JET SET RADIO UNLOCKABLES
Love Shockers gang
Finish all Shibuya-cho levels with a Jet rank.
Noise Tank gang
Finish all Benten-cho levels with a Jet rank.
Poison Jam gang
Finish all Kogane-cho levels with a Jet rank.
Goji Rokkaku
Finish all the Grind City levels with a Jet rank.
Garam
Finish all of Garam's challenges.
Gum
Finish all of Gum's challenges at the start of the game.
Mew
Finish all the Benten-Cho levels. Mew will then challenge you. Win all three of her challenges.
Pots (the Dog)
First, unlock all the bonus characters (Noise Tanks, Poison Jam, Love Shockers, and Goji). After completing the game, play the "Monster of Kogane" level before "Benten Boogie". After completing those levels, a Noise Tank will challenge you after Chapter 2. Defeat the Noise Tank Challenge and you can play as Pots.