Course close-up:
Press Up and Down to zoom in and out at the course selection screen.

Control title screen logo:
Press the cursor keys at the title screen to rotate the "R". Press (Change View) to change the color.

Skip credits:
Hold (Action) + (Accelerate) + (Change View) and press (Start).

View demo:
Press (Action) + (Accelerate) to view the demo, or bypass the Sega and "Traveler's Tales" screens.

Slow characters down:
Go to the options menu and select "Controls". Set them to whatever you are comfortable with, then when you get down to "Drift", set X for left and V for right. Then when you want to slow a character down, Amy works well, go to their side and drift into them. It will slow them down considerably. They will be left in the back to accelerate again while you are hurrying past him/her.

Reactive Factory: Shortcut:
Select any character. Turn right when you are catapulted near the gap in the road. You should skip about five seconds.

Radiant Emerald course:
Finish in first place on each normal course.

Play as Dr. Robotnik:
Finish in first place in the in the Radiant Emerald course. Alternately, successfully complete all levels.

Play as Puppet Tails:
Collect all five coins in Radical City and finish in first, second, or third place. Then, defeat Puppet Tails in a race.

Play as Super Sonic:
Collect all seven Chaos Emeralds from the first four courses. To collect a Chaos Emerald, you must collect it and finish in first place in that race. Then press [Down] while highlighting Sonic at the character selection screen.

Play as Mecha Knuckles:
Collect all five coins in Radioactive Factory, and finish in first, second, or third place. Then, defeat Mecha Knuckles in a race.

Play as Mecha Robotnik:
Collect all five coins in Regal Ruins and finish in first, second, or third place. Then, defeat Mecha Robitnik in a race.

Play as Mecha Sonic:
Collect all five coins on Resort Island and finish in first, second or third place. Then, defeat Mecha Sonic in a race.