Perhaps in the fanfiction, they team up to face a common enemy. This enemy could be someone who can manipulate both time and space, which would require Sonic's speed to reach different parts of the affected area quickly and Goku's raw power to deal with the strong attacks of the foe. They would have to learn to work together despite their differences.
One interesting idea could be the clash of their different power systems. Goku has his ki-based attacks and Super Saiyan forms, while Sonic has his speed and Chaos Emerald powers. Maybe they could have a friendly sparring match to test each other's abilities.
One idea could be a crossover where Sonic meets characters from other popular franchises in a fanfiction. For example, Sonic could meet Mario and they have to team up to save both their worlds from a common threat. Another idea is a time - travel fanfiction where Sonic goes back in time and meets his younger self, leading to some self - discovery and adventures. Also, a fanfiction about Sonic meeting a powerful new villain created by a fan could be really exciting.
In some versions, the female Goku could be part of a prophecy. The two Gokus meet, and at first, there is some confusion and misunderstanding. But as they get to know each other, they discover that they are key to fulfilling the prophecy. They combine their powers and defeat an ancient evil that was threatening both of their worlds.
A possible plot for 'sonic meets sonic boom fanfiction' is that a strange rift in the dimensions brings Sonic and his friends from the classic Sonic world into the Sonic Boom world right when they are about to have a big celebration. However, the Sonic Boom characters are initially suspicious of these new arrivals. But as they start to realize that a common enemy is behind the rift, they join forces. Sonic and Sonic Boom Sonic could have a friendly competition to see who can defeat the most badniks during the adventure, which also helps them bond and understand each other's strengths better.
One idea could be that Bendy and Sonic find themselves in a strange, in - between world where the art styles of their respective universes start to blend. They have to team up to find a way back to their own worlds. Maybe there are some glitches in this new world that they need to fix together.
One idea could be that Sonic from Sonic X accidentally travels to the Sonic Boom universe and has to adapt to the different environment and new versions of his friends. Maybe he teams up with Sonic Boom Sonic to defeat a common enemy that has found a way to cross between the two universes.
Maybe Gine meets Goku during a time when he is facing a great internal struggle. She offers him the motherly love and guidance he never had growing up. This could lead to Goku having a new sense of purpose and inner peace, which in turn affects his relationships with his friends and family on Earth.
Maybe in the fanfiction, Goku helps Videl discover a new power within herself. He trains her in his special way, and she becomes much stronger as a result. It could also involve some comical moments where Goku's naivete about normal life clashes with Videl's more down - to - earth personality.
One idea could be that Sonic and Mario have to team up to save both their worlds from a new, powerful villain who has the ability to manipulate time. This would force them to use their unique speed and jumping abilities in new and creative ways.
The exploration of new worlds is also common. As Sonic is from his own game - based world and Goku from the Dragon Ball universe, fanfiction writers often create new settings where both characters can interact. This could be a merged universe or a new dimension that they are transported to. These new worlds add an element of mystery and adventure to the stories.
In some 'Goku meets Goku fanfiction', they could team up against a super powerful enemy that neither could defeat alone. They would combine their signature moves like the Kamehameha for an ultimate attack.