Super mario 3d has some edge detect, everybody did see it on pre release screen, like i can see Mario Kart has none... Edge detect is the cheapest way to add AA and almost free, even compared to FXAA, there 's really nothing to brag about having edge detect AA. It's kind of a prehistoric solution.
If they could add MSAA/SMAA or even MLAA they would put some in their game for sure ("being conservative" not putting MSAA, is that a joke ?)
FXAA has been wide spread on last gen console cause it's damn cheap. On PC you usually have MSAA hopefully and some form of morphological AA (combined it can be great)







