Boogie: She can be found at Kibogaoka Hill. Note: Boogie was known as Piranha in Jet Grind Radio and Sugar in Jet Set Radio.
Clutch: Find Clutch through DJ Professor K's instructions.
Combo: Successfully complete his challenges.
Garam: Successfully complete his challenges.
Rhyth: Go to the top of the Poison Jam warehouse in Rokkaku-dai Heights to find her the first time. Follow and find her two more times in the game. Note: Rhyth was known as Mew in Jet Grind Radio and Bis in Jet Set Radio.
Garam - Finish all Garam's challenges
Beat - Defeat him on Street Race
Combo - Finish Combo's Challenges
Rhyth - Find her at the top of the Poison Jam warehouse in Rokkaku-dai Heights. Then find her twice more in the game
Soda - Go to Highway Zero and find the guy dancing - He is the 'blue dot' on the map. Talk to him for a race an win.
Jazz - After 'death ball', go back to the stadium and challange jazz to a race.