First you need to go to the calm lands and get a chocobo. Next you go to where you first entered the calm lands after beating Seymour on mount gagazet. Next to the enterance is a small cliff with a chocobo feather. Walk up to it on your chocobo and press the X button to fly across to remien temple where then you go onto one of the sides and race a chocobo to the centre of the maze and you will then get a cloudy mirror.
Next you go to where you escape from Seymour natus from bevielle in the maclania woods and head one way until you see a grou of people. Talk to one and he will then say something about his family and then walk off. You now go through a path to where a man was blocking it and you can go through. There will be a big shiny thing that you click on. You will then get the celestial mirror. This is what is needed to open the chests to all your characters secret weapons. You also must get sigils and crests to power up their secret weapons. Eg. Tidus' secret weapon is the calabdog. To power up this weapon you need to go and find the sun crest and sun sigil and then go to where you powered up the celestial mirror.
