Regardless of their type, Pokemon can learn a variety of moves and attacks, so, Psychic is not immune to any Pokemon.
If you are referring to what "type" has no effect against Psychic, the answer is none. Psychic isn't immune to any type. It is resistant to Fighting and Psychic attacks though.
There is one thing, however, back in Pokemon Blue, Red and Yellow, Psychic used to be immune to Ghosts, but that was years ago and strangely, after those 3 games, Psychic became weak to Ghost.
Dark-type Pokemon are unaffected by Psychic moves used against them.
Psychic is strong against Poison and Fighting, weak against Psychic and Steel, and has no effect on Dark. Bug, Dark, and Ghost are strong against Psychic. Psychic and Fighting are weak against it. There are no types that have zero effect on it.
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.
ABXY
Flying and Psychic.
Ground and Psychic
Flying and Psychic types are good against Fighting types.
psychic type pokemon are weak against psychic steel and dark
Psychic is strong against Poison and Fighting, weak against Psychic and Steel, and has no effect on Dark. Bug, Dark, and Ghost are strong against Psychic. Psychic and Fighting are weak against it. There are no types that have zero effect on it.
It differs among card but generally speaking, psychic is weak against psychic themselves.
Psychic and Ghost
The pokemon that are strong against psychic are bug, dark, and ghost.
Psychic-Type moves are weak against Steel-Types and other Psychic-Types. Psychic-Type Pokémon are weak against Ghost-Types, Bug-Types, and Dark-Types.
No Just to the following types: Gound Fighting and Fire and is immune to Poison Psychic is strong against the following types: Just Fighting and Poison And it will not affect Dark types at all
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.
Fighting types are weak against psychic and flying types.
i only know a few but ghost, dark, flying, pokemon are good against psychic but phychic pokemon are good against fighting, bug, and doesnt affect dark pokemon
Ghost & Flying. I believe that's it! Not dark or bug because although they're super-effective against Psychic, they are not-effective against Fighting. And not Psychic, because though it's super-effective against Fighting, it's not-effective against Psychic.