Luigi's Mansion: Dark Moon comes to the 3DS on March 24, one highlight among several release dates Nintendo announced for its (northern) spring lineup this morning.
Additionally, Pokémon Mystery Dungeon: Gates to Infinity arrives on the same date. (It released in Japan in November.) Other dates given in the lineup have LEGO City Undercover launching March 18 on Wii U, and its 3DS counterpart LEGO City Undercover: The Chase Begins coming to 3DS on April 21.
Shin Megami Tensei: Devil Summoner: Soul Hackers also comes to the 3DS on April 16.
Monster Hunter 3 Ultimate arrives March 19 on both Wii U and 3DS. A news release from Capcom said the game will be available for digital purchase on both systems "during this launch timeframe", and that a demo would be made available on February 21.
Activision's The Walking Dead: Survival Instinct, the so-called FPS adaptation of the television series, comes out March 26 on Wii U.