A new battle mode level (In the Gutter, Sea Sick, Blizzard Battle, and Lost at Sea) will be available for each world that is completed in Adventure mode. Alternatively, highlight the "Battle" option on the main menu, then repeatedly tap Start. If you entered the code correctly, you will hear a sound.
Note: For the Japanese version of the game, use a Joy Card 64 controller. Set the controller's slow switch to the "Hu" position at the title screen and wait for the sound that confirms correct code entry. Then, four new levels will be accessible in battle mode.
Beat the Rainbow Palace world by defeating Sirius. Then, a new selection that allows the credits to be viewed will appear on the options menu.
|Full Power Option|
Collect all 120 gold cards (100 from the normal worlds, 20 from the Rainbow Palace). Then, a "Full Power" selection will appear on the options screen. This option allows any level to be started with maxed out Red bombs, and the remote item.
|Preview Custom Bomberman|
At the main custom Bomberman menu, press Z or R.
When Bomberman is dizzy, rotate the Analog-stick for a faster recovery.
|Rainbow Palace Bonus World|
Find all one hundred Gold Cards and defeat Altair.
Beat the first four levels of the game on the normal difficulty level of adventure mode.