Poison-type Pokémon have some 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.
Poison types are also immune to the Poison status effect themselves.
Abilities of Poison Pokémon
- Chlorophyll - This is a Grass-type ability
- Clear Body - Just the Tentacool family
- Compoundeyes - Just Venonat (This is a Bug-type ability)
- Inner Focus - Just the Zubat family
- Intimidate - Just the Ekans family
- Levitate
- Liquid Ooze
- Natural Cure - Just Roselia
- Overgrow - Just the Bulbasaur family
- Poison Point
- Shed Skin
- Shield Dust - This is a Bug-type ability
- Stench - A unique ability to the Grimer family
- Swarm - This is a Bug-type ability
Poison Pokémon Families
| Basic | Stage 1 | Stage 2 | Other type |
| Bulbasaur | Ivysaur | Venusaur | Grass |
| Weedle | Kakuna | Beedrill | Bug |
| Ekans | Arbok | ||
| Nidoran♀ | Nidorina | Nidoqueen | Nidoqueen is Ground |
| Nidoran♂ | Nidorino | Nidoking | Nidoking is Ground |
| Zubat | Golbat | Crobat | |
| Oddish | Gloom | Vileplume | 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 | Cacsoon | Dustox | This family is Bug; only Dustox is Poison. |
| Roselia | Grass | ||
| Gulpin | Swalot | ||
| Seviper |