Mobile Golf is a Mario Golf sequel that was released exclusively in Japan in 2001. It was compatible with Mobile Adapter (best known as the device that allowed to unlock the Celebi event in Pokémon Crystal), online tournaments were held during the first year and players could unlock extra content (courses, characters and clubs) as prizes.
Despite not having an RPG story, all RPG elements (experience, level up and skills) are still there and it's still pretty solid entry in the series and has a good amount of content (more than Mario Golf, indeed). You can consider it as a Mario Golf expansion.
The patch doesn't only translate the game, but it also adds some additional code that allows the players to unlock the locked content legitly and progressively as they play.
Translating this one has been a nightmare. The game uses a custom compression algorithm that needed to be cracked. Then a custom compression/decompression tool had to be written in order to inject translated and recompressed graphics (because Camelot decided to store almost everything as compressed graphics).
Where to download?Download patch at RHDNSourcecodeSourcecode & script dumpThe game doesn't boot up!
Mobile Golf uses a special 128kb SRAM battery that not every GBC emulator is compatible with. It doesn't have anything to do with the translation.