CAL4M1TY on 09 November 2008
That's pretty tough, but I'll go with Gameboy pocket.
I had a gameboy fat and a gameboy colour, I didn't find the portability that useful, and it basically did the same thing as the gameboy fat but the gameboy colour (thought slightly bigger) had a colour screen.
My gameboy pocket was blue though, which was a pretty slick colour.
