After Cindy's report at school that Jimmy can't beat the record of the great professor, Jimmy decided to look for someone to help him. He finds out that Evil Jimmy is the one who can help him. In the Earth's orbit, Evil Jimmy has hijacked a communication satellite and began to pull prank calls all over Retroville. Jimmy was able to stop him after a laser battle, and takes him to his lab. Jimmy created a device that can turn his evil clone into a good clone. Unfortunately, Jimmy (the evil one) cuts out one of the cords. Jimmy activates the machine, and the clone pretends to be good.
Jimmy (the evil one) gets the Hypno-ray, and began to wreak havoc. Jimmy was able to put everyone back to normal and finds out that his clone went to his lab, and gets the Quantum Duplicating Device, which creates a perfect copy of something but destroys the original in the process. Jimmy (the good one) chases the clone in the lab, who finds out that his rocket's engine was clogged with watermelon. Evil Jimmy has used the Duplicator to create an Evil Earth. Jimmy finds out that Evil Jimmy has planned to suck the real Earth into oblivion. Jimmy disguises himself as Evil Jimmy to infiltrate the evil Earth.
When Jimmy (the good one) went to Evil Jimmy's house, he was trapped by the clone. Jimmy was able to keep Evil Jimmy down to stop his plan. Unfortunately, Jimmy (the evil one) tore the dark chip from the duplicating machine to try to put Jimmy into oblivion. As evil Earth is sucked into a void, Jimmy (the good one) was able to escape, and thinks that doesn't need to beat the record. Just then, a big black cloud came from where the evil Earth had been, and Evil Jimmy's face appears as he makes an attempt to escape.