Luminous Arc [NDS]
When you beat the game watch through the ending/credits and when the word "Fin" pops up hit A and you will be prompted to save. When you save there will now be a star to the right of the file. Reload the file you will start a new game with all your equipment/characters/levels and if you had any blue hearts for characters they will turn back to red. A bonus area will also be unlocked north of where you start off.
Successfully complete the game, then press A when "Fin" appears after the credits, and save the game when prompted. Load the cleared saved game file to restart the game will all previously attained levels, characters, and items. You can use any character in random battles. You will also unlock options at the "Extras" menu that allow character profiles to be viewed, look at dialogue from the chapters, and listen to the music, sound effects, and voices. Additionally, a new area called "Mysteria Ruins" can now be accessed to the north of the starting location.
To level up easily, cast any healing or stat-boosting spell or ability on a character. If the affected character(s) is at a higher level than the person who cast the spell or ability, it will give them 30 experience points.