Unlockables

Play as Hanamizu
To play as Hanamizu, simply complete all of the tracks there while gaining silver medals.
Unlock Alternate Costumes
You have to finish in first place in all course and course variations two times to unlock every costume.

Easter Eggs

Hidden Artwork
Insert the GD disc into a PC CD-ROM drive, where you'll fine two images to use as wallpaper on your PC.

When a new record has been achieved, the secret introduction will play instead of the normal one.