At the Character Select screen, highlight Iori then hold START and press Left, Right, Left, Right, Left, Right, Left, Right, Left, Right, X + A.

At the Character Select screen, highlight Leona then hold START and press Up, Down, Up, Down, Up, Down, Up, Down, Up, Down, Y + B.

Enter the Orochi Leona code, then return to the character section screen, hold START and press Up, Left, Down, Right, Up, Down, X + B.

During practice mode, enter the five secret characters. After entering the codes, hold R, L, B, Y, Z for about three second, the cursor will highlight beside Iori and Shingo.

When in the Character Selection screen, highlight Kyo Kusanagi. Hold Start and press any button.

If you put your The King of Fighters 97 cd in to a cd player, you can listen to all the music from the game as if it were a sound track.