Mario's Picross Super Game Boy colors: Note: This code requires that this game is used with a Super Game Boy cartridge in a Super NES console. Enter one of the following codes during game play to change the background to match the corresponding Game Boy case colors. Code Color Hold Start Green Hold Right + Start Red Hold Up + Start Black Hold Down + Start White Hold Left + Start Yellow To change to the transparent Game Boy, sweep the D-pad continually in a Full-Circle until a tone is heard. Hold the D-pad in that direction and press Start. Deleted saved data: Highlight a saved data file, then hold A + B + Select to display an option to delete that file. Time trial mode: Successfully complete all the puzzles in Picross mode.