1) Get the Hookshot from Dampes Grave in the Grave Yard at Kark Village
2) Hookshot to the tree were you see Saria where she gives you her song when you were a kid.
Death Mountain
It's on the map.
beat the boss
the forest temple
get the boomerang.
The big key
You finish off the forest temple mini boss
After you complete the Forest Temple the twilight is no longer in that region and Link must travel to the next region of Hyrule to rid it of the twilight
as soon as you defeat the Minny Boss in the Forest Temple you get the boomerang
In Twilight Princess, the only monkey whose name is given is the forest temple boss monkey - his name is Ook.
collect all the monkeys then defeat the flower boss
In the sea temple.