#0721 · Gen 6 · Mythical

Volcanion — Best counters

Weaknesses

	Pokémon	Fast move	Charged move	Weather	Score
1	Regieleki	normalLock On	electricThunder CageELITE	Rainy · partial	10013.3
2	Groudon (Primal)	groundMud Shot	groundPrecipice BladesELITE	Clear	9612.7
3	Diancie (Mega)	rockRock Throw	rockRock Slide	Partly Cloudy	8611.5
4	Garchomp (Mega)	groundMud Shot	groundEarthquake	Clear	8511.3
5	Landorus (Therian)	groundMud Shot	groundSandsear StormELITE	Clear	8311.0
6	Manectric (Mega)	electricThunder Fang	electricWild Charge	Rainy	8211.0
7	Xurkitree	electricThunder Shock	electricDischarge	Rainy	8110.8
8	Ampharos (Mega)	electricVolt Switch	electricZap Cannon	Rainy	7910.5
9	Zekrom	electricCharge Beam	electricFusion BoltELITE	Rainy	7810.3
10	Deoxys (Attack)	psychicZen Headbutt	electricZap Cannon	Rainy · partial	7710.2
11	Tyranitar (Mega)	rockSmack DownELITE	rockStone Edge	Partly Cloudy	7610.2
12	Aerodactyl (Mega)	rockRock Throw	rockRock Slide	Partly Cloudy	749.8
13	Groudon	groundMud Shot	groundPrecipice BladesELITE	Clear	739.7
14	Rampardos	rockSmack Down	rockRock Slide	Partly Cloudy	729.7
15	Thundurus (Therian)	electricVolt Switch	electricThunderbolt	Rainy	729.6
16	Swampert (Mega)	groundMud Shot	groundEarthquake	Clear	719.4
17	Excadrill	groundMud Slap	groundEarthquake	Clear	699.2
18	Deoxys (Normal)	electricCharge Beam	electricThunderbolt	Rainy	699.2
19	Eternatus	poisonPoison Jab	dragonDynamax CannonELITE	Windy · partial	699.2
20	Kyurem (Black)	dragonDragon Tail	electricFusion Bolt	Rainy · partial	699.1

Volcanion is weak to Ground (×1.6), Rock (×1.6), Electric (×1.6).
Watch its Fire/Water/Normal/Ground/Poison moves — counters like Regieleki and Groudon (Primal) take super-effective damage from them.
Rainy weather boosts Electric moves ×1.2 — the best time to battle Volcanion.

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