Unlockable and how to unlock them:
AAA Getter (10) - Get a "AAA" grade.
AAA Master (30) - Get a "AAA" grade in all songs.
Artist (10) - Don't leave out special effects.
Combo Zoner (10) - Successfully complete a Combo Zone.
Free Spirit (10) - Dance to your heart's desire.
Full Combo Guru (10) - Nail a full Combo.
High Kicker (10) - Kick high without striking anybody.
Rhythm Master (20) - Keep dancing to the rhythm.
Top Artist (30) - Don't leave out any special effects.
Trick Hero (20) - Get a "AAA" grade using all tricks.
Trick Master (20) - Clear all of the trick challenges.
Trick Mixer (20) - Nail multiple tricks at the same time.