A quick fix to the photo provided by Ceuse. Should make remastering easier.
Plus British English part of the Text:
Make the most of your two player Game Boy games! Just link your Game Boy system with a friend's (see diagram), and experience multiplayer madness. Challenge a friend with any of the link cable compatible games, such as Tetris or Star Wars Racer. Link up two versions of Pokemon, and you can fight frantic duels or trade Pokemon to complete your collection!
Perhaps other natives can help with translation as well.