During the demo, while the logo/credits are displayed, press and hold A for about 20 seconds. While the credits scroll by, then press A, B, Start, Select, select, Start, B, and A to view the developer photos.
Final Race
Enter the following password: RVHC/Q9J4MBSJ.!VKXXK!/DXKFFFFBR7.
Skip Cutscene
The "Drivers, start your engines!" cutscene may be skipped by pressing the Up + A + B buttons at the same time.