Luigi's Mansion: Dark Moon apparently won't be spooking Nintendo 3DS owners until some point in the 'first half of 2013," says Nintendo. The game was originally planned for a holiday 2012 launch, per an announcement at this year's E3, but now won't be making that window. It's unclear if the game was delayed outside of "The Americas," as Nintendo only released information on that version.
Nintendo didn't give a reason for the delay, nor did the company give any more specific of a launch date for the game. Spooky business indeed.