After explaining the training requirements for Super Saiyan 6 to the three of them, Son Goku asked everyone, "How did you all end up here? And how did you get to know Whis and Lord Beerus?"
Trunks said, "Uncle Goku, after I came back from your world, I spent three years pushing Super Saiyan 4 to its limit. My aura reached the Sacred World of the Kai and the God of Destruction Realm. That's how I met Lord Beerus, Whis, and the Supreme Kai."
Son Goku nodded. "Then how did you achieve Super Saiyan 5?"
Trunks smiled. "Once I pushed Super Saiyan 4 to its limit, I somehow sensed the threshold of Super Saiyan 5. After two and a half years of intense training, I finally broke through the Super Saiyan 4 bottleneck and transformed into Super Saiyan 5."
"Oh, I see. Well done, Trunks. All the guidance I gave you didn't go to waste," Son Goku said with a smile.
Trunks was delighted to hear that.
Son Goku went on to ask, "Then why did you all gather here?"
Beerus said, "I brought them together."
"Oh? Why is that, Lord Beerus?" Son Goku asked, puzzled.
Beerus said, "Champa made a bet with me. Each of our universes will choose five people to compete. If he wins, he gets Earth. If I win, he'll give me the wish-granting orbs he's collected. That's why I brought them together."
"Oh, I see. Doesn't that mean Lord Champa is bound to lose?" Son Goku said.
Beerus asked, "What makes you say that? What are you basing that on?"
Son Goku smiled. "As far as I know, in my world, Lord Champa's universe is short on talent. There are hardly any strong fighters there. He even poached Vegeta to serve as his universe's God