Bubble Bobble Old and New Cheats - GBA

Bubble Bobble New: Super mode
Choose a saved game file, then go to the Bubble Bobble New title screen. Press [Right], [R], [Left], [L], [Select], [R], [Select], [L]. Super mode has new backgrounds, enemy formations, and an alternate ending. Repeat the code to return to normal mode.

Bubble Bobble Old: Original mode
Choose a saved game file, then go to the Bubble Bobble Old title screen. Press [L], [R], [L], [R], [L], [R], [Right], [Select]. You can now access the secret rooms, even after you lose a life.

Bubble Bobble Old: Power-up mode
Choose a saved game file, then go to the Bubble Bobble Old title screen. Press [Select], [R], [L], [Left], [Right], [R], [Select], [Right]. The game will start with Shoes and all Candy power-ups.

Bubble Bobble Old: Super mode
Choose a saved game file, then go to the Bubble Bobble Old title screen. Press [Left], [R], [Left], [Select], [Left], [L], [Left], [Select]. Super mode has new backgrounds, enemy formations, and an alternate ending. Repeat the code to return to normal mode.

Bonus items
Enter one of the following initials at the high score screen, then start a new game to unlock the following items and effects.

Beer mug (pizza instead of bubbles)
Enter "KTT" as initials.

Flamingo (pink worms instead of bubbles)
Enter "STR" as initials.

Fork (enemies turn into fruit)
Enter "SEX" as initials.

Knife (enemies turn into various items)
Enter "..." as initials.

Octopus (wooden stakes instead of bubbles)
Enter "TAK" as initials.

Soda can (enemies turn into various items)
Enter "I.F", "KIM", "MTJ", "NSO", or "YSH" as initials.

CPU controlled Bobblen
Defeat the last Boss in level 100. Start a new game, press [Start] and select the "Bobblen" option. Note: This can be repeated after Bobblen runs out of lives.