Years ago,a war has begun,one day,a man met a Floette with a mysterious flower than any Floettes has,but it was going to die.
The man build the ultimate weapon,but warriors and Pokémon died by the explosion of the Ultimate Weapon.

Years later:

Ari's POV:

The journey begin in Kalos Region,my adventure,my adventure begins.I'm Ari,I'm the new girl in Kalos and I want to explore all Kalos,especially Lumious City,with my friends:Shauna,Trevor,Tierno,The Mr.Know it all Zachary,and the Mysterious man in a purple cloak,we're here to make friends with Pokémon,battling with trainers and stop the evil plans from Team Flare.

I'll tell you how it began.