Successfully complete Arcade mode three times to unlock all stages in Versus mode.
Play as Panda
At the character selection screen, highlight Kuma then press Circle.
Play as Jinpachi Mishima
Successfully complete Arcade mode to unlock Jinpachi Mishima. At the character selection screen, highlight Jinpachi and press Square for his fiery demon form, Triangle for his human form, or Circle or X for his demon form.
Play as Yoshimitsu's alternate forms
At the character selection screen, highlight Yoshimitsu and press X or Circle for his normal form, Square for his dark ninja form, or Triangle for his purple skinned ninja form.