• Change Sega Intro

Start the GBA with Jet Grind Radio and continuously press the A button until the Sega logo appears. You will hear a person scream the word Sega instead of the normal longer chorus.
  • Unlock Poison Jam

Beat all Kogane-Cho levels with a Jet ranking.
  • Unlock Professor K As Playable Character

Play through the game (beat ''Final Stage'') and save. Professor K can now be chosen as a playable character. He is located between Garam and Beat on the character selection screen although his image is static.
  • Unlock The Love Shockers

Get a Jet ranking on all Shibuya-Cho levels.
  • Unlock The Noise Tanks

Get a Jet ranking on all Benten-Cho levels.