Generation Iii
Oblivious
Prevents attraction.
Detailed Effect
This Pokémon cannot be infatuated and is immune to Captivate. If a Pokémon is infatuated and acquires this ability, its infatuation is cleared.
Pokémon With Oblivious
26 canonical Pokémon forms can have this Ability.

Slowpoke 
Slowbro
Lickitung
Jynx
Slowking
Swinub 
Piloswine
Smoochum
Illumise
Wailmer
Wailord
Numel
Barboach
Whiscash
Feebas
Lickilicky
Mamoswine
Bounsweet
Steenee
Dondozo
Spheal
Sealeo
Walrein
Salandit
Salazzle
Salazzle Totem