Is Rotom-Wash viable in Gen 7 OU?

Rotom-Wash is ranked #32 in Gen 7 OU with 6.10% usage according to Smogon Jul 2026 - Sep 2026 data.

What beats Rotom-Wash in Gen 7 OU?

Ferrothorn has the strongest conservative score in this observed Jul 2026 - Sep 2026 sample. The target was knocked out or switched out in 91.7% of 53.42350156298906 relevant encounters. Standard error is 3.8 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 · Smogon source period Jul 2026 - Sep 2026

#0479 Rotom-Wash

ElectricWater

USAGE 6.1% #32

ABILITYLevitate

BASE STATS

HP 50

ATK 65

DEF 107

SPA 105

SPD 107

SPE 86

BST520

TYPE MATCHUPS

2×

GrassGround

½×

FireWaterIceFlying

¼×

Steel

Moves

Hydro Pump 99.7% Volt Switch 99.4% Defog 75.5% Will-O-Wisp 63.6% Pain Split 27.7% Thunder Wave 21.8% Toxic 6.9% Thunder 2.6%

Items

Wiki Berry 25.8% Leftovers 25.4% Iapapa Berry 21.8% Waterium Z 18.8% Aguav Berry 3.0% Electrium Z 2.7% Choice Scarf 1.5% Zap Plate 0.5%

Abilities

Levitate100.0%

Common Teammates

Landorus-Therian72.3%

Browse Gen 7 OU teams using Rotom-Wash →

Explore Rotom-Wash + Ferrothorn teams 77 score Explore Rotom-Wash + Toxapex teams 59 score Explore Rotom-Wash + Tapu Koko teams 56 score Explore Rotom-Wash + Chansey teams 39 score Explore Rotom-Wash + Greninja teams 36 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 72.3% 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

53.424

76.6

91.7% Standard error 3.77 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 →

Toxapex

PoisonWater DEFENSIVE CHECK View matchup

120.534

59.2

75.0% Standard error 3.95 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

28.293

56.5

84.0% Standard error 6.89 points

DAMAGE CALCElectric Terrain

252+ SpA Tapu Koko Thunderbolt vs. 252 HP / 252+ SpD Rotom-Wash in Electric Terrain: 135-159 (44.4 - 52.3%) -- 14.8% chance to 2HKO

View Tapu Koko counters → Teams with Tapu Koko →

Medicham-Mega

FightingPsychic OFFENSIVE CHECK View matchup

25.034

53.8

83.5% Standard error 7.42 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 →

Chansey

Normal DEFENSIVE CHECK View matchup

22.298

39.4

75.7% Standard error 9.08 points

DAMAGE CALC

252+ SpA Rotom-Wash Hydro Pump vs. 252 HP / 252+ SpD Eviolite Chansey: 79-94 (11.2 - 13.3%) -- possible 8HKO

View Chansey counters → Teams with Chansey →

Greninja

WaterDark OFFENSIVE CHECK View matchup

95.44

36.2

56.5% Standard error 5.08 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 OFFENSIVE CHECK View matchup

22.948

17.3

58.5% Standard error 10.29 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 →

Heatran

FireSteel SOFT CHECK View matchup

77.472

13.0

34.7% Standard error 5.41 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 →

Tapu Fini

WaterFairy SOFT CHECK View matchup

20.104

10.5

54.9% Standard error 11.10 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 →

Swampert-Mega

WaterGround SOFT CHECK View matchup

58.687

9.8

34.6% Standard error 6.21 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 →

Landorus-Therian

GroundFlying SOFT CHECK View matchup

121.281

3.4

17.0% Standard error 3.41 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 →

Tornadus-Therian

Flying SOFT CHECK View matchup

20.104

-5.0

38.4% Standard error 10.85 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 →

Gliscor

GroundFlying SOFT CHECK View matchup

24.96

-14.1

10.9% Standard error 6.23 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 →

Ranked #32 with 6.10% usage. Sorted by conservative score.