After the loss

Ash Ketchum have traveled 6 region and participated in many league but never able to win.after the close loss in kalos league Ash have been unusually quiet,one day while watching his Pokemon playing the suddenly realised something that changes his life.
what does he realise?
how does it changes his life?
to know read the book.
also this is my first book so please don't kill me.
I DON'T OWN POKEMON