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"