In Ultra Moon, I found two random-encounter shinies (post obtaining the Shiny Charm) within like 48 hours of each other about a month ago. An Inkay (11/22) in Poni Wilds. It was a Female I nicknamed "Saffron". Evolved it into a Malamar. And a Scraggy (11/24) in Route 17 outside of Po Town. Another Female, I nicknamed it "Rubbermaid". Evolved it into a Scrafty.