Ranked by reliability — blends KO rate with how often each Pokémon is matched up.
#
Checker
Encounters
Reliability
KO Rate
01
Dragonite
DragonFlying
OFFENSIVE CHECK
123.477
92.8%
dies 3.86%
▾
252+ Atk Dragonite Earthquake vs. 252 HP / 0 Def Heatran: 468-552 (121.2 - 143%) -- guaranteed OHKO
02
Ogerpon-Wellspring
GrassWater
OFFENSIVE CHECK
96.184
83.2%
dies 6.49%
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Ivy Cudgel vs. 252 HP / 0 Def Heatran: 390-458 (101 - 118.6%) -- guaranteed OHKO
03
Samurott-Hisui
WaterDark
OFFENSIVE CHECK
56.327
81.3%
dies 7.30%
▾
252+ Atk Sharpness Samurott-Hisui Razor Shell vs. 252 HP / 0 Def Heatran: 338-398 (87.5 - 103.1%) -- 25% chance to OHKO
04
Garchomp
DragonGround
OFFENSIVE CHECK
144.879
81.0%
dies 5.29%
▾
252+ Atk Garchomp Earthquake vs. 252 HP / 0 Def Heatran: 684-808 (177.2 - 209.3%) -- guaranteed OHKO
05
Clodsire
PoisonGround
DEFENSIVE COUNTER
59.222
79.4%
dies 7.29%
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Clodsire: 195-229 (42 - 49.3%) -- guaranteed 3HKO after Black Sludge recovery
06
Venusaur-Mega
GrassPoison
DEFENSIVE COUNTER
64.907
77.8%
dies 7.24%
▾
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
07
Ting-Lu
DarkGround
DEFENSIVE COUNTER
87.857
77.5%
dies 7.61%
▾
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
08
Tyranitar-Mega
RockDark
DEFENSIVE COUNTER
73.568
75.7%
dies 8.59%
▾
252+ SpA Heatran Flash Cannon vs. 252 HP / 252+ SpD Tyranitar-Mega in Sand: 122-146 (30.1 - 36.1%) -- 52.4% chance to 3HKO
09
Great Tusk
GroundFighting
DEFENSIVE COUNTER
132.708
75.7%
dies 6.41%
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Great Tusk: 282-333 (64.9 - 76.7%) -- guaranteed 2HKO
10
Zamazenta
Fighting
OFFENSIVE CHECK
140.103
75.4%
dies 6.26%
▾
252+ Atk Zamazenta Close Combat vs. 252 HP / 0 Def Heatran: 390-458 (101 - 118.6%) -- guaranteed OHKO
11
Iron Treads
GroundSteel
DEFENSIVE COUNTER
67.996
73.0%
dies 7.58%
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Iron Treads: 486-572 (126.5 - 148.9%) -- guaranteed OHKO
12
Ursaluna
GroundNormal
OFFENSIVE CHECK
96.618
69.7%
dies 8.07%
▾
252+ Atk Ursaluna Headlong Rush vs. 252 HP / 0 Def Heatran: 868-1024 (224.8 - 265.2%) -- guaranteed OHKO
13
Iron Valiant
FairyFighting
OFFENSIVE CHECK
81.973
68.0%
dies 8.85%
▾
0- Atk Iron Valiant Close Combat vs. 252 HP / 0 Def Heatran: 278-330 (72 - 85.4%) -- guaranteed 2HKO after Leftovers recovery
14
Gliscor
GroundFlying
DEFENSIVE COUNTER
339.983
67.7%
dies 4.39%
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Gliscor: 232-274 (65.5 - 77.4%) -- guaranteed 2HKO
15
Urshifu-Rapid-Strike
FightingWater
OFFENSIVE CHECK
58.085
67.3%
dies 8.56%
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Heatran: 410-486 (106.2 - 125.9%) -- guaranteed OHKO
16
Charizard-Mega-Y
FireFlying
OFFENSIVE CHECK
100.447
66.7%
dies 7.99%
▾
252+ SpA Charizard-Mega-Y Scorching Sands vs. 252 HP / 252+ SpD Heatran: 272-320 (70.4 - 82.9%) -- guaranteed 2HKO after Leftovers recovery
17
Diancie-Mega
RockFairy
OFFENSIVE CHECK
103.777
64.5%
dies 8.05%
▾
252+ SpA Diancie-Mega Earth Power vs. 252 HP / 252+ SpD Heatran: 348-412 (90.1 - 106.7%) -- 37.5% chance to OHKO
18
Terapagos
Normal
DEFENSIVE COUNTER
136.054
58.6%
dies 7.28%
▾
252+ SpA Heatran Eruption (150 BP) vs. 252 HP / 252+ SpD Terapagos: 216-255 (56.2 - 66.4%) -- guaranteed 2HKO
19
Kyurem
DragonIce
OFFENSIVE CHECK
89.2
58.2%
dies 8.95%
▾
0- SpA Kyurem Earth Power vs. 252 HP / 252+ SpD Heatran: 204-240 (52.8 - 62.1%) -- 98.4% chance to 2HKO after Leftovers recovery
20
Landorus-Therian
GroundFlying
OFFENSIVE CHECK
148.811
56.1%
dies 7.02%
▾
252+ Atk Landorus-Therian Earthquake vs. 252 HP / 0 Def Heatran: 744-876 (192.7 - 226.9%) -- guaranteed OHKO
21
Latios-Mega
DragonPsychic
OFFENSIVE CHECK
40.302
55.3%
dies 11.06%
▾
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
SOFT CHECK
42.774
52.5%
dies 10.74%
▾
Chansey Seismic Toss vs. 252 HP Heatran: 100-100 (25.9 - 25.9%) -- guaranteed 5HKO after Leftovers recovery
23
Heatran
FireSteel
SOFT CHECK
22.719
49.6%
dies 10.49%
▾
252+ SpA Heatran Earth Power vs. 252 HP / 252+ SpD Heatran: 300-356 (77.7 - 92.2%) -- guaranteed 2HKO after Leftovers recovery
24
Charizard-Mega-X
FireDragon
SOFT CHECK
80.782
47.1%
dies 9.48%
▾
252+ Atk Charizard-Mega-X Earthquake vs. 252 HP / 0 Def Heatran: 456-540 (118.1 - 139.8%) -- guaranteed OHKO
25
Raging Bolt
ElectricDragon
SOFT CHECK
137.643
43.0%
dies 7.25%
▾
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
26
Blissey
Normal
SOFT CHECK
26.977
42.0%
dies 9.50%
▾
Blissey Seismic Toss vs. 252 HP Heatran: 100-100 (25.9 - 25.9%) -- guaranteed 5HKO after Leftovers recovery
27
Toxapex
PoisonWater
SOFT CHECK
132.163
34.0%
dies 7.02%
▾
252+ SpA Toxapex Scald vs. 252 HP / 252+ SpD Heatran: 116-138 (30 - 35.7%) -- guaranteed 4HKO after Leftovers recovery
28
Volcarona
BugFire
SOFT CHECK
55.942
33.2%
dies 8.35%
▾
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
Kingambit
DarkSteel
SOFT CHECK
110.436
33.1%
dies 7.72%
▾
252+ Atk Kingambit Low Kick (120 BP) vs. 252 HP / 0 Def Heatran: 282-332 (73 - 86%) -- guaranteed 2HKO after Leftovers recovery
30
Tapu Lele
PsychicFairy
SOFT CHECK
125.281
33.0%
dies 7.26%
▾
252+ SpA Tapu Lele Focus Blast vs. 252 HP / 252+ SpD Heatran: 200-236 (51.8 - 61.1%) -- 94.9% chance to 2HKO after Leftovers recovery
Ranked #28 with 7.45% usage. Sorted by reliability score.