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
Venusaur-Mega
GrassPoison
DEFENSIVE CHECK
View matchup
104.764
81.7%
Standard error 6.47 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 252+ Def Venusaur-Mega: 67-79 (18.4 - 21.7%) -- possible 5HKO
02
Dragonite
DragonFlying
OFFENSIVE CHECK
View matchup
171.314
71.7%
Standard error 5.88 points
▾
252+ Atk Dragonite Fly vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 332-392 (82.1 - 97%) -- guaranteed 2HKO
03
Clefable
Fairy
DEFENSIVE CHECK
View matchup
71.592
76.0%
Standard error 7.00 points
▾
252+ Atk Urshifu-Rapid-Strike Surging Strikes (3 hits) vs. 252 HP / 252+ Def Clefable on a critical hit: 180-216 (45.6 - 54.8%) -- 0.3% chance to 2HKO after Leftovers recovery
04
Latios-Mega
DragonPsychic
OFFENSIVE CHECK
View matchup
61.654
73.6%
Standard error 7.41 points
▾
252+ SpA Latios-Mega Luster Purge vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 390-462 (96.5 - 114.3%) -- 81.3% chance to OHKO
05
Raging Bolt
ElectricDragon
OFFENSIVE CHECK
View matchup
146.772
67.6%
Standard error 6.64 points
▾
252+ SpA Choice Specs Raging Bolt Thunderbolt vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 494-584 (122.2 - 144.5%) -- guaranteed OHKO
06
Keldeo
WaterFighting
OFFENSIVE CHECK
View matchup
39.5
68.7%
Standard error 7.38 points
▾
252+ SpA Keldeo Air Slash vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 176-208 (43.5 - 51.4%) -- 6.6% chance to 2HKO
07
Iron Valiant
FairyFighting
OFFENSIVE CHECK
View matchup
97.337
68.6%
Standard error 8.06 points
▾
252+ Atk Iron Valiant Spirit Break vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 270-320 (66.8 - 79.2%) -- guaranteed 2HKO
08
Toxapex
PoisonWater
DEFENSIVE CHECK
View matchup
146.001
62.2%
Standard error 6.64 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 252+ Def Toxapex: 57-68 (18.7 - 22.3%) -- possible 5HKO
09
Zamazenta
Fighting
SOFT CHECK
View matchup
259.824
50.5%
Standard error 5.25 points
▾
252+ Atk Zamazenta Close Combat vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 204-240 (50.4 - 59.4%) -- guaranteed 2HKO
10
Ogerpon-Wellspring
GrassWater
SOFT CHECK
View matchup
212.943
51.4%
Standard error 5.74 points
▾
252+ Atk Wellspring Mask Ogerpon-Wellspring Power Whip vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 488-576 (120.7 - 142.5%) -- guaranteed OHKO
11
Tornadus-Therian
Flying
SOFT CHECK
View matchup
153.812
44.2%
Standard error 6.75 points
▾
252+ SpA Tornadus-Therian Hurricane vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 344-408 (85.1 - 100.9%) -- 6.3% chance to OHKO
12
Gholdengo
SteelGhost
SOFT CHECK
View matchup
206.494
40.4%
Standard error 5.81 points
▾
252+ SpA Gholdengo Shadow Ball vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 144-171 (35.6 - 42.3%) -- guaranteed 3HKO
13
Tapu Lele
PsychicFairy
SOFT CHECK
View matchup
135.203
45.3%
Standard error 7.25 points
▾
252+ SpA Tapu Lele Future Sight vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike in Psychic Terrain: 552-650 (136.6 - 160.8%) -- guaranteed OHKO
14
Terapagos
Normal
SOFT CHECK
View matchup
178.777
40.8%
Standard error 6.27 points
▾
0- SpA Terapagos Tera Starstorm vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 81-96 (20 - 23.7%) -- guaranteed 5HKO
15
Kyurem
DragonIce
SOFT CHECK
View matchup
159.637
41.6%
Standard error 6.56 points
▾
252+ SpA Kyurem Freeze-Dry vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 248-294 (61.3 - 72.7%) -- guaranteed 2HKO
16
Charizard-Mega-Y
FireFlying
SOFT CHECK
View matchup
85.682
51.8%
Standard error 9.23 points
▾
252+ SpA Charizard-Mega-Y Solar Beam vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 328-388 (81.1 - 96%) -- guaranteed 2HKO
17
Charizard-Mega-X
FireDragon
SOFT CHECK
View matchup
84.849
51.9%
Standard error 9.30 points
▾
252+ Atk Tough Claws Charizard-Mega-X Outrage vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 280-330 (69.3 - 81.6%) -- guaranteed 2HKO
18
Zapdos
ElectricFlying
SOFT CHECK
View matchup
165.042
40.6%
Standard error 6.53 points
▾
252+ SpA Zapdos Hurricane vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 378-446 (93.5 - 110.3%) -- 62.5% chance to OHKO
19
Skarmory
SteelFlying
DEFENSIVE CHECK
View matchup
20.365
57.5%
Standard error 10.96 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 252+ Def Skarmory: 123-145 (36.8 - 43.4%) -- guaranteed 3HKO
20
Hatterene
PsychicFairy
SOFT CHECK
View matchup
63.788
47.8%
Standard error 8.70 points
▾
252+ SpA Hatterene Psychic Noise vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 276-326 (68.3 - 80.6%) -- guaranteed 2HKO
21
Pecharunt
PoisonGhost
SOFT CHECK
View matchup
64.272
47.0%
Standard error 8.77 points
▾
252+ SpA Pecharunt Malignant Chain vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 135-160 (33.4 - 39.6%) -- guaranteed 3HKO
22
Slowbro
WaterPsychic
SOFT CHECK
View matchup
32.311
44.6%
Standard error 8.74 points
▾
252+ SpA Slowbro Future Sight vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 354-416 (87.6 - 102.9%) -- 18.8% chance to OHKO
23
Garchomp
DragonGround
SOFT CHECK
View matchup
122.691
39.5%
Standard error 7.58 points
▾
252+ Atk Garchomp Outrage vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 216-255 (53.4 - 63.1%) -- guaranteed 2HKO
24
Lopunny-Mega
NormalFighting
SOFT CHECK
View matchup
32.248
42.5%
Standard error 8.70 points
▾
252+ Atk Lopunny-Mega Close Combat vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 223-264 (55.1 - 65.3%) -- guaranteed 2HKO
25
Volcarona
BugFire
SOFT CHECK
View matchup
92.929
34.7%
Standard error 6.78 points
▾
252+ SpA Volcarona Psychic vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike: 218-258 (53.9 - 63.8%) -- guaranteed 2HKO
26
Scizor-Mega
BugSteel
SOFT CHECK
View matchup
76.793
35.3%
Standard error 7.44 points
▾
252+ Atk Scizor-Mega Close Combat vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 160-189 (39.6 - 46.7%) -- guaranteed 3HKO
27
Great Tusk
GroundFighting
SOFT CHECK
View matchup
190.354
26.5%
Standard error 5.38 points
▾
252+ Atk Great Tusk Headlong Rush vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 217-256 (53.7 - 63.3%) -- guaranteed 2HKO
28
Melmetal
Steel
SOFT CHECK
View matchup
132.719
32.7%
Standard error 6.96 points
▾
252+ Atk Punching Glove Iron Fist Melmetal Thunder Punch vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 256-302 (63.3 - 74.7%) -- guaranteed 2HKO
29
Tapu Koko
ElectricFairy
SOFT CHECK
View matchup
75.412
42.9%
Standard error 9.70 points
▾
252+ SpA Choice Specs Tapu Koko Thunderbolt vs. 252 HP / 252+ SpD Urshifu-Rapid-Strike in Electric Terrain: 498-588 (123.2 - 145.5%) -- guaranteed OHKO
30
Urshifu-Rapid-Strike
FightingWater
SOFT CHECK
View matchup
83.98
40.6%
Standard error 9.20 points
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Urshifu-Rapid-Strike: 216-255 (53.4 - 63.1%) -- guaranteed 2HKO
Ranked #27 with 7.96% usage. Sorted by conservative score.