Sound Test- After beating the game in adventure mode on the normal difficulty level, you can access the sound test.
Special Suil- Upon exploring the game in adventure mode you will find inivdual peices of a special suit for bomberman. These peices can be customized for your suit when you play in the battle mode.
Secret Battle Mode-At the "game select" screen hit start fast untill you hear a chiming noise. You should have 4 new battle stages.
New World- To go to the new world get all 100 gold cards and defeat Altair again.