Kalos Academy (The chosen one reveals)

Five years ago,ash disapeared from the face of the world. All his friends and family thought he was dead, except Gary. But this wasn't true,he was actually training in my.silver that he was training to be a aura guardian and a assassins creed whom lived on the mountain. He also got to know that he had a sister and a twin whom also are assassins creed and aura guardians.After 5 years,ash is ready to go home with is brother and sister. He also finds out he is a chosen one of Arceus. Lets find out what happens?