A is to use registered items (Y on DS). S is to open up the menu (X on DS). X is to select a command and to talk to someone and get items (A on DS). Z is to cancel a command and to run (B on DS). UPDATE 8/30/16: Brightness has changed, which is why the battle intro isn't fading into the battle backdrop. I posted on the bugs and glitches forums, but if it works as intended I'll have to use a giant black/white screen and the ghost block to get the same effect. Nevermind I just made Tyrone look less drunk to fix the brightness bug.
This copy fixs some of the major bugs in the game.