#0080 · Gen 1

Slowbro (Galar) — Best counters

Weaknesses

	Pokémon	Fast move	Charged move	Weather	Score
1	Gengar (Mega)	ghostLickELITE	ghostShadow Ball	Fog	10013.0
2	Groudon (Primal)	groundMud Shot	groundPrecipice BladesELITE	Clear	9812.7
3	Absol (Mega)	darkSnarl	darkBrutal SwingELITE	Fog	9111.8
4	Banette (Mega)	ghostHex	ghostShadow Ball	Fog	8711.3
5	Garchomp (Mega)	groundMud Shot	groundEarthquake	Clear	8711.3
6	Blacephalon	ghostAstonish	ghostShadow Ball	Fog	8511.1
7	Landorus (Therian)	groundMud Shot	groundSandsear StormELITE	Clear	8511.0
8	Tyranitar (Mega)	darkBite	darkBrutal Swing	Fog	8410.9
9	Houndoom (Mega)	darkSnarl	darkFoul Play	Fog	8110.5
10	Alakazam (Mega)	psychicPsycho Cut	ghostShadow Ball	Fog · partial	8010.4
11	Darkrai	darkSnarl	ghostShadow Ball	Fog	7710.0
12	Chandelure	ghostHex	ghostShadow Ball	Fog	769.8
13	Zoroark (Hisui)	darkSnarl	ghostShadow Ball	Fog	769.8
14	Groudon	groundMud Shot	groundPrecipice BladesELITE	Clear	759.7
15	Gengar	ghostLickELITE	ghostShadow Ball	Fog	759.7
16	Deoxys (Attack)	psychicZen Headbutt	darkDark Pulse	Fog · partial	749.5
17	Swampert (Mega)	groundMud Shot	groundEarthquake	Clear	739.4
18	Dragapult	ghostAstonish	ghostShadow Ball	Fog	729.3
19	Absol	darkSnarl	darkBrutal SwingELITE	Fog	719.3
20	Excadrill	groundMud Slap	groundEarthquake	Clear	719.2

Slowbro (Galar) is weak to Ground (×1.6), Ghost (×1.6), Dark (×1.6).
Watch its Psychic/Poison/Fighting/Water/Dark moves — counters like Gengar (Mega) and Groudon (Primal) take super-effective damage from them.
Fog weather boosts Ghost moves ×1.2 — the best time to battle Slowbro (Galar).

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