18 Wheeler Information
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.
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. Alternately, successfully complete arcade mode with all four characters.
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).
Game Shark Codes:
(M) Must Be On EC8935C81440C69C
Press R1 For Max Cash 0CCA0E261456B80C 1CA7B8C414BE598C 0CCA0E261456B80C 1CCD709414BE598C
Press L1 For More Time D05F8D020000FBFF 103037A40000EA30
Press R2+L3 For K.I.T.A. Turbo 0CCA0E261456B20A 4CE4C6AE14562555