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
154.801
86.2%
Standard error 2.77 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
173.368
81.7%
Standard error 2.94 points
▾
252+ Atk Iron Treads Ice Spinner vs. 252 HP / 252+ Def Great Tusk: 104-124 (23.9 - 28.5%) -- 97% chance to 4HKO
03
Sableye-Mega
DarkGhost
DEFENSIVE CHECK
View matchup
75.78
83.7%
Standard error 4.24 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
132.8
80.2%
Standard error 3.46 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
Venusaur-Mega
GrassPoison
DEFENSIVE CHECK
View matchup
21.756
90.2%
Standard error 6.39 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Venusaur-Mega: 102-120 (28 - 32.9%) -- guaranteed 4HKO
06
Charizard-Mega-Y
FireFlying
OFFENSIVE CHECK
View matchup
75.66
80.2%
Standard error 4.58 points
▾
252+ SpA Charizard-Mega-Y Overheat vs. 252 HP / 252+ SpD Iron Treads in Sun: 732-864 (190.6 - 225%) -- guaranteed OHKO
07
Terapagos
Normal
DEFENSIVE CHECK
View matchup
150.789
74.4%
Standard error 3.55 points
▾
252+ Atk Iron Treads Earthquake vs. 252 HP / 252+ Def Terapagos: 130-154 (33.8 - 40.1%) -- guaranteed 3HKO
08
Corviknight
FlyingSteel
DEFENSIVE CHECK
View matchup
194.028
71.5%
Standard error 3.24 points
▾
0- SpA Iron Treads Volt Switch vs. 252 HP / 0 SpD Corviknight: 80-96 (20 - 24%) -- guaranteed 5HKO
09
Urshifu-Rapid-Strike
FightingWater
OFFENSIVE CHECK
View matchup
105.471
75.3%
Standard error 4.20 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Iron Treads: 368-434 (95.8 - 113%) -- 75% chance to OHKO
10
Kyurem
DragonIce
OFFENSIVE CHECK
View matchup
76.902
77.5%
Standard error 4.76 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
11
Iron Valiant
FairyFighting
OFFENSIVE CHECK
View matchup
65.441
77.0%
Standard error 5.20 points
▾
0- Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Iron Treads: 252-296 (65.6 - 77%) -- guaranteed 2HKO after Leftovers recovery
12
Ferrothorn
GrassSteel
DEFENSIVE CHECK
View matchup
73.389
73.0%
Standard error 5.18 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
13
Lopunny-Mega
NormalFighting
OFFENSIVE CHECK
View matchup
45.722
75.6%
Standard error 6.35 points
▾
252+ Atk Lopunny-Mega Close Combat vs. 252 HP / 0 Def Iron Treads: 384-452 (100 - 117.7%) -- guaranteed OHKO
14
Charizard-Mega-X
FireDragon
OFFENSIVE CHECK
View matchup
55.852
73.0%
Standard error 5.94 points
▾
252+ Atk Tough Claws Charizard-Mega-X Flare Blitz vs. 252 HP / 0 Def Iron Treads: 480-566 (125 - 147.3%) -- guaranteed OHKO
15
Zapdos
ElectricFlying
OFFENSIVE CHECK
View matchup
213.265
59.4%
Standard error 3.36 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
16
Latios-Mega
DragonPsychic
OFFENSIVE CHECK
View matchup
21.864
74.8%
Standard error 9.29 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
17
Ting-Lu
DarkGround
DEFENSIVE CHECK
View matchup
108.9
55.7%
Standard error 4.76 points
▾
252+ Atk Iron Treads Ice Spinner vs. 252 HP / 252+ Def Ting-Lu: 108-128 (21 - 24.9%) -- possible 6HKO
18
Kingambit
DarkSteel
SOFT CHECK
View matchup
98.836
53.6%
Standard error 5.02 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
19
Moltres
FireFlying
OFFENSIVE CHECK
View matchup
42.914
61.9%
Standard error 7.41 points
▾
252+ SpA Moltres Flamethrower vs. 252 HP / 252+ SpD Iron Treads: 284-336 (73.9 - 87.5%) -- guaranteed 2HKO after Leftovers recovery
20
Keldeo
WaterFighting
OFFENSIVE CHECK
View matchup
28.088
67.0%
Standard error 8.87 points
▾
252+ SpA Keldeo Surf vs. 252 HP / 252+ SpD Iron Treads: 290-344 (75.5 - 89.5%) -- guaranteed 2HKO after Leftovers recovery
21
Landorus-Therian
GroundFlying
SOFT CHECK
View matchup
231.039
40.9%
Standard error 3.23 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Iron Treads: 332-392 (86.4 - 102%) -- 18.8% chance to OHKO
22
Slowbro
WaterPsychic
SOFT CHECK
View matchup
50.828
54.4%
Standard error 6.99 points
▾
252+ SpA Slowbro Scald vs. 252 HP / 252+ SpD Iron Treads: 218-258 (56.7 - 67.1%) -- guaranteed 2HKO after Leftovers recovery
23
Dragonite
DragonFlying
SOFT CHECK
View matchup
82.945
48.1%
Standard error 5.49 points
▾
252+ Atk Dragonite Earthquake vs. 252 HP / 0 Def Iron Treads: 210-248 (54.6 - 64.5%) -- guaranteed 2HKO after Leftovers recovery
24
Garchomp
DragonGround
SOFT CHECK
View matchup
96.582
45.2%
Standard error 5.06 points
▾
252+ Atk Garchomp Earthquake vs. 252 HP / 0 Def Iron Treads: 306-362 (79.6 - 94.2%) -- guaranteed 2HKO after Leftovers recovery
25
Gholdengo
SteelGhost
SOFT CHECK
View matchup
232.332
35.3%
Standard error 3.14 points
▾
252+ SpA Gholdengo Focus Blast vs. 252 HP / 252+ SpD Iron Treads: 264-312 (68.7 - 81.2%) -- guaranteed 2HKO after Leftovers recovery
26
Hatterene
PsychicFairy
SOFT CHECK
View matchup
102.026
42.3%
Standard error 4.89 points
▾
252+ SpA Hatterene Mystical Fire vs. 252 HP / 252+ SpD Iron Treads: 170-200 (44.2 - 52%) -- guaranteed 3HKO after Leftovers recovery
27
Tapu Lele
PsychicFairy
SOFT CHECK
View matchup
115.34
35.4%
Standard error 4.45 points
▾
252+ SpA Tapu Lele Focus Blast vs. 252 HP / 252+ SpD Iron Treads: 260-306 (67.7 - 79.6%) -- guaranteed 2HKO after Leftovers recovery
28
Gliscor
GroundFlying
SOFT CHECK
View matchup
168.031
30.9%
Standard error 3.56 points
▾
252+ Atk Gliscor Earthquake vs. 252 HP / 0 Def Iron Treads: 248-294 (64.5 - 76.5%) -- guaranteed 2HKO after Leftovers recovery
29
Alomomola
Water
SOFT CHECK
View matchup
313.835
24.3%
Standard error 2.42 points
▾
252+ Atk Alomomola Liquidation vs. 252 HP / 0 Def Iron Treads: 182-216 (47.3 - 56.2%) -- 23.4% chance to 2HKO after Leftovers recovery
30
Diancie-Mega
RockFairy
SOFT CHECK
View matchup
105.138
30.6%
Standard error 4.49 points
▾
252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Iron Treads: 226-268 (58.8 - 69.7%) -- guaranteed 2HKO after Leftovers recovery
Ranked #15 with 11.11% usage. Sorted by conservative score.