Bits and Pieces (A Pokemon Story)

Zushi Rant, a 10-year-old boy who wants to follow his all-time idol Red, lives in Fleet Village beside Aspertia City. He lives with his childhood friend Midosa Yori, who is the same age. They both use themselves and their Pokemon to guard the cave behind the village. No one, not even them, knows what is inside the mysterious cave. 2 years later, Zushi and Midosa are living a normal life until they hear about a mischievous group named The Reborn. The Reborn goes around the Unova region, causing trouble in various towns and cities, and soon come to the peaceful Aspertia. They already sense something coming from the cave from Fleet Village. What exactly do they want to achieve?