This page contains Professor Layton And The Diabolical Box Unlockables for Nintendo DS called "Concept Art Collection" and has been posted or updated on Sep 22, 2010 by realcute08. Let us know what you think of this Unlockable by thumbs voting.
Concept Art Collection
Complete Professor Layton and the Unwound Future to obtain a code, then input the code in the Hidden Door menu.
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