KH 358/2 Days-Question.

So, I read somewhere that when you beat the Kingdom Hearts 358/2 days that you will be able to play the game with Xion. I DID beat the game (although I'll admit I didn't get 100%), and I saw no such option to play as Xion. (I don't want to play Mission Mode, if that's what they were talking about).I also looked up a walkthrough, and a section of unlockables on a (as far as I'm aware) reliable walkthrough, faq, and cheat website, and I didn't even find so much as a hint that Xion can be played in the game.Is this a myth? If you have beaten the game and played as Xion, how do I go about doing that?Thanks.

In Kingdom Hearts 358/2 it's possible to play as xion in misson mode but you can't play as her in any other mode.