Defiant

 is an Ability that raises the user's Attack when one of its stats are lowered.

Effect
If any of the user's stats are lowered, its Attack stat raises sharply. This Ability won't activate if the user lowers their own stats, or if their stats are lowered by an ally.

Pokémon with

 * Mankey
 * Primeape
 * Farfetch'd
 * Piplup
 * Prinplup
 * Empoleon
 * Purugly
 * Pawniard
 * Bisharp
 * Braviary
 * Tornadus (Incarnate)
 * Thundurus (Incarnate)
 * Passimian