Xiaolin Showdown Codes -
Play as Chase:
Defeat Mala Mala Jong during the last level of Adventure mode.
Play as Jack Spicer:
Defeat Jack Spicer during the Jack Attack level in Adventure mode.
Street costume:
Reach the "Grass Hopper" rank.
Robot costume:
Reach the "Martial Artist" rank.
Monk costume:
Reach the "Warrior Monk" rank.
Showdown costume:
Reach the "Wudai" rank.