A mini computer like Raspberry Pi changed the world in a creative way. The year 2016 shows a lot of retro gaming revive back with modern technology. Nintendo itself released an official NES Classic Edition in November, and it sold out in every store.
But there are projects which leverage on Raspberry Pi and Retropie operating system. One of the members from Sudomod forum shows a Wii U controller being modified and it is running RetroPie. It features a 6.5-inch HDMI display, a Teensy 2.0 for the input setup, 3400 mAh dual batteries and an external SD card slot. It cost $195 to build one.