Enter these codes in the Title Screen.

Effect	Code
Play in black color	A, C, B, C, C on Controller Two.
Play in pink color	Left, Left, B, Left, Right on Controller Two.
Remove Enemy Tracking Radar from screen	C, C, C, Up, B on Controller Two.
Remove Radar from screen	Up, Down, A, A, B on Controller Two.
Show Eliminated Enemies	C, B, A, Z, Y on Controller Two.