Speed Devils Cheats...
All Cars and Tracks
During gameplay, press B, Right, B, Right, Up, B, Up.
Extra Money
During gameplay, press A, Right, A, Right, Up, B, A.
Full pause screen
Pause the game and press X + Y.
Infinite money
While playing a game, press B, A, B(2), A, Down, Right, Left.
Infinite Nitros
During gameplay, press Down, Up, Down, Up, A, X, A.
Play as Driver X
At the Main screen, press A, X, Right, Left, X, A.
Skip Current Class
During gameplay, press Down, Right, Down, Right, A, X, A.
All Cars and Tracks...