Unlock more parking levels:
Finish the four parking levels to unlock a fifth parking level. If you finsih that as well, you will unlock a sixth parking level as well.
Unlock the Nippon Maru:
At the title screen, hold X and press Start. Dont release X until the mode selection screen appears
-or-
Beat the game with all four characters to unlock the Nippon Maru.
Bonus Trailers:
Successfully complete arcade mode with all four characters to unlock two bonus trailers in score attack mode, and arcade mode (if nippon is selected).
(supplied by: Alll_rounder)
