Miles Prower (Earth-6536)

Miles "Tails" Prower is a genetically altered fox created by Doctor Eggman. As a result of Eggman's experiments, he was born with two tails, hence his nickname of "Tails". Deciding to become a hero much like Sonic and reject the evil intentions of Eggman, Tails became Sonic's best friend and ally through his quest to protect the world.