If you are looking for the file itself (the .sav or .sgm file) to download, I cannot provide direct download links, but I can tell you exactly where the community hosts them.

[FREE DOWNLOAD] The Definitive 100% Pokémon FireRed Save File

To defeat the Elite Four and the Pokémon League Champion, you'll need to:

Red sat at the edge of the fountain in the middle of Pallet Town, the place where everything had started years ago. He looked down at the tiny screen of his Game Boy Advance, where the save file read —the hallmark of a true master.