When you have control of the a - Final Fantasy X
When you have control of the airship you will be able to enter the chambers of the fayth in certain temples. Treasure chests and items can be found within.
In Besaid you can find: Evasion sphere, potions, elixer, wht mag sphere, hi-potion.
In Kilika you can find: luck sphere, defense sphere, agility sphere, accuracy sphere.
In Djose you can find: luck sphere, agility sphere, mag defense sphere.
In Macalania you can find: magic sphere, mag defense sphere, accuracy sphere.
In Remiem you can find a defense sphere.
In the cavern of the stolen fayth you can find a strenght sphere.