I shall reply. Im at work at the moment trying to get a job done on the production printer and having a heck of a time with it.
Granted the official publishing dealie costs cash, but I was not talking about official publishing. There is a whole underground console development scene, where people reverse engineer and devlop thier own hardware and software for programming for these consoles. As long as the official N docs are not used for creating these devices, it is perfectly legal. The cart downloader costs 35 bucks and a 64 meg GBA carts are 106. You can purchase them from
www.lik-sang.com or check it out at
www.visoly.com. Emulators are available at
www.gbadev.org and
www.devrs.com. I would recommend doing as i do and learn to program with the emulators first before dropping dough for the dev kits...