To get the Mercury Sigil to power up Rikku's Celestial Weapon in Final Fantasy X, you'll need to commit this sidequest in Bikanel Desert.

Finding the celestial weapons in Final Fantasy X is only half the battle--you'll also need to find the matching sigils on your travels.

Anima is one of the strongest Aeons Yuna can add to her arsenal in Final Fantasy X, but recruiting him takes a little extra work.

In Final Fantasy X, Yojimbo is an optional Aeon that can give Yuna a little extra firepower in the final battle against Sin.

In Final Fantasy X, collecting the Jecht Spheres will reward you with some powerful cutscenes and new Overdrives for Auron.

In Final Fantasy X, finding every Al Bhed Primer will reward you with some rare items, an achievement, and the gift of fluency.

Final Fantasy X's emotional tale is not complete without its unforgettable cast. Here's every notable character's basic information