Generation Iii
Cloud Nine
Negates weather effects.
Detailed Effect
While this Pokémon is in battle, weather can still be in play, but will not have any of its effects. This ability functions identically to Air Lock.
Pokémon With Cloud Nine
7 canonical Pokémon forms can have this Ability.

Psyduck 
Golduck
Lickitung
Swablu
Altaria
Lickilicky
Drampa