Six Bombs, Six Flames, and the Detonator
Enter 1111 as a password.

Sudden Death Stage
Enter 5656 as a password. The play field will be very small.

Alternate Colors
Press Select at the player selection screen.

Jump Over Walls
Use a multi-tap peripheral and use controller five to being a battle mode match. Press Y to jump over the walls.

Passwords

Level Password  
2     4361  
3     6442  
4     3903  
5     9564  
6     7735