Question: how to find azure flute in pokemon fire red?
Answer: Just go climb Mt. Coronet (by Oreburgh or Hearthome, not Eterna or Celestic, the same place where you went to catch Dialga). ... 
The problem is to OBTAIN the flute which you can only get through cheating now. once you have gotten it: ... 
Spear pillar. ... 
In spear pillar, near the entrance is a square with a flute in it.