https://www.hackster.io/news/play-classic-atari-nes-and-sms-games-with-the-esp-8-bit-9161ca8879bc
This ESP32 emulator supports NTSC/PAL video out, and Bluetooth Classic an IR keyboards and joysticks.
sms gameswith theplayclassicatari
https://www.tindie.com/products/t1lt/sega-genesis-flash-cartridge-for-8-bit-sms-games/
Sega Genesis Flash Cartridge… for 8-bit SMS Games from t1lt on Tindie
sega genesissms gamesflashbit