Shin Nekketsu Kouha: Kunio Tachi no Banka

The passwords in Kunio Tachi no Banka consist of Four digits. The first and third digits is the game's stage. Here's the a list of all the passwords for each level. The second digit is used for the Bike Stages. In order to go to a Bike Stage, the first and third digit must be 0s, while the second digit must be one of the following numbers. The fourth and final digit is to determine the difficulty level. Even Numbers are for Normal Mode (0,2,4,6,8), while Odd Numbers (1,3,5,7,9) are for Easy Mode. This is quite meaningless if you try to go to any scene beyond the first conversation with Sabu, as the game will always be in Normal.