Bubble Bobble

Level select:
Enter 3V35NLLE as a password.

Enter 9ENVI555 as a password to unlock all levels plus all of player one's special items and most of player two's special items.
Information in this section was contributed by gene6359.

Cheat mode:
Highlight the "Password" option on the title screen and press Pause. Press 1, Left, Down, Up, 1, Up, 1, Up. Extra lives and all power-ups will be available during game play.

Bonus room:
Begin game play and blow bubbles around the three opponents on level one. Do not pop the bubbles. Blow bubbles around the opponents after they turn red. Avoid Baron von Blubba, and keep putting the opponents in bubbles until a door appears. Enter this door to reach a bonus room.