Looks like a lunch box, probably enough room for a sandwich, carton of Um Bongo and some crisps. But this hard case is for the DS, any version fits thanks to some extra foam pieces for the smaller models out there. From DS to 3DS XL, it can comfortably stuff them all in. But not all at once, it isn’t magical.
It seems there aren’t any 3DS XL cases for sale yet, so my local Gamestation were offering these things instead. Not as fashionable as a nice leather case (the DS case fashion scene is pretty big!) but it does the job. As you can see it also takes six DS games, but 3DS games won’t fit thanks to the little extra plastic they have hanging off their heads. No magical foam pieces here to fix things right.