How Dragon Ball's Worst Fighter Actually Saved Trunks And Goten
Even though Goten and Trunks are two of the strongest fighters in Dragon Ball, they still need help from the worst fighters DBZ has ever seen.

There's no shortage of fighters in the Dragon Ball universe, but one of them easily earns the title of absolute worst (even if everyone thinks he's the best) - but even if this fighter in question is a complete liar, he actually helped save DBZ The lives of two of the greatest fighters: Goten and Trunks.
Goten is the second son of Goku and Chi-Chi, and Trunks is the eldest son of Vegeta and Bulma. Both are of half-human, half-Saiyan descent, and both display incredibly high power levels. Even before the age of ten, Goten and Trunks were able to easily become Super Saiyans - something that shocked even Vegeta. With their insane power levels at such a young age, it only makes sense that they'd be called upon to fight Majin Buu during the villain's global attack. Yet two of the world's mightiest fighters still seem to need the help of arguably the poorest human being to survive - and that fighter is none other than Mr. Satan.
In Akira Toriyama's Dragon Ball episode 482, Goten and Trunks train with Piccolo at the Observatory, trying to master the fusion dance. exist At this point in the Buu Saga, Goku and Vegeta are dead, and Gohan is presumed dead, so the only remaining fighters who can face Buu are Goten and Trunks. Fortunately for the world, these young fighters are formidable -- both for their age and in general. However, powerful or not, neither has a chance against Buu unless they perfect the fusion dance and become Gotenks - specifically, Gotenks who are brought to life while Goten and Trunks are in Super Saiyan form. When these two warriors accomplished this impressive feat, they decided to take their newfound fusion power out for a test drive, only to waste all their time. The fusion via fusion dance only lasted thirty minutes, and Gotenks basically spent all of that time showing off. However, that didn't stop Gotenks from flying up to Majin Buu to challenge him on the spot, no matter how much time was left in their fusion - which is where Gotenks ran into trouble.
Mr. Satan Distracted Buu from Goten and Trunks

As soon as Gotenks arrives at Buu's house, the combined warriors immediately split, and Goten and Trunks revert to their original selves. Knowing they have no chance against Buu on the outside After becoming Gotenks, the two quickly flew back to the lookout to regroup. While they don't think they alerted Buu, it's revealed that the villain heard someone talking outside and even went outside to investigate. Luckily, Mister Satan was with Buu at the time and told him what he heard was only in his head, and convinced Buu to go back inside. Mister Satan dispels Buu's suspicions until Buu himself is convinced no one is there. But what if Mr. Satan isn't there?
If Mister Satan wasn't with Buu and didn't convince him to go back indoors after Goten and Trunks' visit, it's likely that Buu followed his instincts to investigate what he "thought" he heard. If he did, then Buu would grab Goten and Trunks (given his huge power level advantage) and then he would most likely kill them since he kills pretty much everything else on Earth . That means, no matter how improbable it sounds, arguably the worst fighter in Dragon Ball history--Mr. Satan - actually saved Goten and Trunks.