Once you acquire enough Picarats, you unlock the following options in the top secret section.
Unlockable
How to Unlock
Additional Character Profiles
Solve all 168 Puzzles
Character Profiles
Acquire 4200 Picarats
Character Voices
Acquire 5000 Picarats
Game Music
Acquire 4700 Picarats
Movies
Acquire 5200 Picarats
Story Art
Acquire 4500 Picarats
The Diabolical Box Reopened Puzzle
After you've completed Professor Layton and the Diabolical Box, you'll be given a special code. These codes are unique for each DS system. Copy down that code, access the Top Secret bonuses of Professor Layton and the Unwound Future, select the Hidden Door menu, and input the code. You'll unlock the Diabolical Box Reopened Puzzle, an extra challenge that features the antagonist from that game.
Unlockable
How to Unlock
The Diabolical Box Reopened Puzzle
Complete Professor Layton and the Diabolical Box to obtain a code, then input the code in the Hidden Door menu of the Unwound Future.
Layton's Challenges
They are found under the bonuses section. Each one has a different way of being unlocked.
Unlockable
How to Unlock
The Puzzle Keeper's House
Complete 165 puzzles.
Layton's Challenges
Layton's challenges are the hardest puzzles in the game. They are found under the bonuses section. Each one has a different way of being unlocked.
As I said before , Mass Effect is an incredible universe. ME1, 2 and 3 focused on Shepard’s tale but set the scene for books and graphic novels to complement that story arc and chronicle the stories of other characters such as Anderson, and the Illusive Man whose adventures feed into the events we have already played through. It’s testament to BioWare’s creation that the tapestry is so rich that even after the main plot and the complimentary plots are taken care of there is... read more...
