Generation Ix
Thermal Exchange
Boosts the Attack stat when the Pokémon is hit by a Fire-type move. The Pokémon also cannot be burned.
Detailed Effect
Boosts the Attack stat when the Pokémon is hit by a Fire-type move. The Pokémon also cannot be burned.
Pokémon With Thermal Exchange
3 canonical Pokémon forms can have this Ability.
Frigibax 
Arctibax 
Baxcalibur