Tornado

The Tornado is a vehicle created by Sonic the Hedgehog and now owned by Miles "Tails" Prower. It is a large red plane used on missions or simply just transportation across the island.

Sonic And Tails
In the episode, Tails is seen working on the bi-plane under the heat of the sun and on the beach, until Sonic arrives on the wing of the plane. On it, Sonic hands a device over to Tails who reads there is an emerald near by the beach. After a quake hits the ground, Sonic dashes from the plane into the smoke cloud.

After Dr. Robotnik is defeated, he sits angrily. But then, he discovers that a Monkey Dude has found the Master Emerald. Robotnik is thrilled and seeks a way to get to that island. He looks menacingly at the Tornado as he is going to take off with it.

& Knuckles
When Knuckles protects the emerald at all costs, also from Ray, who was missing his friends. Three Rhinobots oppose the echidna. After destroying them, Robotnik takes the Emerald whilst riding the plane. Reading "SONIC F" on the plane, he assumes Sonic is behind this scheme and he angrily follows the vehicle.