Serena's doubts...

Ash and Delia are on Alola after Mimey won tickets for their vacation... While they are on Alola, a familiar face is on Hoenn, Serena, trying her best to be the best pokémon performer she could be, but ultimately failing on winning competitions/contests.
What is she going to do? What happens to her while Ash is in Alola? Are they going to meet again?

P.s: Thanks for the cover, @INeededanAccountlol!