It actually sort of worked like a calculator. Game and watch were the first to console ever which have the D-Pad released in 1982 by Yokoi. :)) That’s when Yokoi got his Brilliant Idea One day in 1979 on a Train ride home Gunpei Yokoi some individual just playing with their calculator (yeah We’ve all done this during Exams if you are allowed to use the calculator in the Hall. The evolution of Nintendo Handhelds was pretty Amazing!. It had several iconic games such as Pokémon Ruby and Sapphire, Wario Ware Twisted, Castlevania: Aria of Sorrow, Legend of Zelda: A Link to the Past with Four Swords and many more. The Gameboy Advance or GBA Emulator was a truly revolutionary portable.
You can check out the Best Gamecube Emulators right here What is Gameboy Advance Emulator? So you can select the BEST emulator according to your PC specs and needs I personally tested and reviewed these GBA Emulators.