While chaining for a shiny Igglybuff, I didn't realize that my rockruff Sunset Town was so close to evolving! I decided to stop chaining and just catch the igglybuff that refused to call for help, and apparently really wanted to kill my Espeon Andariaa. So I battled with Sunset Town in order to keep Andariaa from fainting. Then he leveled up to level 25, and evolved! Happy Evolve Day to my little goofy shiny rockruff, Sunset Town!