Confirmed appearances for Nintendo's E3 2017 digital event include Super Mario Odyssey and "other Switch games" launching this year. The second player will control a new character named Cappy, that looks a lot like a floating hat.
Playing as Mario remains roughly the same as it has always been, as he's able to run and jump as usual.
On the agenda this time around was everything from the game design of Super Mario Odyssey to Koizumi's coffee brewing habits - it is an ask me anything, after all. In co-op mode, Cappy hovers at a slight distance above Mario's head, and an onscreen prompt also appears to explain the basic controls.
This type of two-player mode also seems like a way to protect Mario from incoming enemies.
He did, however, give them his blessing "to try and make a Mario game that has never been made before", and an arm-cannon wielding tactician is possibly one of the only career paths the plumber has yet to explore, already being an accomplished doctor, artist, racing driver and Olympic athlete. Players will be able to fly around, attack enemies and do actions that Mario is not capable of doing, according to IGN.
There's a number of interesting points about this, which make co-op ideal for Switch and for novices to join the play.
Check out co-op mode for "Super Mario Odyssey" in action around the 4:30 mark.
This capability stands in for the power-ups of previous Mario games, and works perfectly in a world where you're constantly looking for new ways to get to unexplored areas and solve each world's puzzles.
Those who can recall playing the star in Super Mario Galaxy, which had nearly similar two players local co-op mode can identify with the latest one.
Showing a demo of the mode during the stream, game director Kenta Motokura said that the Switch's two detachable controllers inspired him to add co-op controls.