In Battle Use
Animals with the Blaze ability have it activated whenever the animal has less than 1/3 of their health remaining. At this point of time, all Fire type moves of this animal has its power boosted by 150%.
This ability may tie in to the brute strength that animals would portray in battle where they would try their hardest to become the winner of a specific battle against their opponents. Fire type animals may use their internal body heat to become additional energy to power up their Fire type moves.