Although Nintendo has yet to officially announce the feature, its Luigi's Mansion: Dark Moon website revealed that the Next Level-developed title will support multiplayer.
"With so many new places to explore, all new ways to capture ghosts, and a brand new local multiplayer mode, Luigi's Mansion: Dark Moon is another star turn for Mario's heroic brother—and it's only on Nintendo 3DS," reads Nintendo's site, despite still listing the game's number of players as '1'.
The real question - what will this multiplayer entail? Competitive? Cooperative? Number of players?