Defiant in Pokémon Black & White

When its stats are lowered its Attack increases.

Raises Attack two stages upon having any stat lowered.

When an opposing Pokémon lowers one of this Pokémon's stat stages, its Attack rises by two stages. Self-inflicted and ally-inflicted stat reductions do not activate Defiant. If several different stats are lowered, it activates once for each stat lowered.