plz. can anyone help me beat evrae on the air ship? it is very hard to beat him so can anyone tell me how to beat Evrae so i can go on and see what is next thanx?

u must have armors that has poison ward or better if u have poisonproof-also stone ward/stoneproof
then start the battle with wakka tidus and rikku; ask Cid to pull back;
cast haste on everyone; have wakka and lulu do the attacking and tidus use cheer
when evrae is down to 10 000 HP, it'll cast haste to itself and it'll go near u at the same time damaging ur characters, ask Cid to pull back again if it'll cast poison breath
then keep attacking until it dies...

I prefer to pull in after he's low on hp and has cast haste, because you can use Tidus' Delay Attack. Then just use Rikku's Al Bhed potion ANY time someone is yellow or stoned. (You may want to keep her out so that you can switch her in at any time.)

a better strategy if u have low stats
make sure u have LOTS OF AL BHED POTIONS, not only it cures petrification and poison, it gives u 1000 HP as well

everything they said works gr8 but another thing u could do if ur desperate and its down to the very end of the battle is have kimahri use the lancet ability on all of the bombs on the airship and then he should learn self-destruct (if he doesnt know it already). when evrae has less than 6,000 hp then have kimahri use self-destruct to pretty much end the battle (you might have to add in another shot or 2 by lulu or wakka). its kinda risky but it worked for me...i had trouble on this same boss exactly one year ago from today. i came on bella and registered and got all the help i needed <img src="/images/graemlins/laugh.gif" alt="" /> yup, its my one-year-bella anniversary tonight <img src="/images/graemlins/laugh.gif" alt="" />

this boss is the reason why i joined this forums
no matter what strategy i used, this boss is really annoying
now..well...still here to participate in discussions <img src="/images/graemlins/laugh.gif" alt="" />

it seems like this boss got a few ppl to join on this forum

Onward towards a strategy. I know you've all pretty much posted what I'm about to, but you've left out some key tricks:

First, buy Softs and Antidotes from Rin and customize Stone and Poison Ward onto your armors. These will also help you in later battles. Now, when the battle starts, do as the other people said and cast Slow on Evrae, and when it's Tidus' turn again, cast Haste (or Hastaga if you have it) on your characters. Have Rikku use a Smoke Grenade on Evrae. (Note that any status inflicted by a "Use" item (such as the aforementioned Smoke Grenade will always inflict its status. Just a little side information.) Now, have Auron use Power Break on Evrae. After this, scan him to make sure that Power Break and all other status ailments mentioned have been induced onto him. If not, simply repeat. After all of this, Evrae is what one might call a weakling. Of course, use Al Bhed Potions when needed (and have some extra Softs incase Rikku gets Petrified). You can pretty much take care of him now as you wish. When he gets down to 12,000 HP, he'll use Haste. Whatever you do, DO NOT COUNTER THIS. If you do, Evrae will recast Haste, and get another turn to attack. When Evrae gets down to about 9,000 or so hit points, if Rikku's Overdrive is filled, have her mix a (I believe) Grenade, and any Stat Sphere (such as a Strength Sphere, HP Sphere, MP Sphere, etc.), as that should cause 9,999, giving you a nice, juicy Overkill. Make sure everyone at least defends once in order to obtain AP.