adafruit_support wrote:The Raspberry Pi needs a good amount of power, and a display will add to that load. I'd figure on around 1A at 5v. One of these should keep it going for several hours. https://www.adafruit.com/products/962
adafruit_support wrote:Not familiar with the Game-Boy controls myself, but if you post that question over in "General Project Help", somebody might have a good answer for you.