According to Nintendo's official Twitter page, they will be hosting a Luigi’s Mansion: Dark Moon launch party at Nintendo World on 3/23 at 5 PM ET. Check image here:
Dark Moon Party...hmm. Just make sure you don't slaughter any Goats (irl) that sort of thing is frowned upon. (See Sony's God of War Party) Wish Luigi a fun time. (Wrong link at top by the way, thanks thegamingadv.21 for correction.)
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