Board Thread:General Discussion/@comment-24252369-20131213225455/@comment-477304-20140109164813

Unless I'm mistaken, this is the list of all the Tornado planes:
 * Tornado: Red biplane owned by Sonic, later equipped with a rocket by Tails and given a slight paint job, later repaired after it's destruction and eventually restored back to it's original form.
 * Tornado 2 Prototype: A grey prototype biplane created by Tails to test the use of Chaos Emeralds as a power source. destroyed when it crashed landed.
 * Tornado 2: Blue biplane created by Tails, features an "x-wing" attack mode damaged when it crash landed after being used by Big. Later repaired and fitted with an additional seat.
 * Cyclone: Blue monoplane used by Tails with "Tornado III" written on the side, can transform into a walker mode and drive mode and was seemingly converted into a rocket ship in Shadow the Hedgehog.
 * Tornado-1: Red biplane owned by Tails, has the words "Tornado 3" written near the rear of the plane. Based on Sonic's original plane, has the "X-wing" battle mode that Tornado 2 has.
 * Tornado Racer: Yellow monoplane owned by Tails, mainly used as a road vehicle.

In addition, the Sea Fox had an upgrade in Tails Adventure which allowed it to fly, similarly Tails created a ship called the SS Tornado EX which was used to interdimensional travel and had the ability to fly. I suppose the latter could be counted as a Tornado plane.