The best mobile emulator is for Gameboy-GBc/Gameboy Advance, "Pizza Boy" amazing, you should definitely check it out, the emulation itself is nearly perfect as well : r/emulation
I 5 Migliori Emulatori di GBA per iOS del 2022
Best Gameboy Color Emulators for Android - JoyofAndroid
Convert Your Classic Game Boy into a Powerhouse Emulator That Plays Practically Any Retro Game « Hacks, Mods & Circuitry :: Gadget Hacks
NINTENDO GAMEBOY COLOR Development Is-Cgb-Emulator Intelligent Systems Wideboy EUR 3.499,99 - PicClick IT
GitHub - simias/gaembuoy: Game Boy Color emulator in C