By looking for a way to port my RPG Maker games for NDS, I came along this sweet tool. http://globoeil.fr/vgmds/
It's a freeware RPG Maker like maker that you can run on your Nintendo DS using a flashlinker (like m3 or R4 card).
The maker offers an action battle system and a demo game in Zelda style is included!
Though I couldn't find a way to get my pc made RPGM games to run on my DS.. anyone any (positive) information on that?