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
Dragonite
DragonFlying
OFFENSIVE CHECK
View matchup
127.811
87.5%
Standard error 5.05 points
▾
252+ Atk Dragonite Earthquake vs. 252 HP / 0 Def Heatran: 468-552 (121.2 - 143%) -- guaranteed OHKO
02
Garchomp
DragonGround
OFFENSIVE CHECK
View matchup
170.306
84.2%
Standard error 4.71 points
▾
252+ Atk Garchomp Earthquake vs. 252 HP / 0 Def Heatran: 684-808 (177.2 - 209.3%) -- guaranteed OHKO
03
Ogerpon-Wellspring
GrassWater
OFFENSIVE CHECK
View matchup
138.746
82.3%
Standard error 5.40 points
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Ivy Cudgel vs. 252 HP / 0 Def Heatran: 390-458 (101 - 118.6%) -- guaranteed OHKO
04
Ting-Lu
DarkGround
DEFENSIVE CHECK
View matchup
149.153
79.2%
Standard error 5.53 points
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Vessel of Ruin Ting-Lu: 168-198 (32.6 - 38.5%) -- 2.7% chance to 3HKO after Leftovers recovery
05
Zamazenta
Fighting
OFFENSIVE CHECK
View matchup
169.345
78.1%
Standard error 5.28 points
▾
252+ Atk Zamazenta Close Combat vs. 252 HP / 0 Def Heatran: 390-458 (101 - 118.6%) -- guaranteed OHKO
06
Gliscor
GroundFlying
DEFENSIVE CHECK
View matchup
284.208
71.3%
Standard error 4.59 points
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Gliscor: 232-274 (65.5 - 77.4%) -- guaranteed 2HKO
07
Great Tusk
GroundFighting
DEFENSIVE CHECK
View matchup
163.791
75.0%
Standard error 5.65 points
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Great Tusk: 282-333 (64.9 - 76.7%) -- guaranteed 2HKO
08
Tyranitar-Mega
RockDark
DEFENSIVE CHECK
View matchup
75.262
77.6%
Standard error 6.74 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
09
Charizard-Mega-Y
FireFlying
OFFENSIVE CHECK
View matchup
100.116
77.4%
Standard error 7.16 points
▾
252+ SpA Charizard-Mega-Y Scorching Sands vs. 252 HP / 252+ SpD Heatran: 272-320 (70.4 - 82.9%) -- guaranteed 2HKO after Leftovers recovery
10
Clodsire
PoisonGround
DEFENSIVE CHECK
View matchup
73.014
73.6%
Standard error 6.92 points
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Clodsire: 195-229 (42 - 49.3%) -- guaranteed 3HKO after Black Sludge recovery
11
Venusaur-Mega
GrassPoison
DEFENSIVE CHECK
View matchup
78.811
72.4%
Standard error 6.89 points
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Thick Fat Venusaur-Mega: 170-204 (46.7 - 56%) -- 75.4% chance to 2HKO
12
Samurott-Hisui
WaterDark
OFFENSIVE CHECK
View matchup
57.199
75.7%
Standard error 8.00 points
▾
252+ Atk Sharpness Samurott-Hisui Razor Shell vs. 252 HP / 0 Def Heatran: 338-398 (87.5 - 103.1%) -- 25% chance to OHKO
13
Iron Treads
GroundSteel
DEFENSIVE CHECK
View matchup
65.927
72.1%
Standard error 7.76 points
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Iron Treads: 486-572 (126.5 - 148.9%) -- guaranteed OHKO
14
Ursaluna
GroundNormal
OFFENSIVE CHECK
View matchup
61.673
71.7%
Standard error 8.04 points
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Heatran: 868-1024 (224.8 - 265.2%) -- guaranteed OHKO
15
Urshifu-Rapid-Strike
FightingWater
OFFENSIVE CHECK
View matchup
117.565
67.7%
Standard error 7.37 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Heatran: 410-486 (106.2 - 125.9%) -- guaranteed OHKO
16
Landorus-Therian
GroundFlying
OFFENSIVE CHECK
View matchup
172.837
59.8%
Standard error 6.32 points
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Heatran: 744-876 (192.7 - 226.9%) -- guaranteed OHKO
17
Terapagos
Normal
DEFENSIVE CHECK
View matchup
141.193
60.0%
Standard error 6.99 points
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Terapagos: 216-255 (56.2 - 66.4%) -- guaranteed 2HKO
18
Iron Valiant
FairyFighting
OFFENSIVE CHECK
View matchup
73.26
69.0%
Standard error 9.25 points
▾
252+ Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Heatran: 410-486 (106.2 - 125.9%) -- guaranteed OHKO
19
Kyurem
DragonIce
OFFENSIVE CHECK
View matchup
148.305
58.7%
Standard error 6.84 points
▾
252+ SpA Kyurem Earth Power vs. 252 HP / 252+ SpD Heatran: 300-356 (77.7 - 92.2%) -- guaranteed 2HKO after Leftovers recovery
20
Diancie-Mega
RockFairy
OFFENSIVE CHECK
View matchup
68.925
60.3%
Standard error 8.32 points
▾
252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Heatran: 348-412 (90.1 - 106.7%) -- 37.5% chance to OHKO
21
Latios-Mega
DragonPsychic
OFFENSIVE CHECK
View matchup
70.663
57.8%
Standard error 8.10 points
▾
252+ SpA Latios-Mega Aura Sphere vs. 252 HP / 252+ SpD Heatran: 156-184 (40.4 - 47.6%) -- guaranteed 3HKO after Leftovers recovery
22
Chansey
Normal
DEFENSIVE CHECK
View matchup
30.792
59.5%
Standard error 8.85 points
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Eviolite Chansey: 126-148 (17.8 - 21%) -- possible 5HKO
23
Clefable
Fairy
SOFT CHECK
View matchup
83.698
47.5%
Standard error 6.91 points
▾
0- Atk Clefable Knock Off (97.5 BP) vs. 252 HP / 0 Def Heatran: 45-53 (11.6 - 13.7%) -- possible 8HKO
24
Volcarona
BugFire
SOFT CHECK
View matchup
79.528
42.1%
Standard error 7.76 points
▾
252+ SpA Volcarona Psychic vs. 252 HP / 252+ SpD Heatran: 38-45 (9.8 - 11.6%)
25
Heatran
FireSteel
SOFT CHECK
View matchup
51.159
49.5%
Standard error 9.87 points
▾
252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Heatran: 300-356 (77.7 - 92.2%) -- guaranteed 2HKO after Leftovers recovery
26
Kingambit
DarkSteel
SOFT CHECK
View matchup
143.014
35.9%
Standard error 6.79 points
▾
252+ Atk Kingambit Low Kick (120 BP) vs. 252 HP / 0 Def Heatran: 282-332 (73 - 86%) -- guaranteed 2HKO after Leftovers recovery
27
Alomomola
Water
SOFT CHECK
View matchup
500.579
20.4%
Standard error 3.03 points
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 0 Def Heatran: 144-170 (37.3 - 44%) -- 99.9% chance to 3HKO after Leftovers recovery
28
Charizard-Mega-X
FireDragon
SOFT CHECK
View matchup
50.136
46.3%
Standard error 9.77 points
▾
252+ Atk Charizard-Mega-X Earthquake vs. 252 HP / 0 Def Heatran: 456-540 (118.1 - 139.8%) -- guaranteed OHKO
29
Raging Bolt
ElectricDragon
SOFT CHECK
View matchup
142.772
34.0%
Standard error 6.73 points
▾
252+ SpA Choice Specs Raging Bolt Thunderbolt vs. 252 HP / 252+ SpD Heatran: 174-205 (45 - 53.1%) -- 0.4% chance to 2HKO after Leftovers recovery
30
Toxapex
PoisonWater
SOFT CHECK
View matchup
180.151
29.6%
Standard error 5.77 points
▾
252+ SpA Toxapex Scald vs. 252 HP / 252+ SpD Heatran: 116-138 (30 - 35.7%) -- guaranteed 4HKO after Leftovers recovery
Ranked #33 with 6.42% usage. Sorted by conservative score.