Here's how it'd work- you move the cursor round with the stylus, move Olimar with the D-Pad, the Call command is on L, and the menus are accessible with the touch screen on the right-hand side. And the Stand By command is on the X,Y, and R buttons. You can also change the scheme for lefties- with the on-screen icons for menus flipped to the other side too.
Good or bad idea? Feel free to provide your own ideas!
EDIT: Should it use the DS's internal clock, or just keep the time scale as is?