I was wondering how many files i can make. I think it's two, but I wanted to know if it's like one for Sora and one for Riku, or if you can play as both Sora AND Riku on the same file. Can someone help me? I'm just wondering cuz my brother wanted to make a file, and he's been playing KH longer than I have. So how many files can I make?

There's 2 files,the save is for sora AND Riku so you and your brother are able to play the game and have your own save file

Thanks, I was kinda worried for a sec. I was wondering how I was going to break it to him... But now I don't have to!! Thanks again

You could also save it all on one file (so yes, you can play as Sora and Riku on the same file.) But in your case, you might want to save it on two with your brother and all; you can play your own game without him messing it up or interacting.