Nobody did the research, so that list doesn't exist.
Also, I think the altar issue shouldn't really be a thing, since if you're using a completed story,
you can jump between worlds, so it isn't a big deal.
(you can have both altars in the same game.)
Information as per https://github.com/kwsch/PKHeX/blob/master/PKHeX.Core/Saves/SAV7.cs
Above shows offset and size.
1. Copy paste from a completed save into your save
2. Load the save into PKHeX (so that it fixes the checksums for you)
3. Export the save
Got a bunch of new ones today at Squirtle event:
-Acid Weezing
-Fury Cutter Pinsir
-Air Cutter Dodrio
-Stomp Hitmonlee
-Quick Attack Staryu
-Dragon Breath Gyarados
It's really the right method to collect them.
Will update the list.
I'm quite worried however for Omastar and Kabutops because of the rock event many people released their old ones.