Generation V
Justified
Raises Attack when hit by a Dark-type move.
Detailed Effect
Whenever a Dark-type move hits this Pokémon, its Attack rises one stage. The move is not negated in any way.
Pokémon With Justified
10 canonical Pokémon forms can have this Ability.

Cobalion 
Terrakion
Virizion
Keldeo Ordinary 
Keldeo Resolute
Growlithe
Arcanine
Absol
Lucario
Gallade