That stuff yes, but what about the stages. Unless the devs have actually described in detail what they were and all the features there's no way we can recreate it. Plus do we know the movesets for the excluded characters? I've never seen any videos or statements on excluded characters and there movesets.
Impossible, well unless you have a time machine and leak the files when the game was being developed. The iso only contains the final product without anything else in it, so all the files we can get are already extracted and (that ones we've decoded) have been looked through. If you can find out everything that was excluded from the final release it would be possible to change it to an extend, but BrawlEx would still need to be used. That would be cool though, playing stuff that only the devs played.
That happened to me once, only it was when you selected the stage you wanted to edit the music on it froze. I fixed it by downloading a save from some website, but that means losing your data. But your modding the game so that doesn't matter right?
I have made a bunch of new tutorials on the clone engine, I only need to upload them now. But due to various circumstances/don't feel like uploading a bunch at once (will kill my wifi). Instead I'll upload them slowly over an unplanned timetable.
Wait, you don't need to make a new iso to play it in usbloadergx. Just set the game load options to "Ocarina On" and run the game. Just set up your sd card like you were using usb gecko instead of a usbloader.