>>712570598If you don't mind looking up the sets, there's both a spreadsheet with the sets and a battle calculator with all the emerald factory sets in it already.
In level 50, as the other anon said, up to set 7 the pokemon in that set will always be the same so if you only care about getting the gold symbol you shouldn't have to deal with figuring out which mon you have in front of you.
In level 100 you get every single possible pokemon out there starting on set 5.
>>712571690Those shitmons only appear in sets 1-3 in level 50. Starting from set 4 you can't get those anymore.