#0839 · Gen 8

Coalossal (Gmax) — Best counters

Weaknesses

ground×2.56 double weaknesswater×2.56 double weaknessfighting×1.60rock×1.60

	Pokémon	Fast move	Charged move	Weather	Score
1	Kyogre (Primal)	waterWaterfall	waterOrigin PulseELITE	Rainy	10020.7
2	Groudon (Primal)	groundMud Shot	groundPrecipice BladesELITE	Clear	9820.4
3	Garchomp (Mega)	groundMud Shot	groundEarthquake	Clear	8718.1
4	Landorus (Therian)	groundMud Shot	groundSandsear StormELITE	Clear	8517.6
5	Swampert (Mega)	waterWater Gun	waterHydro CannonELITE	Rainy	8417.4
6	Blastoise (Mega)	waterWater Gun	waterHydro CannonELITE	Rainy	7816.2
7	Gyarados (Mega)	waterWaterfall	waterHydro Pump	Rainy	7716.0
8	Sharpedo (Mega)	waterWaterfall	waterHydro Pump	Rainy	7615.8
9	Kyogre	waterWaterfall	waterOrigin PulseELITE	Rainy	7615.8
10	Groudon	groundMud Shot	groundPrecipice BladesELITE	Clear	7515.6
11	Excadrill	groundMud Slap	groundEarthquake	Clear	7114.8
12	Quaquaval	waterWater Gun	waterHydro CannonELITE	Rainy	7014.5
13	Mamoswine	groundMud Slap	groundHigh Horsepower	Clear	7014.4
14	Greninja	waterWater Shuriken	waterHydro CannonELITE	Rainy	6914.4
15	Kingler	waterBubble	waterCrabhammer	Rainy	6914.2
16	Heracross (Mega)	fightingCounter	groundEarthquake	Clear · partial	6814.2
17	Rhyperior	groundMud Slap	groundEarthquake	Clear	6713.9
18	Garchomp	groundMud Shot	groundEarthquake	Clear	6713.9
19	Lucario (Mega)	fightingForce PalmELITE	fightingAura Sphere	Overcast	6713.9
20	Primarina	waterWaterfall	waterHydro CannonELITE	Rainy	6713.8

Ground and Water hits for ×2.56 — Coalossal (Gmax)'s Rock/Fire typing is double-weak, so those attackers outperform their score gap.
Rainy weather boosts Water moves ×1.2 — the best time to battle Coalossal (Gmax).

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