Ground types and psychic types beat poison types.
It is a hybrid between grass and ground
Nidoqueen is the dual Poison/Ground-type Pokemon.
Poison is strong against Grass. It's weak against Poison, Ground, Rock, and Ghost. It can't affect Steel. Ground and Psychic are strong against Poison. Grass, Fighting, Poison, and Bug are weak against Poison.
Electric, Fire, Poison, Rock, Steel
Psychic and Ground
ground and physic Pokemon are super effective against poison Pokemon
for poison it's ground. for water it's either electric or grass.
Ground types and psychic types beat poison types.
Ground type Pokémon beat fire, steel, rock, electric and poison type Pokémon.
Since Team Rocket specializes in Poison-type Pokemon, I'd say you use Ground-type.
Poison type Pokemon are weak against psychic types and ground (unless flying as it doesn't affect). Trust me I beat lv. 51 golbat with my lugias extrasensory.
Poison type Pokemon are weak to psychic and ground type moves.
The weaknesses of poison types are psychic and ground.
Poison is strong against grass type Pokémon.
Psychic and Ground type.
Psychich and Ground.