I think it is a bad idea what you're doing. Right now, with this idea of making PR into a DS version you're being very unproductive. For one, you are not contributing with the coding of making the DS engine, nor have a finished-enough DS engine to start any serious work when it comes to mapping, eventing, trainers and so on. So just waiting for someone to make a "ready for use Starter-Kit" is pretty pointless. On the other hand, if you were to continue with serious work on the RMXP version; since the RMXP games can't be ported to the DS, that would be pretty pointless too, as you'd have to redo all that work for the DS.
Looking at the other technical sides of making the game on the DS, you'd need to create the 3D models of the tiles you have. You'd have to rely on your programmer to further do codes and menus for you (to create originality within the game, and port your ideas such as the PokeStrap). All of this basically throws you back into the drawing board when it comes to your game which, again, I find pointless.
It wouldn't be an issue here, if you were just starting up a new game - then you could afford to experiment and look/wait for a starter kit on different platforms. I honestly don't understand what prompted this sudden change, in moving away from RMXP - it isn't limited at all. If you are looking for the 3D effect, it can and has been done in RMXP. If you are looking for online capabilities, they can and have been done in RMXP. If you are looking for new input/control methods, they can and have been done in RMXP. So I don't know why you say that RMXP is limited (any more than the DS is).
I think that with things being the way they are now, it will take years for a Pokemon Starter Kit on the DS to match the quality, and functionality of Pokemon Essentials. Maruno has done a fantastic job in taking care of the kit, and added so many new features which the public longed for. You can make a very good Pokemon game in RMXP with Essentials. You can't make a very good Pokemon game (yet) on the DS if it is not a ROM hack. That is why I think, that you waiting for a DS engine is very unproductive. It would be better to stick with what you have and what you know, and further expand on that. Right now it feels as if your just yanking your followers from one side to the other, not showing any real progress.