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
Swampert-Mega
WaterGround
OFFENSIVE CHECK
View matchup
117.965
86.1%
Standard error 5.45 points
▾
252+ Atk Swampert-Mega Earthquake vs. 252 HP / 0 Def Heatran: 760-900 (196.8 - 233.1%) -- guaranteed OHKO
02
Manaphy
Water
DEFENSIVE CHECK
View matchup
20.835
89.7%
Standard error 6.66 points
▾
252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Manaphy: 78-92 (19.3 - 22.7%) -- possible 5HKO
03
Gliscor
GroundFlying
DEFENSIVE CHECK
View matchup
294.395
77.5%
Standard error 4.15 points
▾
252+ SpA Heatran Magma Storm vs. 252 HP / 252+ SpD Gliscor: 156-184 (44 - 51.9%) -- guaranteed 2HKO after trapping damage
04
Greninja
WaterDark
OFFENSIVE CHECK
View matchup
298.522
73.7%
Standard error 4.40 points
▾
252+ SpA Choice Specs Greninja Hydro Pump vs. 252 HP / 252+ SpD Heatran: 348-410 (90.1 - 106.2%) -- 37.5% chance to OHKO
05
Kommo-o
DragonFighting
DEFENSIVE CHECK
View matchup
23.614
84.2%
Standard error 7.50 points
▾
252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Kommo-o: 75-89 (21.1 - 25.1%) -- 0.1% chance to 4HKO
06
Diancie-Mega
RockFairy
OFFENSIVE CHECK
View matchup
26.133
81.4%
Standard error 7.61 points
▾
252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Heatran: 348-412 (90.1 - 106.7%) -- 37.5% chance to OHKO
07
Medicham-Mega
FightingPsychic
OFFENSIVE CHECK
View matchup
99.096
77.1%
Standard error 7.00 points
▾
252+ Atk Pure Power Medicham-Mega High Jump Kick vs. 252 HP / 0 Def Heatran: 738-870 (191.1 - 225.3%) -- guaranteed OHKO
08
Garchomp
DragonGround
OFFENSIVE CHECK
View matchup
103.01
76.6%
Standard error 7.13 points
▾
252+ Atk Garchomp Earthquake vs. 252 HP / 0 Def Heatran: 684-808 (177.2 - 209.3%) -- guaranteed OHKO
09
Hippowdon
Ground
DEFENSIVE CHECK
View matchup
23.464
80.0%
Standard error 8.25 points
▾
252+ SpA Heatran Magma Storm vs. 252 HP / 252+ SpD Hippowdon: 159-187 (37.8 - 44.5%) -- 3.1% chance to 2HKO after Leftovers recovery and trapping damage
10
Tapu Fini
WaterFairy
DEFENSIVE CHECK
View matchup
198.979
67.5%
Standard error 5.65 points
▾
252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Tapu Fini: 65-77 (18.8 - 22.3%) -- possible 6HKO
11
Excadrill
GroundSteel
OFFENSIVE CHECK
View matchup
56.797
75.1%
Standard error 8.01 points
▾
252+ Atk Excadrill Earthquake vs. 252 HP / 0 Def Heatran: 708-832 (183.4 - 215.5%) -- guaranteed OHKO
12
Alakazam-Mega
Psychic
OFFENSIVE CHECK
View matchup
41.044
78.7%
Standard error 9.04 points
▾
252+ SpA Alakazam-Mega Focus Blast vs. 252 HP / 252+ SpD Heatran: 248-294 (64.2 - 76.1%) -- guaranteed 2HKO after Leftovers recovery
13
Blissey
Normal
DEFENSIVE CHECK
View matchup
21.058
78.0%
Standard error 9.03 points
▾
252+ SpA Heatran Magma Storm vs. 252 HP / 252+ SpD Blissey: 105-124 (14.7 - 17.3%) -- guaranteed 4HKO after trapping damage
14
Landorus-Therian
GroundFlying
OFFENSIVE CHECK
View matchup
325.772
58.7%
Standard error 4.71 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Heatran: 744-876 (192.7 - 226.9%) -- guaranteed OHKO
15
Charizard-Mega-Y
FireFlying
OFFENSIVE CHECK
View matchup
87.676
70.4%
Standard error 8.38 points
▾
252+ SpA Charizard-Mega-Y Hidden Power Ground vs. 252 HP / 252+ SpD Heatran: 232-276 (60.1 - 71.5%) -- guaranteed 2HKO after Leftovers recovery
16
Gastrodon
WaterGround
DEFENSIVE CHECK
View matchup
53.205
70.6%
Standard error 8.44 points
▾
252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Gastrodon: 89-105 (20.8 - 24.6%) -- possible 6HKO
17
Sableye-Mega
DarkGhost
DEFENSIVE CHECK
View matchup
74.441
62.3%
Standard error 7.89 points
▾
252+ SpA Heatran Magma Storm vs. 252 HP / 252+ SpD Sableye-Mega: 118-139 (38.8 - 45.7%) -- guaranteed 2HKO after trapping damage
18
Tyranitar-Mega
RockDark
DEFENSIVE CHECK
View matchup
44.395
69.5%
Standard error 9.76 points
▾
252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Tyranitar-Mega in Sand: 92-110 (22.7 - 27.2%) -- 50% chance to 4HKO
19
Kyurem-Black
DragonIce
OFFENSIVE CHECK
View matchup
84.708
64.2%
Standard error 8.87 points
▾
0- SpA Teravolt Kyurem-Black Earth Power vs. 252 HP / 252+ SpD Heatran: 188-224 (48.7 - 58%) -- 50.8% chance to 2HKO after Leftovers recovery
20
Heatran
FireSteel
SOFT CHECK
View matchup
196.651
45.9%
Standard error 6.13 points
▾
252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Heatran: 300-356 (77.7 - 92.2%) -- guaranteed 2HKO after Leftovers recovery
21
Rotom-Wash
ElectricWater
OFFENSIVE CHECK
View matchup
87.947
55.6%
Standard error 9.10 points
▾
252+ SpA Rotom-Wash Hydro Pump vs. 252 HP / 252+ SpD Heatran: 236-278 (61.1 - 72%) -- guaranteed 2HKO after Leftovers recovery
22
Kartana
GrassSteel
SOFT CHECK
View matchup
135.982
45.2%
Standard error 7.25 points
▾
252+ Atk Kartana Sacred Sword vs. 252 HP / 0 Def Heatran: 264-312 (68.3 - 80.8%) -- guaranteed 2HKO after Leftovers recovery
23
Chansey
Normal
SOFT CHECK
View matchup
132.352
44.8%
Standard error 7.41 points
▾
Chansey Seismic Toss vs. 252 HP Heatran: 100-100 (25.9 - 25.9%) -- guaranteed 5HKO after Leftovers recovery
24
Tapu Lele
PsychicFairy
SOFT CHECK
View matchup
122.209
43.1%
Standard error 7.67 points
▾
252+ SpA Choice Specs Tapu Lele Focus Blast vs. 252 HP / 252+ SpD Heatran: 298-352 (77.2 - 91.1%) -- guaranteed 2HKO after Leftovers recovery
25
Toxapex
PoisonWater
SOFT CHECK
View matchup
313.118
30.3%
Standard error 4.47 points
▾
252+ SpA Toxapex Scald vs. 252 HP / 252+ SpD Heatran: 116-138 (30 - 35.7%) -- guaranteed 4HKO after Leftovers recovery
26
Victini
PsychicFire
SOFT CHECK
View matchup
35.896
45.0%
Standard error 8.30 points
▾
Victini Final Gambit vs. 252 HP Heatran: 341-341 (88.3 - 88.3%) -- guaranteed 2HKO after Leftovers recovery
27
Latias-Mega
DragonPsychic
SOFT CHECK
View matchup
140.959
38.3%
Standard error 6.90 points
▾
252+ SpA Latias-Mega Thunder vs. 252 HP / 252+ SpD Heatran: 96-114 (24.8 - 29.5%) -- possible 5HKO
28
Volcarona
BugFire
SOFT CHECK
View matchup
20.273
50.8%
Standard error 11.10 points
▾
252+ SpA Volcarona Hidden Power Ground vs. 252 HP / 252+ SpD Heatran: 204-244 (52.8 - 63.2%) -- 99.6% chance to 2HKO after Leftovers recovery
29
Tapu Koko
ElectricFairy
SOFT CHECK
View matchup
157.876
31.3%
Standard error 6.27 points
▾
252+ SpA Life Orb Tapu Koko Thunderbolt vs. 252 HP / 252+ SpD Heatran in Electric Terrain: 175-208 (45.3 - 53.8%) -- 2% chance to 2HKO after Leftovers recovery
30
Magearna
SteelFairy
SOFT CHECK
View matchup
285.614
22.3%
Standard error 4.22 points
▾
252+ SpA Magearna Focus Blast vs. 252 HP / 252+ SpD Heatran: 200-236 (51.8 - 61.1%) -- 94.9% chance to 2HKO after Leftovers recovery
Ranked #10 with 15.36% usage. Sorted by conservative score.