The King of Fighters 2002/2003 Cheats
Successfully complete single attack mode. Alternately, play single attack 20 times.
Hold Start and choose Yashiro, Shermie, and Chris at the character selection screen.
Successfully complete the game in team mode to unlock the team attack mode option.
Successfully complete the game in single mode to unlock the single attack mode option.
Defeat a character in single attack mode to unlock his or her picture in the gallery.
Successfully complete mission 40 in time attack mode. Alternately, play time attack mode 150 times.
Successfully complete mission 20 in time attack mode. Then, hold Start when choosing Kyo at the character selection screen. Alternately, play team attack mode 50 times.
Defeat Rugal in team attack mode to unlock him as a selectable character. Alternately, play team attack mode 20 times.