How can you activate blazikens blaze ability?

Question

And also tell me what it does.

Answer 1

Blaze power ups your fire type moves. it is activated when your health is low.it's not bad if you are in the danger of being killed.

Answer 2

Blaziken's Blaze ability is used once you reach anywhere below 1/3 of your HP is gone. Use Fire moves as they will become more effective and deal more damage.  

Answer 3

when it has low hp thats its nature

Answer 4

I boost the attack of fire moves after 1/3 of your health is gone.