Race as Cosworth
Finish in first place in all races in the easy tournament and then defeat Cosworth at Millennium Park.
Race as Tetsuo
Finish in first place in all races in the medium tournamentand then defeat Tetsuo at City One.
Race as Beamer
Finish in first place in all races in the hard tournament.
Shortcut on Medium City
Just as the come out of the cicane (about 3/4 of the way around the circuit) take a hard left into the garden, this somehow warps you to that road that you can see on the left at the start line (and wonder how the hell you get on it). By using this shortcut you'll whip Tetsuo ass.
Easy turbo
Hold the brakes and accelerate at the same time. The kart should just stay in the same location. When you release the brakes the turbo will automatically activate.
Full turbo bar
Hold the brakes and accelerate at the same time, do two 360s, then release brakes to get a full turbo bar.
Quick start
Hold Square until the green light disappears, then hold X.