Extra Mode Complete all the missions, finish in first place on all tracks, and collect all stone signs from the tracks. Then, 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.
Select Same Boat At the track selection screen, select "Free Run" mode, then press Up(2), Down, Up, X.
No Gameshark Choro Q Marine Q Boat Hacks found.
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Choro Q Marine Q Boat Strategy Guide
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