Starting with Ubuntu 18.04, it is the latest version of SameBoy, a powerful Game Boy Emulator that can be installed via the Snap package.
SameBoy An open source user-friendly Gameboy, Gameboy Color and Super Gameboy emulator for macOS, Windows and Unix-like platforms.
SameBoy is extremely accurate and has a wide range of powerful debugging features, making it ideal for both casual players and developers.
SameBoy has all the features you expect from an emulator (from saved state to filter scaling), in addition to accuracy and developer features.
SameBoy can be installed on Ubuntu 18.04 or later via the Snap (run in sandbox) package. Just search and install from Ubuntu Software.
Alternatively, you can run the command to install the Game Boy Emulator on your device.
snap install sameboy
Once installed, launch it from the system application menu and enjoy!