Enable either the "Fight as Orochi Iori" or "Fight as Orochi Leona" codes. Highlight Leona, then hold Start and press Up, Left, Down, Right, Up, Down, B + C at the character selection.
Fight as classic Kyo Kusanagi
Highlight Kyo Kusanagi, hold Start, then press any button.
Fight as King Of Fighters '94 version of Kyo
Hold Start and press A + D at the character selection screen.
Fight as Orochi Iori
Highlight Iori, then hold Start and press Left, Right, Left, Right, Left, Right, A + C at the character selection screen. Orochi Iori will appear below and left of Iori.
Fight as Orochi Leona
Highlight Leona, then hold Start and press Up, Down, Up, Down, Up, Down, B + D at the character selection screen. Orochi Leona will appear below and right of Yabuki.
Secret Ending
Pick any of these three-person teams to unlock the secret ending.
Press A, B, or C after the last attack, before the pose sequence begins. If your character is the losing fighter, press A, B, or C on controller two at this time.
View team mate attitude
Hold C while choosing a character at the order selection screen. A face will appear to represent that character's attitude. A smiling face indicates "always aid" and will add one bar to the second character in advanced mode. A neutral face indicates "random aid". A frowning face indicates "never aid" and will remove all bars.