Oblivious

Oblivious makes the Pokémon immune to gender-based moves and abilities, specifically Attract, Captivate and Cute Charm.

Game descriptions

Ruby, Sapphire, FireRed, LeafGreen, Emerald:Prevents attraction.
Diamond, Pearl, Platinum:Prevents the Pokémon from becoming infatuated.
HeartGold, SoulSilver:Prevents it from becoming infatuated.
Black, White, Black 2, White 2:Prevents it from becoming infatuated.
X, Y, O.Ruby, A.Sapphire:Keeps the Pokémon from being infatuated or falling for taunts.
Sun, Moon, Ultra Sun, Ultra Moon:The Pokémon is oblivious, and that keeps it from being infatuated or falling for taunts.
Sword, Shield, B.Diamond, S.Pearl:The Pokémon is oblivious, and that keeps it from being infatuated or falling for taunts.
Scarlet, Violet:The Pokémon is oblivious, keeping it from being infatuated, falling for taunts, or being affected by Intimidate.