k u wait for it to come out of its hole one it sticks his head out now u slap it down with the megaton hammer and ferocilosy hit it with the master sword (or biggeron)and then after three hits it goes back into the hole now it comes out of the hole flying and watch out because its fire causes of a total of three hearts so just target it and sidestep a lot now it repeats the process of the megaton hammer and slash it three times and it goes back in now heres the catch instead of flying around and bursting fire it (the same as goin to biggeron or great fairy on mountain) the evil metors come down and try to smash u after that it goes back to the megaton hammer phase then hit three times and the dragon does the spurt fire thing and u get the point its the same thing hope this helped

PS:this is a load lot easier with the biggeron sword

It's in the room where Darunia was. First go through the temple and rescue all the Gorons. The last one will be locked up with the Boss Key.