you use it when you need to

It only works in Besaid Island. You walk around until the meter in the bottom left corner
is filled up. then you push the x button. It turns into a camera and you look around the
whole place looking for spheres with numbers on them. you go into the secret cave on
besaid island and type the numbers as you found them in order from the temple to the
secret cave. The is a dresssphere holder up on the cliff in a treasure chest when you open
it.

I love pie more than anyone and you are just jealous