The Legend of the Strongest Saiyan

After the Tournament of Power, Xie Yi thought that the Dragon Ball world would be peaceful for a long time. Even if there were still enemies, he thought that even if Moro and other original bosses appeared, they wouldn't pose much of a threat to Goku and the others. After all, the strongest original boss, Frieza, had already reached a form above Black Gold. So, feeling relieved, he returned to the Mythical World, which he hadn't been back to for a long time, on Bai Yuanxin's advice. A year later, not long after his daughter was born, the system sent him the final mission: to go to the four-planet space-time of Proof of Courage.

"Aren't we going to stay a little longer?" Yuan asked Xie Yi, holding his baby niece who was only a few months old.

"I've been a guest here for a year now, it's time for me to leave. I have other things to do." Xie Yi: "Recently, I've seen the rapid development of Blue Star, and I've also kindly advised most of the planets in the Milky Way outside our solar system to acquire their technology. I believe that Blue Star will soon become the strongest in the Milky Way."

“Little brother, your brother also has important things to do. We’ll come find you again after we’re done. And next time I come, I must help you find a wife. It’s been over ten or twenty years since we last met, and you’re still a bachelor.” Bai Yuanxin said to Yuan, who was feeling quite disappointed.

Yuan awkwardly scratched her head and said, "This is something I can't rush. I'm too busy. I have to travel across countless planets. Getting married and having children will take time."

"Don't put too much pressure on yourself." Xie Yi stood up and patted Yuan's shoulder encouragingly: "There are some capable newcomers on Blue Star now, so you don't have to take on everything yourself."

Xie Yi took his daughter Bai Xinhan from him. "We'll leave now. I'll come back to see you after I finish my last mission, and I'll also help you find out why the old things appeared decades ago, and the origin of their existence."

As Xie Tian followed his parents into the time tunnel, he looked at the young man, waved, and said, "Keep it up, Uncle, we'll be back soon."

(Let's call the movie timeline of Prove Courage the Son Goku Jr. timeline for now. The younger Goku and Vegeta in it will have "JR" added to their names for easy distinction.)

[The Jr. timeline is set after Goku Jr. and Vegeta Jr.'s sparring match at the end of the World Martial Arts Tournament. Pan, having discovered her grandson's potential and due to her advanced age, brought the two to Kame-no-Shina Island for Master Roshi to train them.]

Inside the time tunnel, Xie Yi was still communicating with the system: "Why is this the last mission? Does this mean my evolution can only reach Super Saiyan 7?"

Little Loli System: "Host, I have recovered some of my missing memories. It seems that I was not born, but created by humans. My ability limit is to make a host reach the level of Super Saiyan 7. As for why it can only go this far, I don't know yet, but I can fully feel that I will be able to recover all my memories from birth to the present day soon."

"What will happen if you fulfill your responsibilities?"

The little girl in Xie Yi's consciousness shook her head: "I don't know, I can only wait for my memories to return. Also, although I didn't see clearly who created me, I clearly heard that his voice sounded a lot like yours."

Xie Yi feigned surprise upon hearing this: "You don't think I created you, do you? If that were true, I wouldn't have let you give me a reward with a trial card."

The two chatted for a while before arriving at the final mission's timeline, the four planets where courage was proven, known as the Jr timeline.

As soon as Xie Yi, Xie Tian, ​​Bai Yuanxin, and Bai Xinhan appeared at Master Roshi's house, Goku Jr. and Vegeta Jr. sensed their ki. Having trained with Master Roshi for a year, their mastery of ki might not even be as good as Krillin's back then, but it was still decent, as they at least had some thin Saiyan blood.

"Dad, someone's coming." Xie Tian sensed the ki released by Sun Wukong Jr. and Vegeta Jr. using the Flying Technique as they moved: "But their ki is very weak, even weaker than Uncle Yamcha in our timeline."

"Without a doubt, the era we are in right now is the hundredth year after your Uncle Wukong defeated the evil dragon. Time flies, and many old friends have passed away. Those who come here now must be one of the great-great-grandchildren of Sun Wukong... As for how many generations have passed, we have no way of knowing." Xie Yi's words were evasive and his explanation was vague and incoherent.

Within minutes, Goku Jr. and Vegeta Jr. arrived like lightning, appearing before everyone. Xie Yi hadn't used the power level detector for a long time, but this time, out of curiosity, he wanted to see just how weak these two were, so he decided to give it a try. However, when he saw the test results, his face instantly turned extremely ugly, even slightly distorted.

Sun Wukong Jr.'s normal level: 50

Master Transformation: Super Saiyan 1

Vegeta Jr.'s normal level: 52

Mastering the transformation into a Super Saiyan 1

"This is truly astonishing! Imagine what Vegeta would think if he saw his descendants so weak. Perhaps he would stare wide-eyed in disbelief, or perhaps he would tremble with rage, berating his descendants for their incompetence." Xie Yi added thoughtfully, "However, on the other hand, although they are weaker, they are still a little stronger than Goku's descendants. Thinking about it this way, Vegeta might feel somewhat comforted, perhaps even secretly relieved, and use this method to console himself."