#0479 · Gen 4

Rotom (Wash) — Best counters

Weaknesses

	Pokémon	Fast move	Charged move	Weather	Score
1	Groudon (Primal)	groundMud Shot	groundPrecipice BladesELITE	Clear	10012.7
2	Sceptile (Mega)	grassBullet Seed	grassFrenzy PlantELITE	Clear	9512.1
3	Garchomp (Mega)	groundMud Shot	groundEarthquake	Clear	8911.3
4	Kartana	grassRazor Leaf	grassLeaf Blade	Clear	8811.2
5	Landorus (Therian)	groundMud Shot	groundSandsear StormELITE	Clear	8611.0
6	Shaymin (Sky)	grassMagical Leaf	grassGrass Knot	Clear	7910.1
7	Venusaur (Mega)	grassVine Whip	grassFrenzy PlantELITE	Clear	779.9
8	Groudon	groundMud Shot	groundPrecipice BladesELITE	Clear	769.7
9	Swampert (Mega)	groundMud Shot	groundEarthquake	Clear	749.4
10	Roserade	grassMagical Leaf	grassLeaf Storm	Clear	749.4
11	Zarude	grassVine Whip	grassPower Whip	Clear	739.3
12	Xurkitree	electricThunder Shock	grassPower Whip	Clear · partial	739.3
13	Excadrill	groundMud Slap	groundEarthquake	Clear	729.2
14	Eternatus	poisonPoison Jab	dragonDynamax CannonELITE	Windy · partial	729.2
15	Mamoswine	groundMud Slap	groundHigh Horsepower	Clear	719.0
16	Latios (Mega)	dragonDragon Breath	grassSolar Beam	Clear · partial	709.0
17	Gallade (Mega)	psychicPsycho Cut	grassLeaf Blade	Clear · partial	708.9
18	Heracross (Mega)	fightingCounter	groundEarthquake	Clear · partial	708.9
19	Meowscarada	grassLeafage	grassFrenzy PlantELITE	Clear	698.8
20	Regigigas	normalHidden Power	normalCrush GripELITE	Partly Cloudy	698.8

Rotom (Wash) is weak to Ground (×1.6), Grass (×1.6).
Watch its Ghost/Electric/Water moves — counters like Groudon (Primal) and Landorus (Therian) take super-effective damage from them.
Clear weather boosts Ground moves ×1.2 — the best time to battle Rotom (Wash).

Rankings are estimated cycle DPS (attack stat × move damage ÷ cycle time, with STAB and type effectiveness). Not a full battle simulation.