Registering a new 3DS XL along with Pokémon Mystery Dungeon or Luigi’s Mansion will allow you to download one of five games.

Luigi’s Mansion: Dark Moon has a multiplayer Hunter Mode, which can be played online with other players around the world. [Update: Details announced.]

Famitsu has tidbits about Luigi’s Mansion: Dark Moon and mentions the Nintendo 3DS game will have multiplayer modes.

Nintendo of America have released screenshots for some of the games that they announced release dates for this morning.

Luigi’s Mansion: Dark Moon has a new release window in North America in Europe.

Something scared poor Luigi right into next year.

Here’s a fresh look at Luigi’s Mansion 2, now called Luigi’s Mansion: Dark Moon.

Nintendo announced that Luigi’s Mansion 2: Dark Moon will be released this holiday.

Both will be released sometime this holiday for the Nintendo 3DS.

The short answer Shigeru Miyamoto told a group of press at a developer’s conference is because he wanted to make a new Luigi’s Mansion game.

Unlike the other 3DS games Nintendo showed today, Luigi’s Mansion 2 won’t be released until 2012.

Starting outside mansion gates, the Luigi’s Mansion 2 demo at E3 today began with Professor Gadd explaining how to use the Poltergust 5000.

Remember how Nintendo originally used Luigi’s Mansion to conduct 3D experiments?