Five more shinies today: Hoppip in Pokemon Go's Hoppip event.
Also these games have a thing for ghosts.
In Diamond and Pearl and in Brilliant Diamond and Shining Pearl, when you visit the Old Chateau you might spot the ghost butler in the dining room or a ghost girl walking out a room upstairs, in the remakes, one of the rooms has a picture with glowing red eyes which vanish as you approach it.
In Black and White there's a ghost girl on Marvellous Bridge, a old woman nearby fills in her backstory and the sequel games expand on her with the Strange House.
In XY in one of the buildings in Lumoise you're followed out the lift by a hex girl trainer who's levitating, she says "you are not the one." and moves off screen.
In ORAS on Mount Pyre you help a old man and woman with the Team and later on after Delta episode the old woman vanishes and a Gym Leader Phoebe mentions her grandmother passed a long while ago hinting she was a ghost. Phoebe's first gym battle also has a ghost girl present.
I've already shown a vid of the Training School haunting of Ultra Sun and Moon in one of my previous posts.
Pokemon Sword had a girl outside a old building give you a letter, that you give to a grandfather in another town, it was his childhood friend who passed.