Spirits DS by NightFox is a game inspired by Topo Soft‘s Spirits.

Release notes:

Good afternoon! We finally have a “walkable” version of Sprits DS. Walkable say that’s the only thing you are going to be able to do for now, walking through the castle, open doors and activating traps. The next step will begin programming all elements of the game’s storyline.

Thanks to http://www.nintendomax.com/viewtopic.php?t=13976&f=19 for the news.