#0047 · Gen 1

Parasect — Best counters

Weaknesses

flying×2.56 double weaknessfire×2.56 double weaknesspoison×1.60rock×1.60bug×1.60ice×1.60

	Pokémon	Fast move	Charged move	Weather	Score
1	Blaziken (Mega)	fireFire Spin	fireBlast BurnELITE	Clear	10021.1
2	Charizard (Mega Y)	fireFire Spin	fireBlast BurnELITE	Clear	9720.4
3	Rayquaza (Mega)	flyingAir Slash	flyingHurricaneELITE	Windy	9319.5
4	Blacephalon	fireIncinerate	fireOverheat	Clear	8918.8
5	Salamence (Mega)	fireFire Fang	flyingFly	Windy · partial	8818.5
6	Pidgeot (Mega)	flyingGustELITE	flyingBrave Bird	Windy	8718.3
7	Reshiram	fireFire Fang	fireFusion FlareELITE	Clear	8517.9
8	Charizard (Mega X)	fireFire Spin	fireBlast BurnELITE	Clear	8317.5
9	Salamence	fireFire Fang	flyingFly	Windy · partial	7816.5
10	Chandelure	fireFire Spin	fireOverheat	Clear	7816.4
11	Houndoom (Mega)	fireFire Fang	fireFire Blast	Clear	7816.4
12	Tornadus (Therian)	flyingGust	flyingBleakwind StormELITE	Windy	7616.1
13	Volcarona	fireFire Spin	fireOverheat	Clear	7616.0
14	Darmanitan (Standard)	fireFire Fang	fireOverheat	Clear	7616.0
15	Kyurem (White)	iceIce Fang	fireFusion Flare	Clear · partial	7315.5
16	Ho Oh	fireIncinerate	fireSacred FireELITE	Clear	7315.4
17	Blaziken	fireFire Spin	fireBlast BurnELITE	Clear	7315.4
18	Yveltal	flyingGust	flyingOblivion WingELITE	Windy	7315.4
19	Staraptor	flyingGustELITE	flyingBrave Bird	Windy	7315.3
20	Moltres	fireFire Spin	fireOverheat	Clear	7215.2

Flying and Fire hits for ×2.56 — Parasect's Bug/Grass typing is double-weak, so those attackers outperform their score gap.
Clear weather boosts Fire moves ×1.2 — the best time to battle Parasect.

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