Thank goodness for the repositories. Because I didn’t realize it existed at first and tried to install manually. I’ve lost all patience for some manual installs such as this one which reminds me a little of the old days. You install something missing only to find it goes a little farther until something else is missing. Dependency hell anyone? Anywho…
sudo apt update
sudo apt install dolphin-emu
Game ISOs here.
I found Luigi’s Mansion ciso (which I own) and started it. The into started and appeared to run smoothly. But I couldn’t play by keyboard…I assume.