Zendoku Codes -

Bonus characters:
Defeat the following characters in Quest mode to unlock them as playable outside of Quest mode.

Boom Boom 
Chips 
Djimhotep 
Hiroshi (Note: He only appears when playing as a character from the Hand to Hand Dojo) 
Jun-Jie Long 
Kaye-Rah 
Lorraine 
Sando (Note: He only appears when playing as a character from the Weapons Dojo) 
Suwedi