Hidden characters
A.ku.mu.: Achieve a "Jet" ranking in Fortified Residential Zone.

Beat: Defeat him in a street race.

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.

Cube: Go to the Bottom Point of Sewage Facility and outrace Cube in the City Rush. This must be done after beating the Noise Tanks in Sky-Dinosaurian Square.

Doom Riders: Achieve a "Jet" ranking in Dogenzaka Hill.

Goji Rokkaku: Achieve a "Jet" ranking in Rokkaku-Dai Heights.

Garam: Successfully complete his challenges.

Immortals: Achieve a "Jet" ranking in Skyscraper District and Pharaoh Park.

Jazz: Defeat Jazz at City Rush in the Future Site of Rokkaku Expo Stadium.

Love Shockers: Achieve a "Jet" ranking in Hikage Street.

Noise Tanks: Achieve a "Jet" ranking in Highway Zero.

NT-3000: Achieve a "Jet" ranking in Sky-Dinosaurium Square.

Poison Jam: Achieve a "Jet" ranking in Test Run mode at the Tokyo Underground Sewage Facility and the Bottom Point of the Sewage Facility.

Potts: Achieve a "Jet" ranking in Kibogaoka Hill.

Rapid 99: Achieve a "Jet" ranking in 99th Street.

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.

RoBoy: Achieve a "Jet" ranking in Chou Street. Note: A.ku.mu. must first be unlocked before you can unlock RoBoy.

Soda: Defeat Soda at City Rush in Highway Zero. Note: Soda was known as Slate in Jet Grind Radio.

Zero Beat: Achieve a "Jet" ranking in Test Run mode at Shibuya Terminal.

Immortals: Achieve a "Jet" ranking in Skyscraper District and Pharaoh Park.