Found two random shinies almost back to back. Fletchling was the first which was cool, but then I heard a sparkle sound and came across my sixth team member.

Yes! Shiny Litwick has been found after over 20 hours of running up and down a hallway!

While fleeing the attacks of an alpha Litwick while shiny hunting in the sewer, I came across a shiny Klefki! Phase 1 for the Litwick hunt, which continues on