I recently got my Wii U set up to emulate some older roms and found Retroarch to be the easiest and simplest way to play them all. The only problem I have is that it's kind of a pain to have to go to the homebrew channel just to launch Retroarch. I can't seem to find anything online about it and...
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi