This tweet sums it up nicely.... what a nightmare.
Don't forget: The 2DS can play any new 3DS game, except NEW 3DS games, which don't work on the 3DS.
https://www.trueachievements.com/gamercards/SliferCynDelta.png%5B/IMG%5D">https://www.trueachievements.com/gamer/SliferCynDelta"><img src="https://www.trueachievements.com/gamercards/SliferCynDelta.png