You could attempt to buff the scratches out with a plastic polish, not sure how effective or potentially destructive that would be though. You'd want to do some research first.
Dolphin supports that out of the box, no patching required. Just open the controls menu and bind your inputs. Dolphin even supports emulating gestures like shaking the wiimote.
The following link is for the PC, but android supports this as well...
People buying this will emulate Nintendo games and buy games on Steam. Valve sealed their victory over a year ago regardless of the consumer's choice of platform.
On the go tho I meant, I use my 10" tablet and a Bluetooth controller for retro gaming while sitting on my porch or on long car rides sometimes. Easier on my eyes than the Switch screen.
Ken unless the games are made for that screen size most suck on a screen that size... Having a square screen and being brighter and higher res helps but it's not a cure all, text is tiny bullets are tiny, your.... Well lol