Generation Iv
Quick Feet
Boosts Speed if there is a status problem.
Detailed Effect
Whenever this Pokémon has a major status ailment, it has 1.5× its Speed. This Pokémon is not affected by the usual Speed cut from paralysis. Overworld: If the lead Pokémon has this ability, the wild encounter rate is halved.
Pokémon With Quick Feet
11 canonical Pokémon forms can have this Ability.

Granbull
Teddiursa
Ursaring
Poochyena
Mightyena
Jolteon 
Zigzagoon
Linoone
Shroomish
Galarian Zigzagoon
Galarian Linoone