The Supreme Commander is actually the Hearing Aid's long-lost twin brother in a smaller icebox within a giant icebox, which is his suit. His "disguise" is bigger than all the other appliances, and the Supreme Commander uses it to rule Mars, which he once moved to. He is only Supreme Commander due to electing himself as such and being inside a giant refrigerator that is his assistant.
He (secretly) despises human beings due to their abusive nature. He also states that the Wonder Luxe Appliances (his henchmen) was built just to fall apart, making them obsolete. However, a gentle touch from Robbie (the Little Master), causes him to turn inexplicably pink and smile at the child, as it made him remember something about humans in which they are not all bad, but then reverts to his original color and pushes Robbie aside.
However, he secretly reforms after the election between him and Toaster for Supreme Commander and reveals himself to be the Hearing Aid's long-lost twin brother. After being reunited with the Hearing Aid, the ex-Supreme Commander travels back to Earth with Tinselina, Toaster, and his companions, but not before deactivating the Missile which was set to destroy Earth when he was in charge. Although Toaster took him to deactivate it and were both later rescued.
- The movie strongly implies that Supreme Commander came to hate humans after he was acquired by a Nazi scientist - after Supreme Commander talks to his brother, he says that after Albert Einstein left his house in a hurry he was found by the "notorious Doctor Von Gaigefonken" who was always listening to "talks about bombs, missiles, and warheads".