Gossick World: 
Get all 24 Other-Dimension Bombs and a 5 on every stage (Bomber Star through Garaden Star).

Slider Race: 
To get the first ??? on the options screen, get all 5s on all the stages (Bomber Star through
Garaden Star). In the Slider Race, you race a snowman on your Bomber Slider with the best time
recorded.

Golden Bomber:
To get the second ??? on the options screen, get 5s on all the stages (Bomber Star through
Garaden Star) and beat Gossick. In this mode a gold card will turn Bomberman into Gold
Bomberman. The best score from three stages will be recorded.

Millian's Treasure Hunt:
To get the third ??? on the options screen, get 5s on every stage (Bomber Star through Garaden
Star). In this mode, a ship returning from Garaden Star filled with treasures blows up and scatters
24 treasures around all six stars. Your goal is to find all of them.

Level Select:
While at the title screen or or options screen press A + B + Z. 

Game Shark Codes

     Infinite Lives - 80165243 0009 
     Infinite Health - 80165244 0004 
     Extra Gems - D0165241 0000 or 80165241 004B 
     Full Bomb Power - 8016523F 0003 
     Press GS Button For All Odd Bombs - 88057495 00FF or 88057496 00FF or 88057497
     00FF