Poison and Steel type moves are good against Fairy type Pokemon.
Poison, Fighting, Bug and Ghost.
Poison-Type moves are only strong against Grass-Types. Poison-Type Pokémon are strong against Grass-Types, Bug-Types, Fighting-Types, and other Poison-Types.
ground type Pokemon are super effective against poison type Pokemon.
Poison is strong against grass type Pokémon.
Poison and Steel type moves are good against Fairy type Pokemon.
Poison, Fighting, Bug and Ghost.
Poison-Type moves are only strong against Grass-Types. Poison-Type Pokémon are strong against Grass-Types, Bug-Types, Fighting-Types, and other Poison-Types.
ground type Pokemon are super effective against poison type Pokemon.
Poison is strong against grass type Pokémon.
Ground and psychic type attacks are both super-effective against a poison type pokemon.
grass,poison think that's it
psychic
Poison types are weak against Ground and Psychic types.
Poison is doubly super effective. I think fire is also
It could be but it's very unlikely. This is what I recommend you do: You should have a fire type because it is strong against the ice type (moltres is good as it also can learn flying type which is good against the fighting type) You should have a psychic type because it's strong against ghost types (Alakazam is good) Electric type is good against the water/ice type (zapdos is good) This way you have strong pokemon against the ice/water type, the rock/fighting type, the ghost/poison type, and the dragon type. (fire and electric for the ice/water) (lying and water type for the rock/fighting type) (psychic against the ghost/poison type) (dragon type moves against the dragon pokemon)
Fire, Ice, Bug, Flying, and Poison. To cover these weaknesses, teach it a rock type move to wipe out the first four. There aren't many poison types out there, so you should be good.