The Tornado

The Tornado is a red biplane owned by Sonic, though it is more often used by Tails. The Tornado only seems to have one seat, usually occupied by Tails, so any other passengers would be forced to ride atop the wings. The main purpose of the plane is to travel long distances and high altitudes, or to engage in sky chases and battles against Doctor Eggman's various flagships, such as the Egg Carrier ("Sonic Adventure"). In the "Dimension" saga, the plane is used as a combat vessel—such as during the  Giant Robot Restoration, in which it is used by Tails and Knuckles to aid in the destruction of the Doctor's giant robot. Additionally, Tails uses the Tornado to rid their dimension of all SOL towers, following the Xevian invasion. However, the biplane ultimately meets its end as it goes up against the Massive later on; its upgraded weaponry and integrated speed enhancements provide an admirable counterattack for some time, and as such, pave the way for a fitting last act: defending those in peril, as the Massive's laser cannons destroy the Tornado itself.