Serena and the Dimensional Doom in Alola!

Serena is on her way to the Alola region but its not to see Ash like everyone thought! Ash is still in Kanto and Serena has been in Hoenn for two years and then she came back to Kalos for a year but Professor Sycamore had told her about the Alola region and how he has a friend who is also a Professor there. Serena dec...