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 the game. From now on Professor K from Jet Set Radio can be chosen as a playable character. He is located between Garam and Beat on the character selection screen (you can't see him dancing like the other characters, only his picture appears).
Contributed By: Zool.
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.
Change the Sega intro
If you 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.
Contributed By: Lollybomb.
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