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.
Lots of other great suggestions. But I do think the consensus is multiplayer games with coop.
Konami beat ‘em ups like TMNT, The Simpson, Xmen would be great.
I’m also going to throw in Party games or kart racers, CTR and Mario Kart of Mario Party or Crash Bash would also be great
That said Pokémon might be a nice option too though not sure how you’d play that together.
Or edutainment like Gizmos and Gadgets or Jumpstart