>>33167374In my personal experience, it was faster and easier to get her through chaining with Sylveon. Trying to hatch one is a miserable experience because you have to deal with the possibility of going through hundreds of eggs only to get a shiny male.
With chaining, you can at least tip the gender odds better in your favor through Cute Charm, but nature, IVs and ability become a gamble. Also, you miss out on her egg moves, which include Belch, Fake Out, Knock Off, Sand Attack, and Snatch.
The one I caught is Rash nature, and her hidden power is Dark.