King Of Fighters 2002/2003 Cheats

Character art galleries (KoF 2003)
Play through S-Survival and with each character that you defeat, their character art will be available in the gallery.

Team ending movies (KoF 2003)
Play through T-Survival. With each team that you defeat, their team ending movie will be availble in the gallery. Defeating Kyo, Chizuru, Adelheid, and Mukai will unlock generic movies available to any team that you would see before and after fighting them.

Play as Mukai
Hold the Right trigger while selecting Kyo at the character selection screen

Play as Adelheid
Hold the Right trigger while selecting Iori at the character selection screen

Special Orochi ending (KoF 2003)
Play though team battle and select Iori, Chizuru, and Kyo as your team. Defeat Kusanagi with a desperation move and fight Mukai as the end boss. After defeating Mukai you will get a special ending movie involving the Orochi Seal.