Well, one unique aspect is the combination of different power scales. For example, when Goku crosses with a character from a less powerful universe, it shows how his god - like powers can completely disrupt the balance. It's like a fish out of water situation but in a power - level sense.
One possible interesting plot could be Goku, in his godlike form, being transported to different universes where he meets various female characters from different shows or stories. He then has to form alliances with them to fight a common evil. As they spend time together, romantic feelings start to develop among them, creating a harem dynamic.
One popular 'godlike goku crossover fanfiction' is the one where he crosses over with Superman. In this story, they have an epic battle to test each other's limits. Their powers are so different yet equally formidable, making for an exciting read.
In some dark godlike Goku fanfictions, the story might explore how the other characters react to this new version of Goku. His friends like Vegeta and Piccolo would likely be shocked and conflicted. Vegeta, who has always had a competitive relationship with Goku, might see this as a new level of power he needs to reach or oppose. Piccolo, being more level - headed, might try to figure out a way to bring Goku back to his old self.
A being from a parallel Dragon Ball universe where the power levels are exponentially higher. This enemy would have a completely different set of techniques and abilities. For example, they could control the very concept of energy, not just ki, which would force Goku to adapt his fighting style in ways he's never had to before.
Another popular character is Beerus. Since he is a powerful god in the Dragon Ball universe, when paired with Godlike Goku, it can lead to some really interesting power dynamics. They could have battles that shake the very fabric of the universe or team up to deal with an emerging evil that threatens the balance of all the realms.
Bulma could be one. She already has a long - standing relationship with Goku in the original series. Another could be Sailor Moon. Her strong sense of justice and powerful abilities would make for an interesting addition. Also, Mikasa from Attack on Titan with her combat skills and loyalty could be part of the harem.
Goku's godlike power might make his time travel more precise. Normal time travel in the Dragon Ball universe can be a bit haphazard, but with his godly energy, he could target specific moments more accurately. For instance, he could arrive at the exact second he wants to in the past or future.
One common theme is the struggle for power. Goku, in his dark godlike form, may be constantly seeking more power, which can lead to battles with other powerful beings in the Dragon Ball universe. Another theme is the corruption of the hero. It shows how even someone as good - natured as Goku can be swayed by power and lose his way.
A 'godlike Madara' in a crossover fanfiction could be really interesting. It might involve Madara from Naruto being given 'godlike' powers and then being crossed over into another universe, like a different anime or even a fictional world from a game. This could lead to some really epic battles and unique storylines.