Choro Q Marine Q Boat - Various codes


Select same boat:
Select "Free Run" mode, then press Up(2), Down, Up, X at the track selection 
screen. 

Extra mode:
Complete all the missions, finish in first place on all tracks, and collect all 
stone signs from the tracks. The "????" selection on the options screen will 
turn into "Extra mode". Use this option to access a "Death Fight" feature and 
the bonus Marinoid Bay track. 
 

Codes taken from Video Game Strategies (http://vgstrategies.miningco.com)