Unlockables

New Game+ - Once you complete the game with any normal ending or the true good ending, after the epilouge scene, you will be prompted to save. Save to a new slot, this will be data to start a New Game+.

Load the data and Flight & Plan will be in Kaito's room with a whiteboard. View the board to select options like (not in order):

Bring over all Sage Stones.
Bring over all collected Demon data.
Bring over character levels.
Bring over each character's accumulated Code.
Bring over total Experience pool.
Bring over Free Battle levels unlocked.
Increase difficulty.
Enable all allied characters as playable from the start. *
Enable all enemy characters as playable from the start. *
Bring over Alchemist atelier data.

*Relevant character data must be bought from the Alchemist atelier in the game. Data appears after you have defeated and/or encountered the character in battle before, whether ally or enemy.