I have an old Raspberry Pi 1 (!) still going strong with Batocera Linux running NES, SNES and Mega Drive (Genesis) emulators.
I’m looking for easy multiplayer games that can be played with a 5yo. Non violent and ideally co-op, bonus points if somewhat educational.
Kirby Superstar (SNES) is great for this, I play it with my 5-year-old. The second player plays as the “helper” character, and when they die, Kirby can create them again. It effectively plays like a “buddy mode.” That game is also one of my all-time favorites just for what it is, so I’m a bit biased.