Some fanfictions might explore an alternate universe where Bulma and Goku are the only ones left with their powers intact after a great battle. They have to rely on each other completely and in the process, their bond deepens into a romantic one. This could involve them building a new world together and facing all kinds of difficulties as a couple.
One interesting fanfiction could be where Bulma and Goku have to team up to save the world in a unique way that wasn't shown in the original series. Maybe they have to travel to a different dimension together and face new enemies.
One interesting story could be where Goku and Bulma go on an adventure together to find a new Dragon Ball. In this fanfiction, they face many challenges and along the way, they start to realize their feelings for each other are deeper than just friendship. It shows a different side of their relationship compared to the original series.
In such fanfiction, it could lead to a completely different power dynamic and relationship among the characters.
One interesting story could be about Bulma and Chichi teaming up to save the Dragon Ball world from a new, unexpected threat. They use their unique skills and knowledge, Bulma with her technological genius and Chichi with her martial arts training and motherly determination.
I really like 'Goku and Bulma's Unexpected Journey'. It has a great plot where they are thrown into a parallel dimension. There, they have to rely on each other more than ever. The author does a wonderful job of exploring their characters and how they interact in this new and strange situation.
In some fanfics, Goku and Android 18 could start as rivals but gradually develop a mutual respect and then an unexpected friendship. This could lead to them training together and learning from each other's fighting styles. For example, Goku could teach 18 some of his Saiyan techniques, and 18 could show Goku her precise and calculated combat moves.
There are fanfictions where Bulma and Goku are sent back in time accidentally. In this scenario, they have to figure out how to get back to their own time while also dealing with the primitive conditions of the past. It could involve Goku having to hold back his power so as not to disrupt the timeline too much, and Bulma using her wits to survive. This type of story often has a lot of character development as they face challenges they've never had to before.
You can try fanfiction.net. It has a large collection of Dragon Ball Z fanfictions, and you're likely to find some great Bulma x Goku ones there.
One possible plot could be Goku and Turles forced to team up against a new, powerful enemy. Maybe a villain from another dimension that threatens both their home planets. This would force them to put aside their differences and combine their unique fighting styles.
Well, one interesting aspect could be the exploration of an alternate relationship dynamic. Since Goku and Bulma have a long - standing friendship in the original series, seeing it take a different turn in fanfiction can be fascinating. It might also include unique interpretations of their personalities and how they interact in a more romantic or complex way.
One interesting story could be about Black Goku's origin in a different universe where his transformation into an evil Saiyan had a more complex backstory involving a corrupted wish on the Dragon Balls. It might explore how his actions in that universe led to him crossing over into the main Dragon Ball Z universe.