Psychic and Ground
Poison is strong against grass type Pokémon.
fire, ice, poison, flying, or bug types
Any fire type pokemon, or a pokemon with a fire type move, I think poison too...
Almost any type can defeat a Fairy-type Pokemon, but its weaknesses are Poison and Steel. They are immune to Dragon and halves the damage to Bug, Fighting, and Dark-type moves.
A Poison/Ground-type Pokemon is weak to Psychic, Ground, Water, and Ice-type attacks. Nidoking and Nidoqueen are the only two Pokemon with this typing.
ground and physic Pokemon are super effective against poison Pokemon
Psychic and Ground
Poison is strong against grass type Pokémon.
Poison/Water
Poison/Water
beat the gym leader
1.Fighting Types 2.Poison
Yes any water pokemon can beat any other water pokemon. it's all about level and power of the attack.
Electric
You have to level your pokemon until 50-80.There are ice,rock,fight,poison,ghost and dragon.So you have to use thunder,phsyic,ice,water or grass.
Ground types and psychic types beat poison types.