The color.
Gameboy Color
the color
dell?
The most common colors for portable canopies are blue, green and white. There are several companies online that also offer custom covers that allow you to design the canopy in a color you prefer.
Based on my knowledge, it was the iBook.
There are many portable photo printers on the market. A highly recommended one is the Canon Selphy CP730, which has a large color screen and an extra battery pack.
I recommend Viewshock. this portable monitor is cheap, while having the outstanding parameters(color gamut, contrast ratio, brightness and others). you can google viewshocker portable monitor, and you will find its official website.
Hewlett-Packard offers small printers that can be carried around. If using them in a vehicle, you will need a special adapter so that you can plug them in. You may lose print-quality in getting something portable.
This option having an mp3 on your portable radio is available now thanks to new technology. Sony offers hundreds of differen't options from color to shape to size. You can even customize the radio.
Portable toilets are extremely portable as long as you have a truck to move them.
Umm if you mean the gameboy before gameboy color then gameboy color of course. It's a more advanced portable system and offers better quality games.