Blinkers In a garage, press and hold L1 and press R1.
Car A03–Top Down At the Car Select screen in 1P Mode at Garage A, press and hold Circle while pressing X
Car B04–New Colors At Garage B in the Car Select screen, press and hold Circle while pressing X.
Car C06–Sun Roof At Garage C in the Car Select screen, press and hold Circle while pressing X.
Hidden Cars At the Car Select screen, put the cursor on Garage A, and press and hold L1 and press Circle.  Then, put the cursor on Garage B and repeat. Then, with the cursor at Garage C, Press and hold L1+R1 and press Circle.
Soccer Balls At the course editor, press and hold X, and press Triangle.  Put the white cone on the course and continue doing so.  After beginning, the cones will be soccer balls.

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