Nekketsu Kakutou Densetsu

Sound test:
Hold Select + Left and press A at the title screen.

Select same character:
Hold A + B on controller two and press Start on controller one at the title screen to allow both players to select the same character in battle mode.

End battle:
Hold Select + Right and press A at the title screen. Select story mode to advance to the end battle.

Fight as Toraji:
Press Right to highlight the choice not to use a custom fighter at the character selection screen in battle mode. Hold Select and press A. Continue to hold Select, press Right, then press A.

Fight as Toraichi:
Press Right to highlight the choice not to use a custom fighter at the character selection screen in battle mode. Hold Select and press A. Continue to hold Select, press Left, then press A.