Take Down Every Boss!!!
When in chapter 5, go to bevelle and into a cave called Via Infinito, which you can get into by a portal in a room in the temple. On floor 40 after the bossbattle, you get an accessory called Cat Nip, which have an effect that when HP is yellow, all hits and all healings do 9999! If you combine this with the gunner jobs trigger happy, you can kill almost every boss in a few rounds!
More tricks, tips and cheats for this game are right here - Final Fantasy X-2 cheats
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