Sonic the Hedgehog is the fastest thing alive. Along with his friends Tails, Knckles and Amy, Sonic speeds around the planet to battle injustice and defeat his .Sonic the Hedgehog is a video game franchise produced by Sega centering on a series of high speed platform games. Sonic, the protagonist, is an .The official home of Sonic the Hedgehog on YouTube! ESRB EVERYONE to EVERYONE . Visit esrb.org for rating information. Welcome to the official .