Tails

Miles Prower, who is better known by the nickname of Tails, is a flying, two-tailed yellow fox from the Sonic the Hedgehog series. He is a sidekick to Sonic similar to how Luigi is a sidekick to Mario. Tails has the ability to spin his tails like a propeller, and thus fly. In Mario & Sonic at the Olympic Games and Mario & Sonic at the Olympic Winter Games, he is voiced by Amy Palant.

''Mario & Sonic at the Olympic Games
Tails participates in Olympic events in Mario & Sonic at the Olympic Games. He is a Skill type player, with skill and stamina being his best stats. Ironically, he is quite slow in this game, while he is quite speedy in the Sonic games.

''Mario & Sonic at the Olympic Winter Games
Again, Tails participates in the Olympic events, this time in Mario & Sonic at the Olympic Winter Games, the sequel. Tails is a skill type player again. His stats are given on the official site as well.

Tails made an appearance in the adventure mode of the game for the Nintendo DS. In the game, he decides to help Sonic and Mario on their quest. Tails even makes remarks about Mario when he and Sonic first meets the fox, thus showing that Tails respects Mario due to his heroism (similar to how he respects Sonic).

''Mario & Sonic at the London 2012 Olympic Games
In the third installment of the Mario & Sonic series Mario & Sonic at the London 2012 Olympic Games, Tails makes another appearance as a playable character. He is a Skill type player once again (like in the two previous installments).

This is the first game in the series to introduce Kate Higgins as the new voice actress of Tails (who takes over from Amy Palant).

Super Smash Bros. Brawl
In Super Smash Bros. Brawl, Tails appears in the background of the Green Hill Zone stage, as a cameo. He can occasionally be seen running through the loop in the background, alongside fellow Sonic characters, Knuckles the Echidna and Silver the Hedgehog. Tails also appears in the form of a collectible Trophy and Sticker, but doesn't appear anywhere else in the game.

Profile
''Sonic's buddy Tails the fox can fly thanks to his bushy tails, and he possesses a wide range of Skill-based abilities that will make him formidable in a wide range of events. He can jump and accelerate well, so he will be tough to beat in many races.''

Profile
''Miles "Tails" Prower is Sonic's best friend and always at his side. An ace pilot and mechanic, Tails returns to the Olympic Games with the Tailspin ability on the Wii and DS to spin his tails like a helicopter and propel himself in the air, as well as the Propeller Dash ability on the DS.''

Profile
''Sonic's buddy Miles Tails Prower is a fox that can fly, thanks to his bushy tails, and he possesses a wide range of Skill-based abilities that will make him formidable in a wide range of events. He can jump and accelerate well, so he will be tough to beat in many races.''

Personality
Tails before was very timid and over-reliant on Sonic due to his lack of belief in himself, but overcame that when he managed to defeat Dr. Eggman on his own and stopped him from blowing up Station Square. Ever since, Tails has taken notice of Sonic’s partial immaturity and now makes his own decisions, although Sonic’s sarcastic nature has rubbed off in him. Tails, for his age at least, is a genius in mechanics and technology, despite being a pretty normal kid otherwise. Over time, Tails has proven himself to be almost as strong and brave as Sonic by joining him in fights with Eggman’s robots, or creating inventions to non-directly aid him on his quests.

Trivia

 * His full name, "Miles Prower", is a pun on "miles per hour".
 * Tails was thought to be an unlockable character, along with Sonic, in Super Smash Bros. Melee, but this turned out to be an infamous 2002 April Fool's prank set up by Electronic Gaming Monthly.
 * Tails, Dr. Eggman and Amy Rose are the only Sonic characters that have formal names.