I really need help! You know the part where you get on the shoopuff, and you ride around and your talking about machina being bad, and the underwater city. Then the Al bhed kidnap Yuna, well I need advice on that battle. I always die!!!
Cast haste on Wakka and Tidus, and just hack away. If this doesn't work, than before the battle, equip weapons with Lightningstrike
If these tips don't help, than there is always www.gamefaqs.com