This article is from the 2006 series of SMBZ and is no longer canon.
Miles "Tails" Prower is a yellow, two-tailed, anthropomorphic fox, and portrayed asSonic (2006 Series)'s best friend. Tails was once a young admirer of Sonic and wanted to be like him, even learning a few of his moves and practicing running. He and Sonic worked together from the events of Sonic the Hedgehog 2 to stop Dr. Eggman's Death Egg and the two have worked together since. Later games showed Tails' strong mechanical interest, where he would generally aid in actual fighting or otherwise work as support for Sonic handling technical means or navigation.
He was only seen briefly in SMBZ, in a flashback among Sonic's friends slain by Mecha Sonic (It's shown in Sonic's flashback that Tails had been strangled to death by Mecha Sonic).
While Sonic was riding on the wing of the Sky Pop in Episode 8, he mentioned that it reminded him of riding on the wing of Tails' plane, the Tornado.