#0593 · Gen 5

Jellicent (Male) — Best counters

Weaknesses

ghost×1.60grass×1.60electric×1.60dark×1.60

	Pokémon	Fast move	Charged move	Weather	Score
1	Regieleki	normalLock On	electricThunder CageELITE	Rainy · partial	10013.0
2	Gengar (Mega)	ghostLickELITE	ghostShadow Ball	Fog	10013.0
3	Sceptile (Mega)	grassBullet Seed	grassFrenzy PlantELITE	Clear	9312.1
4	Absol (Mega)	darkSnarl	darkBrutal SwingELITE	Fog	9111.8
5	Banette (Mega)	ghostHex	ghostShadow Ball	Fog	8711.3
6	Kartana	grassRazor Leaf	grassLeaf Blade	Clear	8611.2
7	Blacephalon	ghostAstonish	ghostShadow Ball	Fog	8511.1
8	Manectric (Mega)	electricThunder Fang	electricWild Charge	Rainy	8511.0
9	Tyranitar (Mega)	darkBite	darkBrutal Swing	Fog	8410.9
10	Xurkitree	electricThunder Shock	electricDischarge	Rainy	8310.8
11	Houndoom (Mega)	darkSnarl	darkFoul Play	Fog	8110.5
12	Ampharos (Mega)	electricVolt Switch	electricZap Cannon	Rainy	8110.5
13	Gardevoir (Mega)	grassMagical Leaf	ghostShadow Ball	Fog · partial	8110.5
14	Alakazam (Mega)	psychicPsycho Cut	ghostShadow Ball	Fog · partial	8010.4
15	Zekrom	electricCharge Beam	electricFusion BoltELITE	Rainy	8010.3
16	Deoxys (Attack)	psychicZen Headbutt	electricZap Cannon	Rainy · partial	7910.2
17	Shaymin (Sky)	grassMagical Leaf	grassGrass Knot	Clear	7810.1
18	Darkrai	darkSnarl	ghostShadow Ball	Fog	7710.0
19	Kyurem (Black)	ghostShadow Claw	electricFusion Bolt	Rainy · partial	779.9
20	Venusaur (Mega)	grassVine Whip	grassFrenzy PlantELITE	Clear	769.9

Jellicent (Male) is weak to Ghost (×1.6), Grass (×1.6), Electric (×1.6), Dark (×1.6).
Watch its Water/Ghost/Ice moves — counters like Gengar (Mega) and Sceptile (Mega) take super-effective damage from them.
Rainy weather boosts Electric moves ×1.2 — the best time to battle Jellicent (Male).

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