Modder Hailrazer took a GameCube and some other electronics, stripped them down and created the portable GameCube you see above. The case was from a Datamax Kid's Delight, the screen was originally used for the PSone system and the insides are made up of a GameCube, Wii Classic controller and a Dreamcast Quantam Fighterpad.
The mod took over 90 hours to create, but the end result is a thing of beauty. The portable GameCube runs on batteries or an AC outlet and a back cover is being worked on to protect the CD.
Hailrazer will make you one, but it will run you $700 to make. Neat project, but not worth the price.