Atelier Marie Plus Codes -

Best ending:
Have Marlone and Schia both at level 50 at the end of the game to get the "Two legendary people" ending.

Bonus option:
Successfully complete the game. When the game is started again, a "Bonus" option will be unlocked. Select it to access "Art Gallery" (view artwork), "Music Theater" (sound test), "Central Theater" (view endings), and "Playpen" (play mini-game) options.