This was an entry in the GBAX 2005 Coding Competition, the download link from there no longer works. It's listed in temp's download section but that just links to filetrip (R.I.P.), and I can't locate a working download via google. I did gather that there were multiple version releases, but the competition entry appears to be the newest and biggest file, so likely most complete (this...
Looking for old homebrew "Picross Advance" by Phantom
Looking for old homebrew "Picross Advance" by Phantom