Fight inside the ship untill all of them have their overdrives have Lulu, Rikku and other character that knows black spells or holy. have Rikku tu ask the guy to move the ship (they will fire missles for 3 turn) then trade rikku for tidus and use hastega, the other character use spells. use Lulus best black spell and use her overdrive. Lulu has a special that i forgat but raises magic defence and magic if she knows if use a lot then keep using Lulus spells and the other characters. have tidus to use slow on evrae. after some time evrae will use haste on itselfe when it does trade Lulu for aaron tidus for Rikku and the other character for Khimari. use Aarons Overdrive. use Rikkus and use two (damage all the enemies i forgot what its called..... ~_~) and she will do Flood something then use khimaris overdrive the he learns from the fire things in the ship by using lancet...... make sure Lulus magic is really good....
bad news u will have to fight the dragon thing again but u will have how to save before and it will be way after.

P.S.make sure that u buy in the ship a lot of mega potions, ethers, potion the most as u can because after the guy on the ship will drop u somewhere to save yuna and u will have to battle Lord Seymors guards a lot of them those with weapons and they are kind of good u won't be able to save so if u die in there u will have to defeat evrae again.... i had to defeat evrae three freak times. really a lot of mega potions like 50...., 70.... Yuan will kill herselfe after that.............. just kidding she will have a new aeon Bahamut..... u won't battle Syemor only his guards....


GOOD LUCK!!!!!!!!!!!!!!!!!!!!!!!!!!

ues tidus, rikku, and lulu. tidus needs to no hastega and slow. stok up on rikku items. have strong magic. at start, use hastega , have rikku steal, and lulu attack with magic. on tidus next turn use slow on eevre. riku moves ship.lulu continues magic. wen evree gets faster, use slow on it. stay back until overdrives are full, then move in and attack. move back and continue. itll take a wile but it works

Just Hit him Like Mad