Water, ice, grass.
Ground and Psychic
Ground and psychic type attacks are both super-effective against a poison type pokemon.
Ice, grass, and water.
they don't affect it
Fire is super effective against bug, grass, and steel
Ground type is super effective against electric, fire and rock type Pokémon.
Ground
Ground-types are super effective against electric-type Pokémon.
ground type Pokemon are super effective against poison type Pokemon.
Actually the Ground is the only super effective type against thunder type pokemon.
ground types.
Ground and Psychic
Ground and psychic type attacks are both super-effective against a poison type pokemon.
ground bug
Ground, Fire, and Fighting.
Psychic and Ground attacks.
Water, Ground, Rock