Sonic the Hedgehog (Alternative Future Timeline)

Sonic (born June 23rd, 3224) was an anthropomorphic blue hedgehog, endowed with super speed, who was the co-leader of the Knothole Freedom Fighters, and the arch-nemesis of Dr. Robotnik. He hailed from alternative future timeline, where Robotnik ruled all of the known universe. So, he traveled into the past (to join forces with his past-self), to prevent these events from ever happening in the first place.