Mario's Picross is a 1995 puzzle video game for the Game Boy. Developed by Jupiter and Ape and published by Nintendo, it is a compilation of nonogram logic puzzles. The game stars Mario who chisels away at puzzle grids to form pictures. The game initially received positive reviews, with reviewers citing its length and addictive nature as a positive, but its grid sizes and absence of typical Mario elements as a negative.

In Mario's Picross, the player is presented with a puzzle grid that they must chisel at in accordance with the numerical hints provided on the upper and left-hand edges of the grid in order to reveal a picture. In addition to the ability to chisel spaces, the player is also able to mark spaces with a cross to signify that the space is not meant to be chiseled. The numbers present outside the grid tell the player how many spaces should be chiseled within the row or column it is next to; if a single number is present on the row or column, there is that number of required chiseled spaces within said row or column, while if more than one number is present on the row or column, there are those numbers of required chiseled spaces, but separated by an undetermined amount of blank spaces. The player must use these numerical hints to fill in the grid both vertically and horizontally. Similar to a crossword, when a row or column is filled in, it is able to give hints as to the nature of the rows or columns it intercepts.