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.
I was going to recommend Bomberman. Super Bomberman 4 on SNES in particular is very fun, you can grab not only bombs but opponents too, and there are cool mounts with special powers. A bit chaotic in some arenas, but the classics are still there of you want them, and then when everyone gets better ot wants a quick laugh, you can go for the crazier ones.