Akumajou Dracula: Gallery Of Labyrinth
Successfully complete the game with the best ending to unlock the Hard difficulty setting, Boss Rush Courses 2 and 3, Richiter and Sisters mode (start a new game with a different duo), Sound mode, and New Game+.
Play as Old Axe Armor:
Kill at least 1,000 Old Axe Armors and save the game. Start a new game to have the option of playing as an Old Axe Armor.
Hidden Vincent dialogue:
Play as Charlotte and stand in front of Vincent the shopkeeper. Hold Up until he begins speaking.
English voiceovers (Japanese version):
At the main menu, hold L and press A to enable English voiceovers. If you entered the code correctly, Jonathan will say "showtime".
Duplicate quest rewards:
Successfully complete a quest, then talk to Wind to display the quest menu. Press A(2), then when you hear the reward chime, press Start to exit the quest menu. You will now have the quest reward, and the quest should still be uncleared from the list. Complete the quest again to get the reward again. Repeat this as many times as desired.
Set your birthday in the DS system settings to the current date. Then, go to Vincent the shopkeeper and he will offer you a birthday cake for 3,000