One of the common themes is friendship. In many crossovers, like when Goku goes into the Digimon world, he forms new friendships with the Digimon and their human partners. His pure - hearted nature helps him connect with them. Also, the theme of self - discovery is present. In a crossover with the Final Fantasy world, Goku has to learn about the new magic and technology there, which makes him discover new aspects of himself and his abilities.
Adventure is a prevalent theme in mui goku crossover fanfiction. Whether he's in the world of Inuyasha or the Teen Titans universe, Goku is always up for a new adventure. He jumps into battles and quests without hesitation. Another common theme is the exploration of different power - up systems. When he crosses into the Dragon Ball GT world (even though it's still part of the Dragon Ball franchise but with different concepts), his understanding of the Super Saiyan 4 form and how it compares to his Ultra Instinct form can be an interesting exploration in the fanfiction.
Power comparison is a common theme. For example, when Goku crosses into the Marvel universe, fans often like to see how his Saiyan powers stack up against the likes of Thor or Hulk. Another theme is culture clash. When Goku enters a different fictional world like the world of Bleach, his Saiyan values and the way of life in Soul Society are very different, and this contrast is explored in the fanfiction.
One popular mui goku crossover fanfiction is 'Goku in the My Hero Academia World'. It's really interesting as it shows Goku trying to adapt to the quirks - based society. Another one could be 'Goku Meets the Avengers'. Here, Goku's raw power clashes with the high - tech and superpowered heroes of the Avengers, creating some really exciting fight scenes.
One common theme is power struggles. Since Black Goku is a very powerful character, when he crosses over, there are often battles to determine who is the strongest in the new combined universe.
One common theme is the clash of different cultures. Since Goku is from a very different world, when he's in a crossover romance, his Saiyan culture often clashes with the other character's world. For example, his straightforwardness in expressing emotions might be different from the more reserved nature of some other characters.
Goku MUI in the manga represents a peak in his power and has a major impact on the story's direction. It introduces new dynamics and showcases the extent of his growth as a fighter.
A prevalent theme is self - discovery. The female oc often discovers new things about herself while being with Mui in the Naruto world. Also, the theme of loyalty is common. They might have to prove their loyalty to each other in the face of various threats and challenges. For example, in some fanfictions, they have to stand by each other against powerful villains. And the exploration of different jutsu and ninja skills in relation to their relationship is also a theme. The female oc might have a special jutsu that complements Mui's abilities or they might learn new skills together.
A common theme is training. Since Goku is a master of martial arts, many fanfictions focus on him training Caulifla, like in 'Training Days'. It could be about her learning new forms or just improving her basic skills.
One common theme is power - up. The OC usually has some sort of unique power or ability that they either learn to control better or gain more of with Goku's help. For example, in many fanfictions, the OC might start with a weak power but end up becoming really strong like Goku.
The theme of legacy is quite common. Goku is a legendary figure, and in fanfiction, his legacy - what he leaves behind for future generations - is often explored. Also, the theme of redemption can be found. Maybe Goku made a mistake in the fanfiction's plot, and he has to redeem himself. And the concept of the hero's journey is also there. Goku's path as a hero, with its challenges, growth, and revelations, is a recurring theme in serious Goku fanfiction.
Love and family are very common themes. Since they are husband and wife and have a son, many fanfictions explore how they deal with family life together.
One common theme is the exploration of Goku's vulnerability. Usually, he's seen as this super - strong character, so when he's hurt, it shows a different side of him. Another theme is the bond between him and his friends and family. They often come together to help him when he's injured.