Checking out this tiny but powerful 16gb retropie raspberry pi zero setup. Will work for the pie 3 as well!
Pi Zero W: http://amzn.to/2C6TZZL
Raspberry Pie Zero W KIT- http://amzn.to/2BpCt6i
Download this from our Pi Front Ends
Title “[16gb]-16gb.Pi.Zero.Bulging-Jake.Stahl”