Flash Fire is an ability introduced in Generation III. So far, 5 Pokémon have this ability.
When a Pokémon with Flash Fire is hit by a Fire-type move, it does not deal damage but instead raises the power of the bearer's Fire-type moves by 50%. Subsequent hits do not raise the power even more, but the effect remains while the bearer is in battle.
Outside of battle
Flash Fire has no effect outside of battle.
Pokémon with Flash Fire