Burger Paradise International's rom can be downloaded here:
https://wowroms.com/en/roms/nintendo-gameboy-color/burger-paradise-international-japan/10610.html
mGBA which is one of the best emulators for GameBoy, can be downloaded here:
https://mgba.io/downloads.html

A great site to download ROMs, Games, Emulators at https://techtoroms.com/