He was only twelve when it happened a lot of people think he was born with his outrageous speed and his other abilities but in truth it was an accident.
Sonic wasnt always a blue hedgehog like he is now. He was once brown like a regular hedgehog, and he was shy, hardly stood up for himself. He spent most of his time wandering around the forest of his home, just daydreaming mostly and looking for excuses to be carefree. One day while he was wondering, he stumbled upon a strange metal structure with a metal wall around it. Being a curious fellow, Sonic found a way in over the wall despite the barbed wire and cameras, and made his way inside the structure. He soon found himself outside a large room, and when he peered inside, he saw a strange egg shaped man in a white lab coat standing in front of a computer, and near the computer, was a glass dome with seven rainbow gems inside, and outside the dome were four glass spires, with three gold rings on each of them.