Sorry to bother, but I noticed you had a post a while back about uploading rom images of GBA games onto dev carts using the ds r4 cards, and was wondering if the same could be done on DS dev cartridges, with say, 3ds home-brew? Just curious. I have a DS dev cart and was looking to do something along those lines. Heres a picture.
Even if it is possible something you need to keep in mind is that a lot of dev cartidges or disks only work on special dev versions of the console. I'm not sure if this is the case for the ds carts, but its something to keep in mind.