This hack is for Left-handed who uses stylus with left hand and annoyed that had to use the same hand for D-PAD just to scroll the screen.
The hack makes the D-PAD and X,Y,A,B button swap its Button Mapping. It will now use the XYAB button to scroll the screen while the D-PAD for function that the ABXY button had before.
For use with ROM
Action Replay Code