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
Blissey
Normal
DEFENSIVE CHECK
View matchup
21.587
74.8%
Standard error 9.35 points
▾
0- Atk Hydrapple Dragon Tail vs. 252 HP / 0 Def Blissey: 204-240 (28.5 - 33.6%) -- 0.2% chance to 3HKO
02
Conkeldurr
Fighting
OFFENSIVE CHECK
View matchup
20.121
73.2%
Standard error 9.88 points
▾
252+ Atk Conkeldurr Ice Punch vs. 252 HP / 0 Def Hydrapple: 352-416 (84.6 - 100%) -- 6.3% chance to OHKO
03
Arcanine-Hisui
FireRock
OFFENSIVE CHECK
View matchup
78.995
55.7%
Standard error 7.90 points
▾
252+ Atk Choice Band Arcanine-Hisui Head Smash vs. 252 HP / 0 Def Hydrapple: 340-402 (81.7 - 96.6%) -- guaranteed 2HKO
04
Metagross
SteelPsychic
DEFENSIVE CHECK
View matchup
25.591
59.4%
Standard error 9.71 points
▾
252+ SpA Hydrapple Earth Power vs. 252 HP / 252+ SpD Metagross: 158-186 (43.4 - 51%) -- 5.9% chance to 2HKO
05
Gardevoir
PsychicFairy
OFFENSIVE CHECK
View matchup
22.6
60.7%
Standard error 10.27 points
▾
252+ SpA Gardevoir Moonblast vs. 252 HP / 252+ SpD Hydrapple: 276-326 (66.3 - 78.3%) -- guaranteed 2HKO
06
Latios
DragonPsychic
SOFT CHECK
View matchup
104.595
50.5%
Standard error 8.32 points
▾
252+ SpA Soul Dew Latios Draco Meteor vs. 252 HP / 252+ SpD Hydrapple: 464-548 (111.5 - 131.7%) -- guaranteed OHKO
07
Hydrapple
GrassDragon
SOFT CHECK
View matchup
52.307
40.6%
Standard error 6.79 points
▾
252+ SpA Hydrapple Draco Meteor vs. 252 HP / 252+ SpD Hydrapple: 368-434 (88.4 - 104.3%) -- 31.3% chance to OHKO
08
Keldeo
WaterFighting
SOFT CHECK
View matchup
88.77
49.3%
Standard error 9.13 points
▾
252+ SpA Keldeo Icy Wind vs. 252 HP / 252+ SpD Hydrapple: 220-260 (52.8 - 62.5%) -- guaranteed 2HKO
09
Tinkaton
FairySteel
SOFT CHECK
View matchup
57.751
47.6%
Standard error 9.24 points
▾
252+ Atk Tinkaton Play Rough vs. 252 HP / 0 Def Hydrapple: 206-246 (49.5 - 59.1%) -- 99.6% chance to 2HKO
10
Tyranitar
RockDark
SOFT CHECK
View matchup
20.457
52.7%
Standard error 11.04 points
▾
252+ Atk Choice Band Tyranitar Ice Punch vs. 252 HP / 0 Def Hydrapple: 508-600 (122.1 - 144.2%) -- guaranteed OHKO
11
Skarmory
SteelFlying
SOFT CHECK
View matchup
105.353
41.0%
Standard error 8.27 points
▾
252+ Atk Skarmory Brave Bird vs. 252 HP / 0 Def Hydrapple: 288-338 (69.2 - 81.2%) -- guaranteed 2HKO
12
Clodsire
PoisonGround
SOFT CHECK
View matchup
59.532
42.3%
Standard error 8.90 points
▾
252+ Atk Clodsire Poison Jab vs. 252 HP / 0 Def Hydrapple: 186-218 (44.7 - 52.4%) -- 19.9% chance to 2HKO
13
Weavile
DarkIce
SOFT CHECK
View matchup
24.098
46.9%
Standard error 10.17 points
▾
252+ Atk Weavile Triple Axel (120 BP) (3 hits) vs. 252 HP / 0 Def Hydrapple: 760-904 (182.6 - 217.3%) -- guaranteed OHKO
14
Excadrill
GroundSteel
SOFT CHECK
View matchup
104.766
38.6%
Standard error 8.11 points
▾
252+ Atk Excadrill Iron Head vs. 252 HP / 0 Def Hydrapple: 136-162 (32.6 - 38.9%) -- 99.4% chance to 3HKO
15
Fezandipiti
PoisonFairy
SOFT CHECK
View matchup
33.321
39.9%
Standard error 8.49 points
▾
252+ Atk Fezandipiti Play Rough vs. 252 HP / 0 Def Hydrapple: 236-278 (56.7 - 66.8%) -- guaranteed 2HKO
16
Lokix
BugDark
SOFT CHECK
View matchup
75.171
35.0%
Standard error 7.72 points
▾
252+ Atk Choice Band Lokix First Impression vs. 252 HP / 0 Def Hydrapple: 378-446 (90.8 - 107.2%) -- 43.8% chance to OHKO
17
Slither Wing
BugFighting
SOFT CHECK
View matchup
23.085
43.6%
Standard error 10.32 points
▾
252+ Atk Slither Wing First Impression vs. 252 HP / 0 Def Hydrapple: 306-362 (73.5 - 87%) -- guaranteed 2HKO
18
Mandibuzz
DarkFlying
SOFT CHECK
View matchup
124
30.1%
Standard error 7.05 points
▾
252+ Atk Mandibuzz Knock Off (97.5 BP) vs. 252 HP / 0 Def Hydrapple: 102-121 (24.5 - 29%) -- 99.8% chance to 4HKO
19
Sandy Shocks
ElectricGround
SOFT CHECK
View matchup
62.435
19.4%
Standard error 7.00 points
▾
252+ SpA Sandy Shocks Power Gem vs. 252 HP / 252+ SpD Hydrapple: 76-90 (18.2 - 21.6%) -- possible 5HKO
20
Slowking
WaterPsychic
SOFT CHECK
View matchup
62.382
14.2%
Standard error 6.18 points
▾
252+ SpA Slowking Ice Beam vs. 252 HP / 252+ SpD Hydrapple: 300-356 (72.1 - 85.5%) -- guaranteed 2HKO
21
Hippowdon
Ground
SOFT CHECK
View matchup
28.526
6.9%
Standard error 4.74 points
▾
252+ Atk Hippowdon Ice Fang vs. 252 HP / 0 Def Hydrapple: 260-308 (62.5 - 74%) -- guaranteed 2HKO after sandstorm damage
Ranked #10 with 15.90% usage. Sorted by conservative score.