BLOOD, SWEAT and TEARS (Sonadow)

I dedicate this book to Shades365 and other people who helped and inspired me to make this book :) I also will be borrowing Shade's ideas from her sonadow book to this, but don't worry! There will be original contents in here as well :)
Sonic, the hero of Mobius, and the world, went on a long long trip with his brother, Tails and friends after sending Eggman to jail in their previous battle, which the doctor almost succeeded in being the world dominator
Shadow, a lonely vampire king, along with his brother, Mephiles ruled the vampire kingdom together. They have to keep their kingdom as a secret or else it'll risk the lives of their people and them themselves. Unfortunately, GUN knows about their existence and is trying to hunt them down. To the GUN, Shadow was believed to be cruel and merciless towards mortals, or was he?
What if the two hedgehogs encounter each other one day?