I was doing the post game gym challenges and decided to fill my dex with some pokémons from the mimikyu forest (Tagtree Thicket)
which is on the other side of the crater hole.
Went towards the Pokemon league (since the flag was pointing that way) jumped up on the building and on the rocks only to find the crater and the flag on the other side. Decided "might as well go around the rocky mountain path" to my surprise I found a Magnezone just flying about. Thought it was a fluke but continuing my journey I came across 2 more, making it 3 total, and 2 Garchomps, all around lvl 51-57.
https://imgur.com/a/Yr7jsjp (images with the location, just walk along that)
My question/request is if someone can try to replicate it and see if it really is a consistent spawn zone for them or if something else pops up, since it might help someone.
This was done on scarlet version 1.01.
tl;dr: magnezone near crater hole trying to fly away, saw more than 1, trying to see if it is a spawn location.