Titan

Enter this password at the regular password entry screen to play a really weird bonus game.

On Player 1's controller, hold A, B, Down, Select, and Start, then also hold A and B on Player 2's controller. Reset the console and release all buttons to be able to begin a game on Level 80 with fifteen additional lives.

Hold Down, A, B, Select, and Start on Controller 1 and A and B on Controller 2 at the same time. Reset the console and release all buttons on Controller 1 only. (Keep the buttons on Controller 2 held.) On Controller 1, press A, A, A, B, B, B, A, A, A, and any other button. During gameplay, you can now press Down, A, B, Select, and Start all together to skip levels. You will also begin with 15 extra lives and initially start on level 80.

At the title screen, select "Original" mode, then select "Continue", where you will be brought to the password entry screen.

Press and hold Down, A, B, Select & Start and press Reset. If done right, the sound test will appear.