Complete the Sphere Grids for all main characters

Burst a little in a single battle.

Complete a Sphere Grid for one character

Buy every sphere at the Luca Theater

Deal 99999 damage with one attack

Learn to use all enemy abilities

Defeat Yu Yevon

Obtain all Celestial Weapons

Obtain all Aeons

Get 5 treasure chests during the Chocobo Race at Remiem Temple and win the race

Obtain Anima

Pass all chocobo training

Steal successfully with Rikku 200 times