -- guaranteed 4HKO after Leftovers recovery
06
Tapu Lele
PsychicFairy
OFFENSIVE CHECK
View matchup
118.962
55.2%
Standard error 7.82 points
▾
252+ SpA Tapu Lele Future Sight vs. 252 HP / 252+ SpD Iron Valiant in Psychic Terrain: 552-650 (156.8 - 184.6%) -- guaranteed OHKO
07
Raging Bolt
ElectricDragon
SOFT CHECK
View matchup
181.584
49.5%
Standard error 6.39 points
▾
252+ SpA Choice Specs Raging Bolt Thunderbolt vs. 252 HP / 252+ SpD Iron Valiant: 247-292 (70.1 - 82.9%) -- guaranteed 2HKO
08
Pecharunt
PoisonGhost
SOFT CHECK
View matchup
106.577
54.1%
Standard error 8.28 points
▾
252+ SpA Pecharunt Malignant Chain vs. 252 HP / 252+ SpD Iron Valiant: 270-320 (76.7 - 90.9%) -- guaranteed 2HKO
09
Iron Valiant
FairyFighting
SOFT CHECK
View matchup
96.482
48.3%
Standard error 7.14 points
▾
252+ Atk Iron Valiant Spirit Break vs. 252 HP / 0 Def Iron Valiant: 294-348 (83.5 - 98.8%) -- guaranteed 2HKO
10
Tornadus-Therian
Flying
SOFT CHECK
View matchup
119.715
50.7%
Standard error 7.76 points
▾
252+ SpA Tornadus-Therian Hurricane vs. 252 HP / 252+ SpD Iron Valiant: 344-408 (97.7 - 115.9%) -- 87.5% chance to OHKO
11
Clodsire
PoisonGround
SOFT CHECK
View matchup
73.207
51.5%
Standard error 8.17 points
▾
252+ Atk Clodsire Poison Jab vs. 252 HP / 0 Def Iron Valiant: 218-258 (61.9 - 73.2%) -- guaranteed 2HKO
12
Zamazenta
Fighting
SOFT CHECK
View matchup
339.992
36.4%
Standard error 4.46 points
▾
252+ Atk Zamazenta Heavy Slam (120 BP) vs. 252 HP / 0 Def Iron Valiant: 296-350 (84 - 99.4%) -- guaranteed 2HKO
13
Toxapex
PoisonWater
SOFT CHECK
View matchup
198.396
41.9%
Standard error 6.02 points
▾
252+ SpA Toxapex Sludge Bomb vs. 252 HP / 252+ SpD Iron Valiant: 182-216 (51.7 - 61.3%) -- guaranteed 2HKO
14
Dragonite
DragonFlying
SOFT CHECK
View matchup
170.339
40.9%
Standard error 6.42 points
▾
252+ Atk Dragonite Fly vs. 252 HP / 0 Def Iron Valiant: 362-428 (102.8 - 121.5%) -- guaranteed OHKO
15
Rillaboom
Grass
OFFENSIVE CHECK
View matchup
20.78
58.4%
Standard error 10.81 points
▾
252+ Atk Choice Band Rillaboom Wood Hammer vs. 252 HP / 0 Def Iron Valiant in Grassy Terrain: 445-525 (126.4 - 149.1%) -- guaranteed OHKO
16
Slowking-Galar
PoisonPsychic
SOFT CHECK
View matchup
170.601
38.9%
Standard error 6.43 points
▾
252+ SpA Slowking-Galar Future Sight vs. 252 HP / 252+ SpD Iron Valiant: 378-446 (107.3 - 126.7%) -- guaranteed OHKO
17
Terapagos
Normal
SOFT CHECK
View matchup
190.248
35.3%
Standard error 5.96 points
▾
0- SpA Terapagos Tera Starstorm vs. 252 HP / 252+ SpD Iron Valiant: 81-96 (23 - 27.2%) -- 51.2% chance to 4HKO
18
Ceruledge
FireGhost
SOFT CHECK
View matchup
29.064
48.4%
Standard error 9.27 points
▾
252+ Atk Ceruledge Poltergeist vs. 252 HP / 0 Def Iron Valiant: 210-247 (59.6 - 70.1%) -- guaranteed 2HKO
19
Hatterene
PsychicFairy
SOFT CHECK
View matchup
58.312
47.8%
Standard error 9.18 points
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Iron Valiant: 276-326 (78.4 - 92.6%) -- guaranteed 2HKO
20
Gliscor
GroundFlying
SOFT CHECK
View matchup
237.975
31.6%
Standard error 5.19 points
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Iron Valiant: 159-187 (45.1 - 53.1%) -- 32% chance to 2HKO
21
Lopunny-Mega
NormalFighting
SOFT CHECK
View matchup
111.563
42.9%
Standard error 8.08 points
▾
252+ Atk Lopunny-Mega Return vs. 252 HP / 0 Def Iron Valiant: 207-244 (58.8 - 69.3%) -- guaranteed 2HKO
22
Slowbro-Galar
PoisonPsychic
SOFT CHECK
22.12
52.9%
Standard error 10.61 points
23
Charizard-Mega-X
FireDragon
SOFT CHECK
View matchup
100.079
42.2%
Standard error 8.46 points
▾
252+ Atk Tough Claws Charizard-Mega-X Flare Blitz vs. 252 HP / 0 Def Iron Valiant: 306-361 (86.9 - 102.5%) -- 18.8% chance to OHKO
24
Melmetal
Steel
SOFT CHECK
View matchup
66.131
40.3%
Standard error 8.41 points
▾
252+ Atk Punching Glove Iron Fist Melmetal Double Iron Bash (2 hits) vs. 252 HP / 0 Def Iron Valiant: 664-784 (188.6 - 222.7%) -- guaranteed OHKO
25
Zapdos
ElectricFlying
SOFT CHECK
View matchup
164.621
29.9%
Standard error 5.87 points
▾
252+ SpA Zapdos Hurricane vs. 252 HP / 252+ SpD Iron Valiant: 378-446 (107.3 - 126.7%) -- guaranteed OHKO
26
Charizard-Mega-Y
FireFlying
SOFT CHECK
View matchup
62.935
38.5%
Standard error 8.64 points
▾
252+ SpA Charizard-Mega-Y Overheat vs. 252 HP / 252+ SpD Iron Valiant in Sun: 400-472 (113.6 - 134%) -- guaranteed OHKO
27
Corviknight
FlyingSteel
SOFT CHECK
View matchup
169.687
26.7%
Standard error 5.87 points
▾
252+ Atk Corviknight Brave Bird vs. 252 HP / 0 Def Iron Valiant: 360-426 (102.2 - 121%) -- guaranteed OHKO
28
Alomomola
Water
SOFT CHECK
View matchup
437.627
14.2%
Standard error 2.81 points
▾
252+ Atk Alomomola Play Rough vs. 252 HP / 0 Def Iron Valiant: 164-194 (46.5 - 55.1%) -- 69.5% chance to 2HKO
29
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
235.254
20.8%
Standard error 4.51 points
▾
252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Iron Valiant: 354-417 (100.5 - 118.4%) -- guaranteed OHKO
30
Kingambit
DarkSteel
SOFT CHECK
View matchup
255.578
18.4%
Standard error 4.11 points
▾
252+ Atk Kingambit Iron Head vs. 252 HP / 0 Def Iron Valiant: 324-384 (92 - 109%) -- 50% chance to OHKO
Ranked #16 with 10.18% usage. Sorted by conservative score.