Is Rotom-Wash viable in Gen 7 OU?

Rotom-Wash is ranked #31 in Gen 7 OU with 6.49% usage according to Smogon May 2026 - Jul 2026 data.

What beats Rotom-Wash in Gen 7 OU?

Ferrothorn has the strongest conservative score in this observed May 2026 - Jul 2026 sample. The target was knocked out or switched out in 91.4% of 84.71849189781517 relevant encounters. Standard error is 5.2 points. Sets and switch conditions can change the result.

How are Rotom-Wash matchup checks ranked in Gen 7 OU?

They are ranked by p minus four standard errors. Here, p is the observed fraction of relevant encounters where Rotom-Wash was knocked out or switched out. This is not a set-specific battle guarantee.

Rotom-Wash counters

Gen 7 OU · Sorted by p − 4 standard errors · Smogon source period May 2026 - Jul 2026 · Generated 2026-08-05

#0479 Rotom-Wash

ElectricWater

USAGE 6.5% #31

BASE STATS

HP 50

ATK 65

DEF 107

SPA 105

SPD 107

SPE 86

BST520

TYPE MATCHUPS

2×

GrassGround

½×

FireWaterIceFlying

¼×

Steel

Moves

Volt Switch 99.8% Hydro Pump 99.7% Defog 71.2% Will-O-Wisp 64.4% Pain Split 30.0% Thunder Wave 17.6% Toxic 8.5% Thunder 5.0%

Items

Wiki Berry 26.3% Leftovers 24.9% Iapapa Berry 18.7% Waterium Z 17.0% Electrium Z 5.3% Aguav Berry 3.5% Choice Scarf 2.9% Mago Berry 0.6%

Common Teammates

Landorus-Therian69.3%

Browse Gen 7 OU teams using Rotom-Wash →

Explore Rotom-Wash + Ferrothorn teams 70 score Explore Rotom-Wash + Kartana teams 54 score Explore Rotom-Wash + Toxapex teams 42 score Explore Rotom-Wash + Tapu Koko teams 41 score

Leading observed checks

Open a matchup for a separate set-based damage estimate, or browse uploaded teams with both Pokémon.

Team core to explore

Rotom-Wash + Landorus-Therian 69.3% teammate usage Explore teams →

Checks & Counters

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

Ferrothorn

GrassSteel DEFENSIVE CHECK View matchup

84.718

70.5

91.4% Standard error 5.23 points

DAMAGE CALC

252+ SpA Rotom-Wash Hydro Pump vs. 252 HP / 252+ SpD Ferrothorn: 55-66 (15.6 - 18.7%) -- possible 8HKO

View Ferrothorn counters → Teams with Ferrothorn →

Medicham-Mega

FightingPsychic OFFENSIVE CHECK View matchup

55.949

59.1

85.6% Standard error 6.62 points

DAMAGE CALC

252+ Atk Pure Power Medicham-Mega High Jump Kick vs. 252 HP / 0 Def Rotom-Wash: 366-432 (120.3 - 142.1%) -- guaranteed OHKO

View Medicham-Mega counters →

Kartana

GrassSteel OFFENSIVE CHECK View matchup

24.141

54.4

84.1% Standard error 7.43 points

DAMAGE CALC

252+ Atk Kartana Leaf Blade vs. 252 HP / 0 Def Rotom-Wash: 392-464 (128.9 - 152.6%) -- guaranteed OHKO

View Kartana counters → Teams with Kartana →

Toxapex

PoisonWater DEFENSIVE CHECK View matchup

153.365

41.9

68.0% Standard error 6.52 points

DAMAGE CALC

252+ SpA Rotom-Wash Thunder vs. 252 HP / 252+ SpD Toxapex: 192-228 (63.1 - 75%) -- guaranteed 2HKO after Black Sludge recovery

View Toxapex counters → Teams with Toxapex →

Tapu Koko

ElectricFairy OFFENSIVE CHECK View matchup

56.51

41.0

73.1% Standard error 8.01 points

DAMAGE CALCElectric Terrain

252+ SpA Life Orb Tapu Koko Thunderbolt vs. 252 HP / 252+ SpD Rotom-Wash in Electric Terrain: 175-207 (57.5 - 68%) -- guaranteed 2HKO

View Tapu Koko counters → Teams with Tapu Koko →

Gastrodon

WaterGround DEFENSIVE CHECK View matchup

37.874

32.5

63.7% Standard error 7.81 points

Greninja

WaterDark SOFT CHECK View matchup

132.064

22.9

52.7% Standard error 7.44 points

DAMAGE CALC

252+ SpA Choice Specs Greninja Dark Pulse vs. 252 HP / 252+ SpD Rotom-Wash: 127-150 (41.7 - 49.3%) -- guaranteed 3HKO

View Greninja counters → Teams with Greninja →

Magearna

SteelFairy SOFT CHECK View matchup

77.608

14.4

53.3% Standard error 9.73 points

DAMAGE CALC

252+ SpA Magearna Fleur Cannon vs. 252 HP / 252+ SpD Rotom-Wash: 160-190 (52.6 - 62.5%) -- guaranteed 2HKO

View Magearna counters → Teams with Magearna →

Tapu Fini

WaterFairy SOFT CHECK View matchup

66.512

9.7

52.0% Standard error 10.57 points

DAMAGE CALCMisty Terrain

Tapu Fini Nature's Madness vs. 252 HP Rotom-Wash: 152-152 (50 - 50%) -- guaranteed 2HKO

View Tapu Fini counters → Teams with Tapu Fini →

Celesteela

SteelFlying SOFT CHECK View matchup

23.518

5.8

46.9% Standard error 10.29 points

DAMAGE CALC

252+ Atk Celesteela Heavy Slam (120 BP) vs. 252 HP / 0 Def Rotom-Wash: 42-50 (13.8 - 16.4%) -- possible 7HKO

View Celesteela counters → Teams with Celesteela →

Clefable

Fairy SOFT CHECK View matchup

22.693

5.3

47.2% Standard error 10.48 points

DAMAGE CALC

252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Rotom-Wash: 94-112 (30.9 - 36.8%) -- 74.7% chance to 3HKO

View Clefable counters → Teams with Clefable →

Swampert-Mega

WaterGround SOFT CHECK View matchup

75.739

0.8

39.3% Standard error 9.64 points

DAMAGE CALC

252+ Atk Swampert-Mega Superpower vs. 252 HP / 0 Def Rotom-Wash: 151-178 (49.6 - 58.5%) -- 99.6% chance to 2HKO

View Swampert-Mega counters →

Tornadus-Therian

Flying SOFT CHECK View matchup

59.083

-0.8

34.1% Standard error 8.71 points

DAMAGE CALC

252+ SpA Tornadus-Therian Focus Blast vs. 252 HP / 252+ SpD Rotom-Wash: 88-104 (28.9 - 34.2%) -- 1.9% chance to 3HKO

View Tornadus-Therian counters → Teams with Tornadus-Therian →

Landorus-Therian

GroundFlying SOFT CHECK View matchup

186.779

-2.7

15.3% Standard error 4.48 points

DAMAGE CALC

252+ Atk Landorus-Therian Explosion vs. 252 HP / 0 Def Rotom-Wash: 306-360 (100.6 - 118.4%) -- guaranteed OHKO

View Landorus-Therian counters → Teams with Landorus-Therian →

Heatran

FireSteel SOFT CHECK View matchup

87.947

-4.8

28.4% Standard error 8.31 points

DAMAGE CALC

252+ SpA Heatran Magma Storm vs. 252 HP / 252+ SpD Rotom-Wash: 62-73 (20.3 - 24%) -- 98.9% chance to 3HKO after trapping damage

View Heatran counters → Teams with Heatran →

Skarmory

SteelFlying SOFT CHECK View matchup

34.932

-6.3

1.3% Standard error 1.89 points

DAMAGE CALC

252+ Atk Skarmory Brave Bird vs. 252 HP / 0 Def Rotom-Wash: 73-87 (24 - 28.6%) -- 97.4% chance to 4HKO

View Skarmory counters →

Gliscor

GroundFlying SOFT CHECK View matchup

25.53

-13.6

13.2% Standard error 6.70 points

DAMAGE CALC

252+ Atk Gliscor Knock Off (97.5 BP) vs. 252 HP / 0 Def Rotom-Wash: 89-105 (29.2 - 34.5%) -- 4.8% chance to 3HKO

View Gliscor counters → Teams with Gliscor →

Excadrill

GroundSteel SOFT CHECK View matchup

21.927

-13.6

21.4% Standard error 8.76 points

DAMAGE CALC

252+ Atk Excadrill Rock Slide vs. 252 HP / 0 Def Rotom-Wash: 88-104 (28.9 - 34.2%) -- 1.9% chance to 3HKO

View Excadrill counters → Teams with Excadrill →

Ranked #31 with 6.49% usage. Sorted by conservative score.