The guides out today are no where near as extensive as FAQs online. Check out the Arena section of the FFX guide, it's not helpful at all. Only lists the items that you can win/steal/bribe. And they're the toughest bosses in the game, but the strat guide doesn't give you an start for them.

I agree that the weapons arn't part of the game as to that you have to get them. A lot of people actually have trouble with last boss when they do no sidequest. But everyone has to fight the battle at the top of Gagazat(sp) on their own though. ;)

Really, you don't need to get the weapons unless you decide to do the arena. Same with armors.

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