Mario's Picross Cheats

If you're playing Mario's Picross with the Super Gameboy, you can change the color of the border (the one that loads with the game). This can be done if you hold the Control Pad in a specific direction when you press Start. Here, I'll list what buttons you must hold to make the border a certain color:

Start: Green Border
Left + Start: Yellow Border
Right + Start: Red Border
Up + Start: Black Border
Down + Start: White Border

To obtain the transparent Gameboy Border, rotate the Control Pad continuously in a clockwise direction until you hear a tone. Hold the Control Pad in that direction and press Start to get the border.