Hi!
This is one of the simplier (but still quite useful)
suggestions:
If you hatch an egg and it's a shiny, a notification will
pop up with the "" image.
It's just a bit painful to see a notification pop up the exact same
time when you see another notification (the world icon).
Same thing could be applied to the mega-able image:
I fully support this. It would be nice to know when a shiny has
hatched in your party, but also I can see why this hasn't been a
thing yet, you still have to go and empty your party for new eggs
anyways if you're hunting a specific pokemon so you would see the
star in the Storage menus.
However, this would still be nice to have especially when you get a
random shiny (like my Retro Cyndaquil - Haborym).