Ideally, I should be able to power it from a Pi Zero(without an external power supply.) The resolution should be at minimum the NES resolution(256x240.) 'Small' as in around 2.5 inches(6.35cm) wide.
I'm also interested in solutions to write pixels to the screen directly instead of showing the, but that isn't mandatory.
If you could point me in the right direction, that would help me a lot.