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
Arceus-Ghost
Ghost
DEFENSIVE CHECK
View matchup
182.163
68.0%
Standard error 3.46 points
▾
252+ Atk Groudon-Primal Headlong Rush vs. 252 HP / 252+ Def Arceus-Ghost: 175-207 (39.4 - 46.6%) -- guaranteed 3HKO
02
Arceus-Water
Water
DEFENSIVE CHECK
View matchup
41.206
73.8%
Standard error 6.85 points
▾
252+ Atk Groudon-Primal Headlong Rush vs. 252 HP / 252+ Def Fur Coat Arceus-Water: 88-105 (19.8 - 23.6%) -- possible 6HKO
03
Zamazenta
Fighting
OFFENSIVE CHECK
View matchup
51.726
65.5%
Standard error 6.61 points
▾
252+ Atk Zamazenta Combat Torque vs. 252 HP / 0 Def Groudon-Primal: 112-133 (27.7 - 32.9%) -- guaranteed 4HKO
04
Koraidon
FightingDragon
OFFENSIVE CHECK
View matchup
65.875
58.4%
Standard error 6.07 points
▾
252+ Atk Koraidon Glaive Rush vs. 252 HP / 0 Def Groudon-Primal: 147-174 (36.3 - 43%) -- guaranteed 3HKO
05
Groudon-Primal
GroundFire
SOFT CHECK
View matchup
204.393
46.2%
Standard error 3.49 points
▾
252+ Atk Groudon-Primal Surging Strikes (3 hits) vs. 252 HP / 0 Def Groudon-Primal on a critical hit: 468-552 (115.8 - 136.6%) -- guaranteed OHKO
06
Chansey
Normal
SOFT CHECK
View matchup
155.28
45.1%
Standard error 3.99 points
▾
252+ Atk Chansey Salt Cure vs. 252 HP / 0 Def Groudon-Primal: 11-13 (2.7 - 3.2%)
07
Greninja
WaterDark
OFFENSIVE CHECK
View matchup
27.629
58.0%
Standard error 9.39 points
▾
252+ Atk Choice Band Sniper Greninja Surging Strikes (3 hits) vs. 252 HP / 0 Def Groudon-Primal on a critical hit: 1026-1206 (253.9 - 298.5%) -- guaranteed OHKO
08
Giratina
GhostDragon
SOFT CHECK
View matchup
49.97
44.6%
Standard error 7.03 points
▾
252+ SpA Giratina Infernal Parade (60 BP) vs. 252 HP / 252+ SpD Groudon-Primal: 70-84 (17.3 - 20.7%) -- possible 5HKO
09
Slowbro-Mega
WaterPsychic
DEFENSIVE CHECK
View matchup
23.364
56.5%
Standard error 10.26 points
▾
252+ Atk Groudon-Primal Headlong Rush vs. 252 HP / 252+ Def Fur Coat Slowbro-Mega: 66-78 (16.7 - 19.7%) -- guaranteed 6HKO
10
Miraidon
ElectricDragon
OFFENSIVE CHECK
View matchup
21.452
57.6%
Standard error 10.67 points
▾
252+ SpA Miraidon Dragon Energy (150 BP) vs. 252 HP / 252+ SpD Groudon-Primal: 213-252 (52.7 - 62.3%) -- guaranteed 2HKO
11
Eternatus
PoisonDragon
SOFT CHECK
View matchup
99.787
32.1%
Standard error 4.67 points
▾
Eternatus Final Gambit vs. 252 HP Groudon-Primal: 421-421 (104.2 - 104.2%) -- guaranteed OHKO
12
Kyogre-Primal
Water
SOFT CHECK
View matchup
32.471
46.5%
Standard error 8.75 points
▾
252+ SpA Kyogre-Primal Water Spout (150 BP) vs. 252 HP / 252+ SpD Groudon-Primal: 1060-1252 (262.3 - 309.9%) -- guaranteed OHKO
13
Audino-Mega
NormalFairy
SOFT CHECK
View matchup
52.134
37.6%
Standard error 6.71 points
▾
252+ SpA Audino-Mega Moonblast vs. 252 HP / 252+ SpD Groudon-Primal: 48-57 (11.8 - 14.1%) -- possible 8HKO
14
Zacian
Fairy
SOFT CHECK
View matchup
27.511
48.2%
Standard error 9.53 points
▾
252+ Atk Pixilate Zacian Population Bomb (10 hits) vs. 252 HP / 0 Def Groudon-Primal: 140-170 (34.6 - 42%) -- guaranteed 3HKO
15
Alakazam-Mega
Psychic
SOFT CHECK
View matchup
22.837
50.1%
Standard error 10.46 points
▾
252+ SpA Choice Specs Beads of Ruin Alakazam-Mega Psycho Boost vs. 252 HP / 252+ SpD Groudon-Primal: 484-571 (119.8 - 141.3%) -- guaranteed OHKO
16
Diancie-Mega
RockFairy
SOFT CHECK
View matchup
72.875
29.4%
Standard error 5.34 points
▾
252+ SpA Diancie-Mega Steam Eruption vs. 252 HP / 252+ SpD Groudon-Primal: 476-560 (117.8 - 138.6%) -- guaranteed OHKO
17
Blissey
Normal
SOFT CHECK
View matchup
66.645
28.4%
Standard error 5.52 points
▾
252+ Atk Blissey U-turn vs. 252 HP / 0 Def Groudon-Primal: 9-11 (2.2 - 2.7%)
18
Celesteela
SteelFlying
SOFT CHECK
View matchup
118.854
20.5%
Standard error 3.70 points
▾
252+ Atk Celesteela Knock Off (97.5 BP) vs. 252 HP / 0 Def Groudon-Primal: 65-77 (16 - 19%) -- possible 6HKO
19
Ting-Lu
DarkGround
SOFT CHECK
View matchup
44.243
27.3%
Standard error 6.70 points
▾
252+ Atk Ting-Lu Knock Off (97.5 BP) vs. 252 HP / 0 Def Groudon-Primal: 103-123 (25.4 - 30.4%) -- guaranteed 4HKO
20
Dialga-Origin
SteelDragon
SOFT CHECK
View matchup
57.757
20.6%
Standard error 5.32 points
▾
0- SpA Adamant Crystal Dialga-Origin Doom Desire vs. 252 HP / 252+ SpD Groudon-Primal: 89-105 (22 - 25.9%) -- 6.3% chance to 4HKO
21
Registeel
Steel
SOFT CHECK
View matchup
175.343
3.1%
Standard error 1.31 points
▾
252+ Atk Registeel Knock Off (97.5 BP) vs. 252 HP / 0 Def Groudon-Primal: 54-64 (13.3 - 15.8%) -- possible 7HKO
22
Garchomp-Mega
DragonGround
SOFT CHECK
View matchup
26.25
35.1%
Standard error 9.31 points
▾
252+ Atk Garchomp-Mega Flip Turn vs. 252 HP / 0 Def Groudon-Primal: 236-280 (58.4 - 69.3%) -- guaranteed 2HKO
23
Kartana
GrassSteel
SOFT CHECK
View matchup
24.163
31.9%
Standard error 9.48 points
▾
252+ Atk Choice Band Kartana Jet Punch vs. 252 HP / 0 Def Groudon-Primal: 368-436 (91 - 107.9%) -- 50% chance to OHKO
24
Muk-Alola
PoisonDark
SOFT CHECK
View matchup
25.377
1.2%
Standard error 2.15 points
▾
252+ Atk Muk-Alola Knock Off (97.5 BP) vs. 252 HP / 0 Def Groudon-Primal: 100-118 (24.7 - 29.2%) -- 99.9% chance to 4HKO
25
Arceus-Steel
Steel
SOFT CHECK
View matchup
22.644
23.2%
Standard error 8.88 points
▾
252+ SpA Arceus-Steel Judgment vs. 252 HP / 252+ SpD Groudon-Primal: 88-104 (21.7 - 25.7%) -- 1.1% chance to 4HKO
Ranked #1 with 57.52% usage. Sorted by conservative score.