The goal of this project is to create a port of NetHack for the DS utilizing the unique features of the DS to create an easy-to-use NetHacking experience.

Release notes:

Well, version 1.5 is now out, supporting text mode, complete with IBM graphics and full colour (both of which are, of course, optional)! To upgrade, just unzip the new archive straight over the old installation. As for enabling text mode, simply edit NetHack/defaults.nh, and comment out the OPTION line defining the tile settings. Feel free to remove the ‘ibmgraphics’ or ‘color’ options, if you like things a little more plain. 🙂

http://frodo.dyn.gno.org/~brettk/NetHackDS