Pokemon : Legend of the YingYang Kyurem

Join twins Mason and Chris, along with childhood friend Amy, in their adventure across the Unova region!
Will they be able to stop the notorious new villains, Team Shadow, from darkening every Pokèmon's heart?
Will they be able to conquer their dreams of becoming Pokèmon masters?
Will they meet new friends along the way?
Why are you still reading the summary you crazy kid, just read the story! ^_^