I recently purchased a used copy of Pokemon Red off eBay, and the cartridge miraculously still had a save on it. The file belonged to "タイガ", they had beaten the game, caught a few Pokemon, it's a pretty ordinary little save file. This cart ended up bleeding into another project I had going on, which was restoring an old Kemco Pikachu link cable. So before the save battery died, I traded over all of タイガ's Pokemon to a flash cart, and saved them onto PKHex. I've uploaded the save file as well as the individual PK1 files, have fun!
You can watch the video I made detailing the entire process here: