The first images of CoroCoro has been revealed, showing a new game for the 3DS coming this winter called Pokemon: Mysterious Dungeon: Magnagate and the Infinite Labrynth. It's coming to Japan this year. In this game, you start off as a character who turns into Pikachu as you fall into a dream. Partner Pokémon are Oshawott, Axew, Snivy & Tepig. This game is in full 3D. Unlike past games, this game appears to be standalone, rather than having two versions
It features a variety of Pokémon including Pokémon from Unova such as Gurdurr, Hydreigon and Virizion. You receive Quest Requests from Dunsparce, Cofagrigus runs a store, to which we don't know the details. Rampardos runs the Treasure Store. Kecleon returns, having the usual Goods store, with many items around it.
Finally, it has an Augmented Reality feature. If you scan things, they become Magnagates, which open up paths to new dungeons for you