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
Garganacl
Rock
DEFENSIVE CHECK
View matchup
321.117
86.8%
Standard error 1.89 points
▾
252+ Atk Ho-Oh Earthquake vs. 252 HP / 252+ Def Garganacl: 146-172 (36.1 - 42.5%) -- 93.2% chance to 3HKO after Leftovers recovery
02
Salamence-Mega
DragonFlying
OFFENSIVE CHECK
View matchup
96.397
83.8%
Standard error 3.75 points
▾
252+ Atk Aerilate Salamence-Mega Double-Edge vs. 252 HP / 0 Def Ho-Oh: 306-361 (73.5 - 86.7%) -- guaranteed 2HKO
03
Mewtwo
Psychic
OFFENSIVE CHECK
View matchup
131.387
80.4%
Standard error 3.46 points
▾
252+ SpA Life Orb Mewtwo Psystrike vs. 252 HP / 0 Def Ho-Oh: 289-341 (69.4 - 81.9%) -- guaranteed 2HKO
04
Zygarde
DragonGround
DEFENSIVE CHECK
View matchup
974.061
71.7%
Standard error 1.44 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Zygarde: 135-160 (32.1 - 38%) -- 0.6% chance to 3HKO after Leftovers recovery
05
Groudon-Primal
GroundFire
OFFENSIVE CHECK
View matchup
1,614.047
69.8%
Standard error 1.14 points
▾
252+ Atk Groudon-Primal Heat Crash (120 BP) vs. 252 HP / 0 Def Ho-Oh in Harsh Sunshine: 225-266 (54 - 63.9%) -- guaranteed 2HKO
06
Kyogre-Primal
Water
OFFENSIVE CHECK
View matchup
489.722
69.6%
Standard error 2.08 points
▾
252+ SpA Kyogre-Primal Water Spout (150 BP) vs. 252 HP / 252+ SpD Ho-Oh in Heavy Rain: 548-648 (131.7 - 155.7%) -- guaranteed OHKO
07
Eternatus
PoisonDragon
OFFENSIVE CHECK
View matchup
793.361
65.8%
Standard error 1.68 points
▾
+1 252+ SpA Eternatus Meteor Beam vs. 252 HP / 252+ SpD Ho-Oh: 496-584 (119.2 - 140.3%) -- guaranteed OHKO
08
Necrozma-Dusk-Mane
PsychicSteel
OFFENSIVE CHECK
View matchup
415.578
66.0%
Standard error 2.32 points
▾
0- Atk Necrozma-Dusk-Mane Stone Edge vs. 252 HP / 0 Def Ho-Oh: 420-496 (100.9 - 119.2%) -- guaranteed OHKO
09
Mewtwo-Mega-X
PsychicFighting
OFFENSIVE CHECK
View matchup
65.354
77.2%
Standard error 5.19 points
▾
252+ Atk Mewtwo-Mega-X Stone Edge vs. 252 HP / 0 Def Ho-Oh: 700-824 (168.2 - 198%) -- guaranteed OHKO
10
Mewtwo-Mega-Y
Psychic
OFFENSIVE CHECK
View matchup
138.124
70.1%
Standard error 3.90 points
▾
252+ SpA Mewtwo-Mega-Y Psystrike vs. 252 HP / 0 Def Ho-Oh: 267-315 (64.1 - 75.7%) -- guaranteed 2HKO
11
Tyranitar-Mega
RockDark
DEFENSIVE CHECK
View matchup
43.714
79.0%
Standard error 6.16 points
▾
252+ Atk Ho-Oh Earthquake vs. 252 HP / 252+ Def Tyranitar-Mega: 130-154 (32.1 - 38.1%) -- 95.7% chance to 3HKO
12
Arceus
Normal
DEFENSIVE CHECK
View matchup
262.331
64.6%
Standard error 2.95 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Arceus: 136-162 (30.6 - 36.4%) -- 58.2% chance to 3HKO
13
Calyrex-Ice
PsychicIce
DEFENSIVE CHECK
View matchup
101.609
69.8%
Standard error 4.55 points
▾
252+ Atk Ho-Oh Sacred Fire vs. 252 HP / 252+ Def Calyrex-Ice: 194-230 (48 - 56.9%) -- 90.6% chance to 2HKO
14
Terapagos
Normal
DEFENSIVE CHECK
View matchup
35.673
78.5%
Standard error 6.88 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Terapagos: 172-204 (44.7 - 53.1%) -- 28.1% chance to 2HKO
15
Deoxys-Attack
Psychic
OFFENSIVE CHECK
View matchup
162.299
65.3%
Standard error 3.74 points
▾
0- Atk Life Orb Deoxys-Attack Rock Slide vs. 252 HP / 0 Def Ho-Oh: 463-546 (111.2 - 131.2%) -- guaranteed OHKO
16
Marshadow
FightingGhost
OFFENSIVE CHECK
View matchup
444.178
59.1%
Standard error 2.33 points
▾
252+ Atk Technician Marshadow Rock Tomb vs. 252 HP / 0 Def Ho-Oh: 460-544 (110.5 - 130.7%) -- guaranteed OHKO
17
Yveltal
DarkFlying
OFFENSIVE CHECK
View matchup
1,147.871
55.4%
Standard error 1.47 points
▾
0- Atk Life Orb Dark Aura Yveltal Knock Off (97.5 BP) vs. 252 HP / 0 Def Ho-Oh: 226-266 (54.3 - 63.9%) -- guaranteed 2HKO
18
Melmetal
Steel
DEFENSIVE CHECK
View matchup
104.305
65.6%
Standard error 4.65 points
▾
252+ Atk Ho-Oh Sacred Fire vs. 252 HP / 252+ Def Melmetal: 204-240 (43 - 50.6%) -- 2% chance to 2HKO
19
Zacian-Crowned
FairySteel
SOFT CHECK
View matchup
792.056
53.5%
Standard error 1.77 points
▾
+1 252+ Atk Zacian-Crowned Wild Charge vs. 252 HP / 0 Def Ho-Oh: 392-462 (94.2 - 111%) -- 62.5% chance to OHKO
20
Arceus-Ground
Ground
SOFT CHECK
View matchup
613.84
54.3%
Standard error 2.01 points
▾
0- Atk Arceus-Ground Stone Edge vs. 252 HP / 0 Def Ho-Oh: 332-392 (79.8 - 94.2%) -- guaranteed 2HKO
21
Kyurem-Black
DragonIce
OFFENSIVE CHECK
View matchup
36.829
74.0%
Standard error 7.23 points
▾
252+ Atk Kyurem-Black Fusion Bolt vs. 252 HP / 0 Def Ho-Oh: 320-378 (76.9 - 90.8%) -- guaranteed 2HKO
22
Arceus-Dark
Dark
SOFT CHECK
View matchup
489.155
53.0%
Standard error 2.26 points
▾
0- Atk Dread Plate Arceus-Dark Foul Play vs. 252 HP / 0 Def Ho-Oh: 151-178 (36.2 - 42.7%) -- guaranteed 3HKO
23
Lunala
PsychicGhost
SOFT CHECK
View matchup
289.731
54.8%
Standard error 2.92 points
▾
+1 252+ SpA Lunala Meteor Beam vs. 252 HP / 252+ SpD Ho-Oh: 476-560 (114.4 - 134.6%) -- guaranteed OHKO
24
Dondozo
Water
SOFT CHECK
View matchup
271.984
53.3%
Standard error 3.02 points
▾
252+ Atk Dondozo Wave Crash vs. 252 HP / 0 Def Ho-Oh: 392-464 (94.2 - 111.5%) -- 68.8% chance to OHKO
25
Rayquaza
DragonFlying
OFFENSIVE CHECK
View matchup
23.934
74.4%
Standard error 8.92 points
▾
252+ Atk Choice Band Rayquaza Dragon Ascent vs. 252 HP / 0 Def Ho-Oh: 391-462 (93.9 - 111%) -- 62.5% chance to OHKO
26
Chien-Pao
DarkIce
SOFT CHECK
View matchup
132.619
52.0%
Standard error 4.34 points
▾
252+ Atk Sword of Ruin Chien-Pao Icicle Crash vs. 252 HP / 0 Def Ho-Oh: 210-247 (50.4 - 59.3%) -- guaranteed 2HKO
27
Kyogre
Water
DEFENSIVE CHECK
View matchup
22.447
72.3%
Standard error 9.44 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 252+ Def Kyogre: 166-196 (41 - 48.5%) -- guaranteed 3HKO
28
Ho-Oh
FireFlying
SOFT CHECK
View matchup
1,373.836
37.6%
Standard error 1.31 points
▾
252+ Atk Ho-Oh Brave Bird vs. 252 HP / 0 Def Ho-Oh: 235-277 (56.4 - 66.5%) -- guaranteed 2HKO
29
Alomomola
Water
SOFT CHECK
View matchup
555.592
40.2%
Standard error 2.08 points
▾
252+ Atk Alomomola Flip Turn vs. 252 HP / 0 Def Ho-Oh: 164-194 (39.4 - 46.6%) -- guaranteed 3HKO
30
Chi-Yu
DarkFire
SOFT CHECK
View matchup
83.718
53.5%
Standard error 5.45 points
▾
252+ SpA Beads of Ruin Chi-Yu Dark Pulse vs. 252 HP / 252+ SpD Ho-Oh: 105-124 (25.2 - 29.8%) -- guaranteed 4HKO
Ranked #4 with 32.45% usage. Sorted by conservative score.