#0197 · Gen 2

Umbreon — Best counters

Weaknesses

	Pokémon	Fast move	Charged move	Weather	Score
1	Lucario (Mega)	fightingForce PalmELITE	fightingAura Sphere	Overcast	10013.9
2	Blaziken (Mega)	fightingCounter	fightingFocus Blast	Overcast	8712.1
3	Heracross (Mega)	fightingCounter	bugMegahorn	Rainy · partial	8612.0
4	Gardevoir (Mega)	fairyCharm	fairyDazzling Gleam	Overcast	8211.4
5	Pheromosa	bugBug Bite	fightingFocus Blast	Overcast · partial	8211.4
6	Alakazam (Mega)	fightingCounterELITE	fightingFocus Blast	Overcast	8111.2
7	Lucario	fightingForce PalmELITE	fightingAura Sphere	Overcast	7610.6
8	Lopunny (Mega)	fightingDouble Kick	fightingFocus Blast	Overcast	7510.4
9	Gallade (Mega)	fightingLow Kick	fightingClose Combat	Overcast	7410.3
10	Zacian (Crowned)	steelMetal Claw	fairyPlay Rough	Overcast · partial	7310.2
11	Latios (Mega)	dragonDragon Breath	fightingAura Sphere	Overcast · partial	7210.0
12	Terrakion	fightingDouble Kick	fightingSacred SwordELITE	Overcast	7210.0
13	Enamorus (Incarnate)	fairyFairy Wind	fairyDazzling Gleam	Overcast	709.8
14	Pinsir (Mega)	bugBug Bite	bugX Scissor	Rainy	709.8
15	Latias (Mega)	fairyCharm	fightingAura Sphere	Overcast	709.7
16	Beedrill (Mega)	bugBug BiteELITE	bugX Scissor	Rainy	709.7
17	Keldeo (Ordinary)	fightingLow Kick	fightingSacred Sword	Overcast	689.4
18	Keldeo (Resolute)	fightingLow Kick	fightingSacred Sword	Overcast	689.4
19	Urshifu (Single Strike)	fightingCounter	fightingDynamic Punch	Overcast	679.4
20	Urshifu (Rapid Strike)	fightingCounter	fightingDynamic Punch	Overcast	679.4

Umbreon is weak to Fighting (×1.6), Bug (×1.6), Fairy (×1.6).
Watch its Dark/Normal/Psychic moves — counters like Blaziken (Mega) and Heracross (Mega) take super-effective damage from them.
Overcast weather boosts Fighting moves ×1.2 — the best time to battle Umbreon.

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