Special attacks:
Pause game play during a Nekketsu League match then press A(3), B, A(3), B, A(7). A message will appear where the score is displayed to confirm correct code entry. Resume game play, and all players can now use special attacks until the halftime and the match ends.

Techno Japan Cup game:
Enter F38 09A 16F7 as a password.

Pause game:
Note: This code requires a multi-tap adapter. Press Select on controller three to pause the game during or outside a match.