To obtain Gold Ribbons, you must have a score of 5 in every level of a Planet. If you have achieved a complete set of 5's in a Planet, you will be awarded with a Gold Ribbon.
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.
Gossick World
Get all 24 Other-Dimension Bombs and a 5 on every stage (Bomber Star through Garaden Star).
Millian's Treasure Hunt
To get the third ??? on the options screen, get 5s on every stage (Bomber Star through Gossick). 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.
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.