#0103 · Gen 1

Exeggutor — Best counters

Weaknesses

bug×2.56 double weaknessflying×1.60poison×1.60ghost×1.60fire×1.60ice×1.60dark×1.60

	Pokémon	Fast move	Charged move	Weather	Score
1	Heracross (Mega)	bugStruggle Bug	bugMegahorn	Rainy	10017.2
2	Pheromosa	bugBug Bite	bugBug Buzz	Rainy	9917.0
3	Pinsir (Mega)	bugBug Bite	bugX Scissor	Rainy	9115.6
4	Beedrill (Mega)	bugBug BiteELITE	bugX Scissor	Rainy	9015.5
5	Volcarona	bugBug Bite	bugBug Buzz	Rainy	8214.2
6	Scizor (Mega)	bugFury Cutter	bugX Scissor	Rainy	8113.9
7	Absol (Mega)	darkSnarl	bugMegahorn	Rainy · partial	8013.7
8	Blaziken (Mega)	fireFire Spin	fireBlast BurnELITE	Clear	7613.2
9	Vikavolt	bugBug Bite	bugX Scissor	Rainy	7513.0
10	Gengar (Mega)	ghostLickELITE	ghostShadow Ball	Fog	7513.0
11	Charizard (Mega Y)	fireFire Spin	fireBlast BurnELITE	Clear	7412.8
12	Kleavor	bugFury Cutter	bugX Scissor	Rainy	7312.6
13	Genesect	bugFury Cutter	bugX Scissor	Rainy	7312.6
14	Yanmega	bugBug Bite	bugBug Buzz	Rainy	7212.4
15	Escavalier	bugBug Bite	bugMegahorn	Rainy	7212.4
16	Frosmoth	bugBug Bite	bugBug Buzz	Rainy	7212.4
17	Rayquaza (Mega)	flyingAir Slash	flyingHurricaneELITE	Windy	7112.2
18	Pinsir	bugBug Bite	bugX Scissor	Rainy	7112.2
19	Heracross	bugStruggle Bug	bugMegahorn	Rainy	7012.1
20	Centiskorch	bugBug Bite	bugBug Buzz	Rainy	6911.8

Bug hits for ×2.56 — Exeggutor's Grass/Psychic typing is double-weak, so those attackers outperform their score gap.
Watch its Grass/Psychic moves — counters like Heracross (Mega) and Pheromosa take super-effective damage from them.
Rainy weather boosts Bug moves ×1.2 — the best time to battle Exeggutor.

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