Can we talk about how hilariously inconvenient and downright BAD this is?
I mean, they could've handled it better pretty much any other way.
You can ONLY transfer box one. That means you have to constantly go about switching games, and transporting an entire box is slow enough as is.
There are a million flaws with this, and all of them combined make the entire process go at a snail's pace. It's like Nintendo hates happy customers.