Change The Weather
After selecting your team, choose the "Practice" option. Now, hold Select and press Button 1 once or twice to get to the "Course" screen. On this screen, while still holding Select, press:
Effect Code Cloudy Weather Right Rainy Weather Down Sunny Weather Up
Demo Course Menu
At the title screen, hold Right + I and press Select.
Play With Big Cars
At the game mode screen, select Test Drive mode. Now go through all the screens until you reach the "Setting" screen. Highlight "Exit" and hold Left + Run + I. If done right, you'll drive bigger cars.
At the title screen, hold Down and press Run.
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