Tony Stark aka Iron Man is a billionaire who uses a powered suit of armor to protect the world with the Avengers. He is one of the heroes that lost their powers due to Heinz Doofenshmirtz's Power-Drain-inator. In Iron Man's case, his suit was frozen, and since no one was able to carry him, the other heroes went to get a dolly. He along with the rest of the heroes later go to Phineas and Ferb for help. Because of a mix-up caused by Candace when Phineas and Ferb were trying to give the heroes substitute powers, he temporarily gets powers designed for Thor but, to his dismay, cannot wield Mjolnir because he's not worthy and the powers he received don't work without it.
The Iron Man suit has robot-like red and gold armor with blue eyes. The suit has repulsors in it's gloves and boots that allow it's user to fly and fight. Stark also has an arc reactor, a blue circular device that keeps his heart beating, implanted in his chest.