When you're on the play selection screen, you can hide the cursor so others can't see the play you choose. To do this, highlight the upper-left play (where the cursor is before you move it), then move Up on the joystick twice to hide the cursor.
At the VS. Screen enter the following code... Note the first number represents how many times you hit Turbo, the second Jump, and the third Pass.
Enter the following as your name and pin number: