Here are some cheats and tips for the game X-Band Modem.
Fish Pong mini-game:
Press Up(4), Right, B at the main menu.
Maze mini-game:
Press Up(2), Down at the “call-up”
screen. Press Down(2), Left(2), Right, C
at the main menu for a larger maze.
Change screen font:
Enter the following controller actions at the player selection
screen.
Earthquake font
Press Right, Left, Right(2), Up,
Right, Left.
Expanding font
Press Up, Down, Up(2), Down, Left,
Up.
Normal font
Press Left, Right, Left(2), Up, Left,
Right.
Sound test:
Press Up(3), Left, Right, Left,
Right, Up at the main menu.