This is a backstory of the one and only King Tuffle junior sama. Well, technically, he was mechanical organic parasite called Baby by the scientist Dr. Myuu, but he detested the degrading name. Instead of having a name making him feel connected to the original Tuffle King, "Baby" made him sound like a pathetic immature weakling. Sure, he would go off into a rage when things didn't go his way, but it was all for good reason in his eyes. In his short life, the only thing on his mind was revenge against the horrible colonizing Saiyan race who wiped out his people, the Tuffles, into extinction. Created from the DNA of the late Tuffle ruler, he was already active even before his official creation. At first, he existed as an advanced computer program, tasked with programming machine mutants to supply him with enough energy to take on physical form. One of the mutants was Dr. Myuu, a blue-skinned android with flaming orange hair and a beard. General Rilldo was another mutant, who ultimately failed in his mission.
Eventually, Baby had enough energy to escape from his containment tube and enact his plan. Knowing that his people would never return from the dead, he settled for the next best option. By changing his form from solid to liquid at will, he could enter into any living being via cuts on their bodies. Once inside the host's body, he would plant a mechanical egg infused with his genes into their bloodstream or sometimes into their brain. The egg would release strong chemical that would interfere with the nervous system of the host. Ordinary bodily control and thought would start to fade, causing excruciating pain to the victim at the sudden internal change. Like a puppet master, baby would gain complete control over his new host, while also gaining strength from their ki. Only sacred water on contact with the body, could destroy the chemicals and the egg, thus curing the victim. Since the nervous system controls muscles, movement, and thought, the victim would have no choice other than to submit to Baby's will. Interestingly enough, he could possess multiple individuals at the same time, like a deadly virus, thus creating a new Tuffle society of his own. He managed to possess most of the human population and many well-known individuals: Trunks, Gohan, Goten, Bulma, Chi-Chi, and Vegeta.
Baby's plan was nearly fulfilled when he was able to wish for his home world, Planet Plant to be restored and relocated next to earth thanks to the power of the red Shenron dragon. Transforming into a Golden Great Ape, Baby enjoyed creating fear in his enemies. Perhaps this was because he believed he could defeat the Saiyans, in the same way that the Saiyans had killed off his people many years ago. Ironically, he became the very being he so despised: a Saiyan, albeit in another form. Unfortunately, Son Goku, a heroic Saiyan in Super Saiyan 4 form, was able to defeat him in combat, slicing off his golden tail. Without any room to fit in Vegeta's shrinking form, Baby was forced to exit his host and flee. While making his escape in a spaceship, he was soon blasted into the sun, by Goku's kameameha attack, resulting in his violent death.