Psychic does ×1 to Fairy

Generations VI to IX, single types. The other way round, Fairy against Psychic, is ×1.

102 Psychic and 64 Fairy species among the 1025 this site covers.

Attacker, Psychic Mewtwo sprite

Mewtwo #0150

damage×1Generations VI to IX

Defender, Fairy Florges sprite

Florges #0671

Fairy did not exist in Generation I and Generations II to V, so Psychic against Fairy has no value there.

Strongest Psychic attackers

Mewtwo leads Psychic at Sp. Atk 154

Sturdiest Fairy defenders

Dual types that change the answer