Well, we have the ability to edit 3DS files nowadays, but so far it's been mainly translation and (un)dubbing. It's totally possible, but it would be an incredible undertaking and probably not worth the effort.Would it be possible to make a Remake of the first Pokemon Generation out of X/Y or OR/AS?
It's already possible. There are already 3DS games being translated, and I think I remember something about a hacker putting Ridley's model into Smash. I doubt there's a significant difficulty difference between being able to edit models and being able to edit textures, but I know nothing about that sort of thing, so who knows.Just wait here for about seven years. By that time, we'll have everything we need to start editing text and maybe even textures.