During a 2 player arcade mode game press A, Left, Left, Right, Down, Z.

Go to options, then go to credit icon (click on it). Then press Left, C-down, right, down, Z...

During a 2 player arcade mode game press A, Left, Left, C-Down, A, Right, Z.

During a 2 player arcade mode game press:

Beachball Car   B, B, A, Left, Left, C-Down, A, Right
Cupra Car       C-Down, Up, B, Right, A, C-Down, A, Right
Helmet Car      Up, Up, Z, B, A, Left, Left

milk truck - beat the first year.
helmet car - beat the second year.
cupra car (ice cube on wheels) - beat the third year.
beach ball car - beat the fourth year.

At the Car Selection screen, hold L and R and press C-left, C-right, or C-up to change the colors of the car.

Get first in every race in the 6 season.

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