Oblivious

Oblivious is an ability that prevents the user from being infatuated or attack stat changing abilities such as Intimidate. This means that if a Pokémon with Oblivious is targeted by moves or items that would normally cause infatuation (like Attract and Destiny Knot) it will be immune to those effects.

The Slowpoke line is notable for having this ability along with a few others as well.