How do I deafeat Sin?

I don't know about anyone else but I used my strongest summon and that's it. My shiva was so powerful she could attack 4 or 5 times in a row doin 9999 each. Ny charcters were a really really low level. My strongest at that point was Auron who did about 6000 but he was really slow. After that I trained up and walked over the rest of the bosses

You need to get him fast and relly fast you arnt aloud to reach his mouth becuse
He gets closer before you fight him charge up your aeons overdives then fight him then and summon the and kick his big blueish blackish.

Try and get yojimbo and use his overdrive zanmato, one hit kill, if not him then try and hit him with all the aeons overdrives, bahamut can deal about 15,000 with his

Make yuna until she get holy and someone get hastga. Make bahamut overdrive and yuna overdrive too. When you fight use hastga to everyone and let yuna use holy until about 3 turn before sin use the attack thing. Let yuna use overdrive summon bahamut and let bahamut use overdrive 2 time. You should beat sin.

I was lucky enough to find a weapon with break damage limit for lulu so she could do about 60,000 in one hit. Use bahumut as hid overdrive can do loads without celestial weapons.

Zhen Ji Fan

XxX

You need to really train your aeons because then my bahumet did 53000damage with impulse use it three times and it's over the second time I played the game I used yojimbo. I payed him 1 gill and did 99999damage.