Pokemon Timetravel Distursion
When the Kalos Region was destroyed by large roots, Zygarde and Greninja failed their mission and died. All people and Pokemon have also perished!
In the Vortex of Space Time and Dimension, Arceus, alongside Palkia, Dialga, and Giratina, command all of their Celebi The Time Travel Pokemon to hire Ash Ketchum and Pikachu alongside his Pokemon that won on the World Coronation Series, including Z Rings, Crystal, and the Mega Keystone to go back in time to stop where the roots originated.
Disclaimer: I don't own the any Pokemon, Characters, Location etc. This is an Imaginary Story, which is non-canon to the original Pokemon Anime.
