Professor Layton and the Unwound Future (Nintendo DS)

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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.

ChallengeHow to unlock
The Puzzle Keeper's HouseComplete 165 puzzles.
The Hotelier's HouseBeat all ten toy car courses.
The Messenger's HouseComplete all 12 parrot delivery errands.
The Storyteller's HouseComplete all three picture books.
The Time Traveler's HouseBeat the game.

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.

Top Secret Options

Once you acquire enough Picarats, you unlock the following options in the top secret section.

OptionHow to unlock
Additional Character ProfilesSolve all 168 Puzzles
Character ProfilesAcquire 4200 Picarats
Character VoicesAcquire 5000 Picarats
Game MusicAcquire 4700 Picarats
MoviesAcquire 5200 Picarats
Story ArtAcquire 4500 Picarats