Before you flame me, i posted this in awesome hacking theories, and got no response. And i am well aware crown3ds is fake so dont bother bringing it up. This is purely hypothetical. I read somewhere around here, about a theory of creating a 1-1 flashcart that would essentially act as a retail cart, containing only 1 rom at a time. Now they were saying the problem with creating such a cart was memory size, as different roms require different size memory. So wouldn't the solution, then, be to make it have enough memory for the biggest rom's requirements and then bundle(or provide a download for ) a program that would write the appropriate sized partition for whatever rom your installing and then write the rom to that partition?