Nautilus on 21 October 2016
Hopefully.And if they dont charge for upgrade like they did with the Wii, it would be a good incentive for 3DS/Wii U owners to upgrade, on top of the games for The Switch.
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1
