I can't get back into besaid so that I can get the treasure from the temple because I can't beat Dark Valefor could someone help me out a little please help this thing is really starting to annoy the heck out of me

Most important thing to remember is that the Dark Aeons are ultra hard and therefore the recommended stats stated below are quite high >_> mostly of some tactics can only be done with max stats in mind, if the tactic are not working, most likely your equipment of stats are just not up to it, so further training/customising is required.

1.You must at least maxed out your accuracy, defense, and attack
2.Customize your armor with Auto-haste, Break HP limit, Auto phoenix, and the last thing is Ribbon (This is the most hardest part, you need 99 dark matter! )
3.ALWAYS use Quick attack!!normal attacks are too slow and not recommended at all,ok ?

....I suggest you to use Yuna, Tidus, and Wakka.

Yuna: help other character with Protect first,and shell

Tidus & Wakka : Always use Quick attack (change your mode to warrior ) and use their limit (Wakka would be very use full if you can use his attack reels correctly )

I think that's all.
maybe other shriner has another tactics, so be patient. ^_^

Ummm... may I ask, but I don't understand the whole Dark Aeon thing. I have complete the entire game , but never came to a Dark Vaelfor at Besaid, can someone explain this to me?�

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Dark Aeons ONLY available in FFX international.

[ Spoiler !! warning! ^___^ ]

The dark Aeons are ultra hard versions of your normal Aeons which become available to fight during the last part of the game. I am not sure of the exact timing but i started fighting the dark aeons only after reaching the last save point just before the final boss inside Sin.

Do you know understand now?
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I thought that Dark Aeons where only in the european version of FFX, because the Europe version isn't International, well at least that what it says at square-europe.com . :D :D :D :D

ok, valefor is not hard, all u need to beat valefor is to have Yunas and Aurons ultimate weapons, have auron have break Hp limit and make sure he can do around 50,000 damage per hit then valefor should be easy as long as u keep aurons health above 9,999 auto pheonix and auto life can come in handy but really u only need stats in the 70 's for this battle however ifrit is slightly harder and i recomend having around the 100's for him and shivafor ixion u wanna be in the 150's and then ur looking at 200's for the rest and u need 255 for all and still have to use aim before u can even think of hittin pennance

You need to have 255 Strength with Wakka and the Attack Reels. Get a perfect reel, all '2 Hits' going across the center, and then you should kill him.

And it's as easy as that.