Pause the game, then hold L and press A(3), X, Y, Up, Down, Left, Up, X, Y, A, Y, B, A, Y, B. If you entered the code correctly, the pause screen will shake. Then, select the "End Run" option from the pause menu. All cheats, levels, FMV seqences, McSqueeb, Officer Dick, and Spider-Man will be unlocked.