At the title screen, press Down, Up, Down, Up, Right, Down, Left, Down, Up, Down.
Enter debug mode. Then while playing a game, press L1 to skip to the previous level or press R1 to skip to the next level.
Enter debug mode. Then while playing a game, press R2 to display the debug menu, and press R1 to hide the debug menu. This displays the map number, Bub's lives, and Bob's lives.
At the title screen, press Right, Left, Up, Down, Up, Down, Up. Now 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.
Enter one of the following initials on the high score screen, then start another game. The new effects will appear when certain bonuses are collected during the game:
Infinite Lives P1 | 80176AC8 0005 80176ACC 0100 30176AE0 0000 |
Infinite Lives P2 | 80176A98 0003 80176A9C 0100 30176AB0 0000 |
Infinite Credits | 80176B30 0009 |
P1 Special of The Bobble | 80176ACE 0129 |
P1 Special of The Bobble in Fire | 80176ACE 011F |
P2 Special of The Bobble | 80176A9E 0129 |
P2 Special of The Bobble in Fire | 80176A9E 011F |
Rainbow Islands | |
Infinite Lives P1 | 8005DC3A 0003 |
Infinite Credits | 8005D3E6 0009 |