Bonus parking levels:
Successfully complete each of the four parking levels to unlock
an additional parking level. Successfully complete the bonus
parking level to unlock a sixth parking level.
Nippon Maru:
Hold X and press Start at the title screen. Keep X held until the
mode selection screen appears. Choose any mode to drive the
Nippon Maru truck.
Lizard Tail:
Successfully complete the game with all five trucks (Asphalt
Cowboy, Stream Line, Long Horn, Highway Cat, and Nippon Maru).
Bonus trailers:
Successfully complete arcade mode with all four characters to
unlock two bonus trailers in score attack mode, versus mode,
and arcade mode (if the Nippon Maru is selected).
Sites: