Treasurefan02 (http://www.youtube.com/watch?v=DiNd3F52i7g):
THELASTLAUGH - Will allow the 'scene selection' option in the tweaker menu (pressing mode and start)
FASHIONSENSE - will cause the colours on screen to look weird
TOTALCONTROL - Will allow the 'operational control' selection in the tweaker menu. This allows you to edit how the enemies behave in the game, and other options. A and C buttons allow you to move through the data columns and MODE + C or MODE + A allows you to change the enemy.
BLOODTHIRSTY - Is a blood code where your main character? spurts out blood when attacked (which has some nice animation)
ALLAVAILABLE - Seems to unlock all of the? stuff for the 1 on 1 combat mode
My guess is that LITTLEPUPPET and SPIRITSHADOW seem to relate to the? main character's special moves.


Other codes (akajackfrost (http://www.youtube.com/watch?v=DiNd3F52i7g)):
INFINITEIPSI
INDIAN SWAMP