Xiaolin Showdown Play as Chase
Defeat Mala Mala Jong in the last level of Adventure mode to unlock Chase.
Play as Jack
Get at least halfway through the game to fight the Jack Spicer Robot. Defeat it to unlock Jack.
Alternate costumes
To unlock new costumes, level up the rank from Grass Hopper in Training mode to Wudai. For some ranks it will unlock new costumes:
- Monk costume
- Showdown costume
- Robot costume
- Street costume