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First working at Gemkat Labs then Megakat University Greenbox’s career has been filled with technological catastrophe. His first invention, the Gemkat 6000malfunctioned and transformed inmate Rex Shard into a giant Crystal monster. Greenbox corrected for the error by modifying the same device to reverse the effects. Later Greenbox created the Micro-Brain Repair Unit, which could fix any kind of broken technology. It later gained sentience and assimilated all things made of metal, gaining an appetite for world domination in the process. Out of sheer recognition for what his genius had created, Greenbox turned on the forces of good and merged with his machine. Later defeated Greenbox was turned over the Enforcers where his fate is uncertain.