>>49484294This mass outbreak shiny with 1/152 chance of getting a shiny without a shiny charm works.
1) Disable autosave
2) travel to the area with the mass outbreak and SAVE there
3) travel as fast as possible to the mass outbreak site especially using braviary so you can see the shinies from overhead without being spotted. If shiny, land and save and catch the shiny. If not shiny, fast travel back to camp, attempt to travel back to jubilife/ancient retreat.
4) See if the mass outbreak is still there.
If there - repeat steps 2-4.
If not - reload your save
Pic related is what I got after 1 hour.
