Tommy the Turtle

Tommy Turtle was a childhood friend of Sonic the Hedgehog and Sally Acorn. He later became a member of the Knothole Freedom Fighters. Tommy became a member of the brain trust along with Tails and Rotor, assisting with the planning and creation of inventions. Tommy became a pawn for Dr. Eggman Robotnik's "son" A.D.A.M. after coming into contact with the nanites. A.D.A.M. assumed control of Tommy and nearly succeeded in capturing all of the Chaos Emeralds in the universe. However, Tommy managed to temporarily resume control of his body and allowed the Egg Fleet to kill A.D.A.M. and himself