Another storyline could involve a character from UQ Holder learning the secrets of Ultra Instinct from Goku. This would be a great way to blend the two universes' concepts. The UQ Holder character could struggle at first to understand and master it, leading to some comical and also tense moments as they train with Goku. Maybe they have to overcome some personal limitations in order to even begin to access the power of Ultra Instinct.
Evangeline and Goku. Evangeline is a powerful vampire in UQ Holder. Her dark magic and immortality contrasted with Goku's pure - hearted and extremely powerful fighting style would create some interesting dynamics. They could either be at odds, with Evangeline seeing Goku as a threat to her power, or they could end up teaming up in some strange circumstances where their combined powers are needed.
A possible plot is a crossover with the Naruto universe. Goku in Ultra Instinct mode could be mistaken for some sort of super - powered ninja. He might end up training with the Hokage or getting involved in the Akatsuki's plans. Since his Ultra Instinct gives him such incredible reflexes and power, he could easily hold his own against the strongest ninjas like Naruto in his Six Paths Sage Mode or Sasuke with his Rinnegan. It would be a clash of two very different power systems.
One idea could be a crossover with the Naruto universe. Goku with his Ultra Instinct could face off against Naruto in his strongest form. They might start as rivals but then realize they have a common enemy and team up. The story could explore how their different fighting styles and powers interact.
A cool uq holder crossover fanfiction idea would be with 'One Piece'. The UQ Holder crew could sail on the Grand Line, encounter the Straw Hat Pirates, and get involved in their adventures. They might have to deal with the various pirates, sea monsters, and the strange islands. Or a crossover with 'Fairy Tail'. The magic of both worlds could combine in interesting ways, like UQ Holder's time - based magic mixing with Fairy Tail's elemental magic.
Well, with Ultra Instinct, Goku would be able to react extremely quickly to the DC heroes' powers. For instance, when facing Flash, who is super fast, Goku in Ultra Instinct might be able to match his speed or even anticipate his moves better. This could lead to a mutual respect between them as they test each other's limits.
One possible storyline could be that Goku gets Ultra Instinct right when Frieza is about to kill all the Namekians. He then uses his newfound power to completely overpower Frieza and save the day. Another could be that he gets it during a battle with the Ginyu Force and easily defeats them all in one go.
First, understand the characters well. Know Goku's Ultra Instinct powers, his personality, his goals. Then, when choosing a crossover universe, pick one that has elements that can contrast or complement Goku's world. For example, if it's a magic - based universe, how would Goku's physical powers interact with magic? Keep the story focused on the main characters and their development throughout the crossover.
Maybe Goku gets mixed up in the events of the Injustice storyline. He could initially be confused by the alternate version of Superman who has gone bad. Goku, with his pure heart and Ultra Instinct, might try to bring the corrupted Superman back to the light. This could lead to some intense battles with the Injustice League as Goku tries to set things right.
Yes, it is possible. In fanfiction, writers have the creative freedom to reimagine the origin of characters. Goku being born with Ultra Instinct can add a whole new layer to his character development. It could mean that his power growth would be different from the original story, perhaps faster or with different challenges along the way.
You could write a fanfiction where Goku teaches others about Ultra Instinct. Maybe he tries to pass on this power to Gohan or Trunks. This would involve Goku having to understand the power more deeply himself in order to teach it, and it would also be a great way to develop the other characters.