The following characters can be unlocked by completing the designated task.

Unlockable	How to unlock
Brody	Collect 350,000 coins
Frank	Collect 40,000 coins
Fresh	Collect 50 Boomboxes
Frizzy	Collect 150,000 coins
King	Collect 80,000 coins
Lucy	Collect 7,000 coins
Ninja	Collect 20,000 coins
Prince K	Collect 980,000 coins
Spike	Collect 200 Guitars
Tagbot	Collect 12,000 coins
Tasha	Collect 30,000 coins
Tony	Collect 95,000 coins
Tricky	Collect 3 Caps
Yutani	Collect 500 Spaceships
Zoe	Collect 120,000 coins