Luigi won't be celebrating Halloween in 2012.
Luigi's Mansion: Dark Moon has been delayed in North America to the first half of 2013.
The follow-up to the GameCube launch title was originally scheduled for a Q4 2012 release according to information revealed at E3 2012. In a press-release in which Nintendo detailed the remainder of their 2012 3DS lineup, the company noted that the game will now be releasing in the first half of 2013. No reason was given for the delay.
The delay of Luigi's Mansion: Dark Moon creates a substantial hole in the 3DS 2012 line-up, leaving Paper Mario: Sticker Star, releasing on November 11, 2012, as the lone marquee first-party title for the handheld.