Poison-type Pokémon have a toxic quality about them, be it because they produce venom (Ekans and Arbok for example), are poisonous plants (Bulbasaur and Oddish – these are dual Grass-and-Poison types), or have some sort of general toxicity about them (such as Koffing or Grimer). Many Poison-type moves can cause the Poison status effect, which causes the attacked Pokémon to lose hit points each turn. The Toxic or 'badly poisoned' status effect causes the amount of damage done by the poison to double each turn. Some Poison Pokémon are considered to represent a forms of pollution such as Koffing/Weezing (air pollution) and Grimer/Muk (toxic waste). Poison-types are immune to the Poisoned status effect.

Weaknesses and resistance

A type chart displaying the weaknesses and resistance of a Pokémon when damaged by a move. Empty fields are moves that do normal damage.

	Move Type
	½				½				½	×2			½	×2
	½				¼	×2	×2		¼				½	×2	×2
		½						½	½	×2			½	×0
	½	½			½		×2		½	×2			½	×4	½
	¼			×2	¼				¼	×0	×2		½	×2	×2
	¼	×2			×0			×2	½	×2		×0	¼	×2
				½	½	×2	×2		¼		×2			×2			½
	½			×0	½					×2	×2		¼	×2	½		×2
	½			×2	½	½	½			×2			½	×2		½	½

Abilities of Poison Pokémon

Natural

• Aftermath - Just the Stunky family.
• Anticipation - Just the Croagunk family; This is a Ground/Bug ability.
• Battle Armor - Just the Skorupi family; This is a Rock ability.
• Chlorophyll - This is a Grass ability.
• Clear Body - Just the Tentacool family; This is a Steel ability.
• Compoundeyes - Just Venonat; This is a Bug ability.
• Dry Skin - Just the Croagunk family.
• Effect Spore - Just the Foongus family; This is a Grass ability.
• Inner Focus - Just the Zubat family; This is a Fighting ability.
• Insomnia - Just the Spinarak family; This is a Flying ability.
• Intimidate - Just the Ekans family; This is a Normal ability.
• Levitate - This is a Psychic ability.
• Liquid Ooze
• Multitype - Unique to Arceus (Poison Arceus).
• Natural Cure - Just the Budew family; This is a Grass ability.
• Overgrow - Just the Bulbasaur family; This is a Grass ability.
• Poison Point
• Rivalry
• Shed Skin - This is a Bug ability.
• Shield Dust - This is a Bug ability.
• Sniper - Just the Skorupi family; This is a Water ability.
• Stench
• Sticky Hold
• Swift Swim - Just Qwilfish; This is a Water ability.
• Swarm - This is a Bug ability.
• Tinted Lens - Just the Venonat family; This is a Bug ability.
• Weak Armor - Unique to Garbodor.

Dream World

• Gluttony
• Hustle - This is a Normal ability.
• Infiltrator - This is a Flying ability.
• Keen Eye - This is a Flying ability.
• Leaf Guard - Just the Budew family (Not Roserade); This is a Grass ability.
• Poison Touch
• Quick Feet - Just the Venipede family; This is a Normal ability.
• Rain Dish - Just the Tentacool family; This is a Water ability.
• Regenerator - Just the Foongus family; This is a Psychic ability.
• Run Away - This is a Normal ability.
• Sheer Force - This is a Fighting/Ground/Water ability.
• Technician - Just Roserade; This is a Normal ability.
• Unnerve - Just the Ekans family; This is a Bug ability.
• Wonder Skin - Just Venomoth; This is a Normal ability.

Poison Pokémon Families

Unevolved	First evolution	Second evolution	Other type
Bulbasaur	Ivysaur	Venusaur	Grass
Weedle	Kakuna	Beedrill	Bug
Ekans	Arbok
Nidoran♀	Nidorina	Nidoqueen	Only Nidoqueen is Ground
Nidoran♂	Nidorino	Nidoking	Only Nidoking is Ground
Zubat	Golbat	Crobat	Flying
Oddish	Gloom	Vileplume	Grass
		Bellossom	Bellossom is only Grass
Venonat	Venomoth		Bug
Bellsprout	Weepinbell	Victreebel	Grass
Tentacool	Tentacruel		Water
Grimer	Muk
Gastly	Haunter	Gengar	Ghost
Koffing	Weezing
Spinarak	Ariados		Bug
Qwilfish			Water
Wurmple	Cascoon	Dustox	Bug; Only Dustox is Poison
Budew	Roselia	Roserade	Grass
Gulpin	Swalot
Seviper
Stunky	Skuntank		Dark
Skorupi	Drapion		Skorupi is Bug; Drapion is Dark
Croagunk	Toxicroak		Fighting
Venipede	Whirlipede	Scolipede	Bug
Trubbish	Garbodor
Foongus	Amoonguss		Grass

Trivia

• There has only been one Poison-type gym, which is located in Fuchsia City in Kanto, although on April 12th 2012 it was revealed in CoroCoro that in Black 2 and White 2 there would be a Poison type gym in the renovated Unova.