Do We Have This, Needs A Better Description, and Rolling Updates in effect.

The mechanical equivalent of cloning, a Robot Double is a handy way of making copies of yourself (or anyone else) when the real McCoy isn't available. No need for any of that biological gunk -- just get some time in the metal shop, apply a little Phlebonium, and you're all set!

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Examples:

• Dr. Doom has an army of Doombots that serve as both cannon fodder and robot doubles. Many a hero fighting Doom has been left wondering if he fought the original or a double.
• The Star Trek episode "I, Mudd" has Con Man Harry Mudd as the emperor of a population of (attractively female) robot doubles.
• Bill And Ted's Bogus Journey has the characters killed by their evil robot doubles from the future. They fight back with "good robot usses" built from parts at a hardware store.
• The Stepford Wives is all about this.