The Junk Robots were semi-sentient robots.
Description[]
Much more advanced creations than their comical designs let on, the Junk Robots were created by rogue supercomputer X - Y + 2 as his army. Splinter intelligences controlled by his will, the Junk Robots were created as glowing orbs of energy in X-Minus's underground base, then sent out into the surface world where they fashioned themselves a physical form out of human junk.
This was useful both for symbolism, as X-Minus, himself a piece of discarded techology, wished to have humanity see all its discarded junk fight back, and for stealth, as Junk Robots could disassembled their bodies at a moment's notice, appearing to be nothing more than a pile of clutter.
After Mickey Mouse took down X-Minus with a screwdriver in June 1967, the Junk Robots Army powered down and disassembled into their spare parts. The stray bits of X-Minus's intelligence were presumably reintegrated to him as he was repaired and redeemed.
Behind the scenes[]
The Junk Robots were only ever seen in the 1967 story The Case of the Sinister Robot.