I'd have said https://gamefaqs.gamespot.com/gba/921905-pokemon-emerald-version/saves but apparently some time since their decline in 2007 they combined all 3 games on the same page and now you can't even tell which one it is, congratulations btw you don't need "decent" progress, just the pokedex and 2 pokemon in your team
How do I convert a .sps save file to a normal .sav file? And why are they in this .sps format to begin with?