Nintendo is touting this as an action adventure game, the last Chibi-Robo came out in 2013 and was a 3D polygonal game where you controlled a little robot that cleaned houses, while taking pictures with the built in camera for the 3DS. It was kind of fun, but this looks much more interesting. This version of Chibi-Robo is a side scroller, if you've played Chibi-Robo before you know that he has a power cord that he uses to get electricity to power himself. In this game it is used as a weapon, like a whip. There will be an Amiibo to go with the game, which seems to unlock power ups as well as in game collectibles.
If you want to watch the announcement check out the YouTube video below.