Bubble Bobble Codes -

Entering debug mode:
Press Down, Up, Down, Up, Right, Down, Left, Down, Up, Down at the title screen.

Level skip:
Enter debug mode. Press L1 during game play to jump to the previous level. Press R1 during game play to jump to the next level.

Debug menu:
Enter debug mode. Press R2 during game play to display the debug menu. This displays the map number, Bub's lives, and Bob's lives. Press R1 during game play to hide the debug menu.

Original version:
Press Right, Left, Up, Down, Up, Down, Up at the title screen. The original version of the game allows you to enter the diamond rooms at levels 20, 30 and 40 even if you lose a life.

Alternate bonus effects:
Enter one of the following initials on the high score screen, then start another game. New effects will appear when certain bonuses are collected during the game.

SEX
TAK
STR
KTT
I.F
MTJ
NSO
KIM
YSH
LSD

Hint: Lightning potion in every level:
Enable the "Debug menu" code. Start game play and display the debug screen. Go to the level 100 map (the screen will display 63). As soon as you reach that level, return to level 1 (the screen will display 0). You will now have a lightning potion throughout the game.