Extra mode: Press Up, Down, Left, Right,
X, Circle at the title screen. A new "Extra"
option will appear that allows the game to be played with new
enemies and alternate enemy positions.
Hidden area 6: Select a character in versus mode. Then, highlight
the random option on the area selection screen, hold L1,
and press Circle.
Hidden area 7: Select a character in versus mode. Then, highlight
the random option on the area selection screen, hold L2,
and press Circle.
