From GameBrew - a wiki dedicated to Video Game Homebrew.
NDS PICROSS is a homebrew version of picross. Puzzles range from 15x15 to large multi panel affairs, colored modes and puzzle creator also available.
To solve a puzzle, you need to determine which cells will be boxes and which will be empty. Determining which cells are to be left empty (called spaces) is as important as determining which to fill (called boxes).
Later in the solving process, the spaces help determine where a clue (continuing block of boxes and a number in the legend) may spread. Solvers usually use a dot or a cross to mark cells they are certain are spaces.
It requires internet access to get initial puzzles.
L/R - Next page
A - Start
D-Pad - Move
A - Fill square
B - Mark X in square
X or X+Left/Right - Change color
Y - Hint on/off
Start - Menu
- Initial release.