Now that you're the Pokemon Champion of Alola don't forget you can defend your title against 10 random opponets.
Today just happens to be the 1st of the month so Faba will challenge you after you face the Elite 4 instead of Hau. I haven't done it yet, but I belive you need to sit in the chair afterwards, which will trigger the title defense.
- If you want to battle everyone without having to battle the Elite 4 a bunch of times, you can apparently save right before sitting on the throne and soft reset until you face the challenger you want! (Haven't tried this myself, but seems like it would work)
If you'd like to see the full list of challengers you can check out this list on bulba! http://bulbapedia.bulbagarden.net/wiki/P...le_Defense