- Executive Meddling: The European version of this game was heavily marketed by Nintendo of Europe as a Brain Age-style puzzle compilation instead of an adventure game with quirky characters, to the objections of Level-5 president Akihiro Hino. This is best demonstrated by its cover art◊; the European version pushes Layton into the corner and puts its focus on the puzzles. In the end however, this turned out to be a good thing as Europe became Professor Layton's biggest international market by a wide margin, and all future American covers take cues from the European ones.
- Fan Nickname: Throughout the game, pieces are acquired which ultimately get assembled to form a robot dog, which will sniff out hint coins. The player gets to name this dog; many players call it "Gizmo," since the pieces from which it's formed are identified as "strange gizmos."
Trivia / Professor Layton and the Curious Village