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
Ogerpon-Wellspring
GrassWater
OFFENSIVE CHECK
View matchup
276.482
88.2%
Standard error 3.33 points
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Ivy Cudgel vs. 252 HP / 0 Def Iron Treads: 348-410 (90.6 - 106.7%) -- 43.8% chance to OHKO
02
Great Tusk
GroundFighting
DEFENSIVE CHECK
View matchup
295.258
82.4%
Standard error 3.73 points
▾
0- SpA Iron Treads Steel Beam vs. 252 HP / 0 SpD Great Tusk: 172-204 (39.6 - 47%) -- guaranteed 3HKO
03
Sableye-Mega
DarkGhost
DEFENSIVE CHECK
View matchup
62.394
88.9%
Standard error 5.58 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Sableye-Mega: 100-118 (32.8 - 38.8%) -- 99.2% chance to 3HKO
04
Zamazenta
Fighting
OFFENSIVE CHECK
View matchup
248.832
79.1%
Standard error 4.38 points
▾
252+ Atk Zamazenta Close Combat vs. 252 HP / 0 Def Iron Treads: 348-410 (90.6 - 106.7%) -- 43.8% chance to OHKO
05
Rotom-Heat
ElectricFire
OFFENSIVE CHECK
View matchup
25.513
87.5%
Standard error 6.55 points
▾
252+ SpA Rotom-Heat Overheat vs. 252 HP / 252+ SpD Iron Treads: 362-428 (94.2 - 111.4%) -- 68.8% chance to OHKO
06
Charizard-Mega-X
FireDragon
OFFENSIVE CHECK
View matchup
113.147
81.8%
Standard error 6.24 points
▾
252+ Atk Tough Claws Charizard-Mega-X Flare Blitz vs. 252 HP / 0 Def Iron Treads: 480-566 (125 - 147.3%) -- guaranteed OHKO
07
Corviknight
FlyingSteel
DEFENSIVE CHECK
View matchup
256.577
74.6%
Standard error 4.63 points
▾
252+ Atk Iron Treads Knock Off (97.5 BP) vs. 252 HP / 252+ Def Corviknight: 73-87 (18.2 - 21.7%) -- possible 5HKO
08
Iron Valiant
FairyFighting
OFFENSIVE CHECK
View matchup
143.038
77.0%
Standard error 6.06 points
▾
252+ Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Iron Treads: 368-434 (95.8 - 113%) -- 75% chance to OHKO
09
Venusaur-Mega
GrassPoison
DEFENSIVE CHECK
View matchup
105.437
77.9%
Standard error 6.53 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Venusaur-Mega: 102-120 (28 - 32.9%) -- guaranteed 4HKO
10
Terapagos
Normal
DEFENSIVE CHECK
View matchup
222.458
72.2%
Standard error 5.13 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Terapagos: 130-154 (33.8 - 40.1%) -- guaranteed 3HKO
11
Charizard-Mega-Y
FireFlying
OFFENSIVE CHECK
View matchup
108.48
78.3%
Standard error 6.72 points
▾
252+ SpA Charizard-Mega-Y Overheat vs. 252 HP / 252+ SpD Iron Treads in Sun: 732-864 (190.6 - 225%) -- guaranteed OHKO
12
Ursaluna
GroundNormal
OFFENSIVE CHECK
View matchup
85.614
73.7%
Standard error 6.60 points
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Iron Treads: 390-458 (101.5 - 119.2%) -- guaranteed OHKO
13
Ferrothorn
GrassSteel
DEFENSIVE CHECK
View matchup
103.883
75.7%
Standard error 7.26 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Ferrothorn: 97-115 (27.5 - 32.6%) -- 70.4% chance to 4HKO after Leftovers recovery
14
Urshifu-Rapid-Strike
FightingWater
OFFENSIVE CHECK
View matchup
152.575
70.5%
Standard error 6.24 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Iron Treads: 368-434 (95.8 - 113%) -- 75% chance to OHKO
15
Ceruledge
FireGhost
OFFENSIVE CHECK
View matchup
25.972
77.0%
Standard error 8.26 points
▾
252+ Atk Ceruledge Bitter Blade vs. 252 HP / 0 Def Iron Treads: 270-318 (70.3 - 82.8%) -- guaranteed 2HKO after Leftovers recovery
16
Skarmory
SteelFlying
DEFENSIVE CHECK
View matchup
37.787
72.8%
Standard error 7.24 points
▾
0- SpA Iron Treads Steel Beam vs. 252 HP / 0 SpD Skarmory: 69-82 (20.6 - 24.5%) -- guaranteed 5HKO
17
Latios-Mega
DragonPsychic
OFFENSIVE CHECK
View matchup
97.497
72.1%
Standard error 7.51 points
▾
252+ SpA Latios-Mega Aura Sphere vs. 252 HP / 252+ SpD Iron Treads: 202-238 (52.6 - 61.9%) -- 98.8% chance to 2HKO after Leftovers recovery
18
Volcarona
BugFire
OFFENSIVE CHECK
View matchup
65.105
72.0%
Standard error 7.81 points
▾
252+ SpA Volcarona Flamethrower vs. 252 HP / 252+ SpD Iron Treads: 300-354 (78.1 - 92.1%) -- guaranteed 2HKO after Leftovers recovery
19
Zapdos
ElectricFlying
OFFENSIVE CHECK
View matchup
362.698
57.6%
Standard error 4.45 points
▾
252+ SpA Zapdos Heat Wave vs. 252 HP / 252+ SpD Iron Treads: 200-236 (52 - 61.4%) -- 96.1% chance to 2HKO after Leftovers recovery
20
Samurott-Hisui
WaterDark
OFFENSIVE CHECK
View matchup
70.818
70.2%
Standard error 7.64 points
▾
252+ Atk Sharpness Samurott-Hisui Razor Shell vs. 252 HP / 0 Def Iron Treads: 302-356 (78.6 - 92.7%) -- guaranteed 2HKO after Leftovers recovery
21
Kyurem
DragonIce
OFFENSIVE CHECK
View matchup
112.929
67.8%
Standard error 7.47 points
▾
252+ SpA Kyurem Earth Power vs. 252 HP / 252+ SpD Iron Treads: 194-230 (50.5 - 59.8%) -- 84.4% chance to 2HKO after Leftovers recovery
22
Ting-Lu
DarkGround
DEFENSIVE CHECK
View matchup
163.578
61.6%
Standard error 6.47 points
▾
252+ Atk Iron Treads Ice Spinner vs. 252 HP / 252+ Def Ting-Lu: 108-128 (21 - 24.9%) -- possible 6HKO
23
Gengar
GhostPoison
OFFENSIVE CHECK
View matchup
22.972
72.4%
Standard error 9.33 points
▾
252+ SpA Gengar Focus Blast vs. 252 HP / 252+ SpD Iron Treads: 260-306 (67.7 - 79.6%) -- guaranteed 2HKO after Leftovers recovery
24
Moltres
FireFlying
OFFENSIVE CHECK
View matchup
102.859
65.4%
Standard error 7.85 points
▾
252+ SpA Moltres Flamethrower vs. 252 HP / 252+ SpD Iron Treads: 284-336 (73.9 - 87.5%) -- guaranteed 2HKO after Leftovers recovery
25
Tornadus-Therian
Flying
OFFENSIVE CHECK
View matchup
105.132
58.5%
Standard error 6.74 points
▾
252+ SpA Tornadus-Therian Focus Blast vs. 252 HP / 252+ SpD Iron Treads: 230-272 (59.8 - 70.8%) -- guaranteed 2HKO after Leftovers recovery
26
Scizor-Mega
BugSteel
OFFENSIVE CHECK
View matchup
96.808
59.1%
Standard error 6.98 points
▾
252+ Atk Scizor-Mega Close Combat vs. 252 HP / 0 Def Iron Treads: 272-322 (70.8 - 83.8%) -- guaranteed 2HKO after Leftovers recovery
27
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
344.688
48.2%
Standard error 4.58 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Iron Treads: 332-392 (86.4 - 102%) -- 18.8% chance to OHKO
28
Keldeo
WaterFighting
OFFENSIVE CHECK
View matchup
96.832
61.8%
Standard error 8.44 points
▾
252+ SpA Keldeo Hydro Pump vs. 252 HP / 252+ SpD Iron Treads: 356-420 (92.7 - 109.3%) -- 56.3% chance to OHKO
29
Kingambit
DarkSteel
SOFT CHECK
View matchup
165.085
53.9%
Standard error 6.64 points
▾
252+ Atk Kingambit Low Kick (120 BP) vs. 252 HP / 0 Def Iron Treads: 252-298 (65.6 - 77.6%) -- guaranteed 2HKO after Leftovers recovery
30
Garchomp
DragonGround
SOFT CHECK
View matchup
165.448
48.7%
Standard error 6.65 points
▾
252+ Atk Garchomp Earthquake vs. 252 HP / 0 Def Iron Treads: 306-362 (79.6 - 94.2%) -- guaranteed 2HKO after Leftovers recovery
Ranked #13 with 11.76% usage. Sorted by conservative score.