what is poison weak to

Poison-type Pokémon are weak to Ground and Psychic-type moves. They suffer double damage from moves of each type). This means that Ground and Psychic-type moves are particularly effective against Poison-type Pokémon in battles. Ground-type moves, such as Earthquake, can be especially destructive against Poison-type Pokémon, while Psychic-type moves can also deal significant damage. Its important for trainers to consider these weaknesses when strategizing in battles involving Poison-type Pokémon.