Goku's reaction could be a mix of shock and happiness. On one hand, he never expected to actually meet his parents. On the other hand, he has always longed for a family connection. He might start asking them a million questions right away about their lives, Saiyan culture, and what it was like when he was born.
There could be a power - hungry being who wants to use Goku's mother for their own gain. When Goku tries to meet her, this being tries to stop him because they know that if Goku and his mother reunite, they will be able to oppose their evil plans together.
Well, it could be that Goku meets his mother in a dream world. Maybe she gives him some advice on how to become even stronger. She might share some long - forgotten family secrets with him too.
Well, one possible plot could be that Goku, while on a journey through space, stumbles upon a planet where his mother, Gine, has been living in hiding. She reveals to him secrets about his Saiyan heritage that he never knew before, like special powers passed down in their family line.
In this fanfiction, perhaps Goku finally gets to know about his family's past. His father might pass on some special Saiyan techniques or knowledge to him. And his mother could share some warm family stories that Goku has missed growing up.
Another possible main character could be the villain that forces the two Gokus to meet. This villain could be a new, super - powerful threat that the two Gokus need to deal with. Their meeting becomes a crucial part of the story to defeat this powerful foe.
At first, Goku might be a bit shocked. But then, his natural friendly and curious nature would take over. He'd be eager to learn about her, about his family. He could show her all his cool moves and tell her about his friends on Earth. And he'd be really happy to have a family connection that he's been missing all this time.
Well, it could be about Goku Jr learning some of Goku's most powerful moves. Maybe Goku teaches him the Kamehameha. They might also go on an adventure together, like fighting a new and powerful enemy that neither could face alone.