You can participate in the Pokemon GO Morelull Spotlight Hour and get Shiny Morelull by following this guide.

Pokemon GO Feebas Spotlight Hour participants can evolve Feebas into Milotic and get Shiny Feebas by following this guide.

Pokemon GO Golett Spotlight Hour increases the wild Golett spawn rate and presents a chance to get Shiny Golett. Traversing the map during the event results in multiple Golett encounters.