Vegeta, Bulma, and Trunks attend a science competition that is hosted by Mr. Satan with Goku hired for security, Dr. Senbei Norimaki of Penguin Village winding the award for his Reality Machine that conjures any item the user can think of. But the ceremony is interrupted by the ghost of Dr. Norimaki's nemesis Dr. Mashirito, who used a chemical called Playtime-X to increase the hyperactive tendencies of Norimaki's powerful robot daughter Arale Norimaki to destructive levels...