Fire-Types such as...
Vulpix Growlithe Ponyta Ninetales Arcanine Rapidash
Poison and Steel type moves are good against Fairy type Pokemon.
ground type Pokemon are super effective against poison type Pokemon.
Poison is strong against grass type Pokémon.
Psycic Pokemon are weak against Ghost type, Bug type and Dark type. Psychic types are good against Fighting and Poison types since Pokemon Gold (and onward)
Poison types are weak against Ground and Psychic types.
Poison and Steel type moves are good against Fairy type Pokemon.
ground type Pokemon are super effective against poison type Pokemon.
ground and physic Pokemon are super effective against poison Pokemon
Poison is strong against grass type Pokémon.
Psycic Pokemon are weak against Ghost type, Bug type and Dark type. Psychic types are good against Fighting and Poison types since Pokemon Gold (and onward)
grass,poison think that's it
Poison is doubly super effective. I think fire is also
Poison types are weak against Ground and Psychic types.
Ground and psychic type attacks are both super-effective against a poison type pokemon.
It depends on what type of Pokemon you are up against, and what type moves it's got. Dark type - super effective against phsycic, poison super effective against grass. Hope this helps! :)
Fairy-type Pokemon are weak against Steel and Poison-type attacks.
Grass Pokemon are weak against Fire, Ice, psychic, Poison, Flying, and Bug type moves. The effectiveness of these types of attacks may be increased or decreased if the Pokemon has two types. For example, Bulbasaur is a dual Grass / Poison, so Poison attacks are not as effective.