>>58550956they exist, but it's obviously going to be quite hard to add new content into a 3DS game compared to a GBA game, especially when the GBA scene has so many tools devoted to that kind of thing.
DS Hacking is only now starting to go further than "mess with the teams and encounters" and thats basically where the 3DS games are as well. A few are more interesting and swap some textures to make new regional forms and things like that, but it's essentually impossible to make something as original as the Gen 3 hacks.