Poison type
Poison-type Pokémon are weak to Ground and Psychic moves. They resist Grass, Fighting, Poison, Bug, and Fairy. Poison moves are super effective against Grass and Fairy.

Poison weaknesses
Moves used against a Poison-type Pokémon
Poison moves
Poison moves against each type
Every Poison-type Pokémon
Bulbasaur
Ivysaur
Venusaur
Mega Venusaur
Weedle
Kakuna
Beedrill
Mega Beedrill
Ekans
Arbok
Nidoran♀
Nidorina
Nidoqueen
Nidoran♂
Nidorino
Nidoking
Zubat
Golbat
Oddish
Gloom
Vileplume
Venonat
Venomoth
Bellsprout
Weepinbell
Victreebel
Mega Victreebel
Tentacool
Tentacruel
Galarian Slowbro
Grimer
Alolan Grimer
Muk
Alolan Muk
Gastly
Haunter
Gengar
Mega Gengar
Koffing
Weezing
Galarian Weezing
Spinarak
Ariados
Crobat
Paldean Wooper
Galarian Slowking
Qwilfish
Hisuian Qwilfish
Hisuian Sneasel
Dustox
Roselia
Gulpin
Swalot
Seviper
Budew
Roserade
Stunky
Skuntank
Skorupi
Drapion
Croagunk
Toxicroak
Venipede
Whirlipede
Scolipede
Mega Scolipede
Trubbish
Garbodor
Foongus
Amoonguss
Skrelp
Dragalge
Mega Dragalge
Mareanie
Toxapex
Salandit
Salazzle
Nihilego
Poipole
Naganadel
Toxel
Toxtricity
Toxtricity (Low Key Form)
Eternatus
Eternatus (Eternamax)
Sneasler
Overqwil
Shroodle
Grafaiai
Varoom
Revavroom
Glimmet
Glimmora
Mega Glimmora
Clodsire
Iron Moth
Okidogi
Munkidori
Fezandipiti
Pecharunt