Robo-Dexo 3000 is an advanced giant fighting robot Dexter created to replace the older Robo-Dexo 2000. Upon its test on a giant asteroid headed for Earth, this pinnacle of robotics, courtesy of the boy genius, was proven to be far superior than its 2000 model - however, it developed sentience too quickly and, consequently, met its fate at the hands of the Energy Thief.