In a crossover with the Dragon Ball universe itself, Broly would be an interesting character to pair with an overpowered Gohan. Their battles would be intense and epic, with both having incredible strength. They could also end up having to team up against a new, even more powerful threat.
Piccolo could be an interesting crossover character. He could be from a world where lemons have some sort of magical or spiritual significance. His relationship with Gohan in the original story would add depth to their interactions in this crossover. For example, Piccolo might be initially skeptical of the lemon - related things but eventually see their value when it comes to helping Gohan.
Definitely Superman. Superman's super strength and Gohan's Saiyan power would make for an interesting combination. They could have a friendly sparring match to test their limits. Another good character could be Ichigo from Bleach. Ichigo's sword - fighting skills combined with Gohan's martial arts and ki blasts would create some epic battle scenes.
Well, in the context of 'Immortal Gohan Crossover Fanfiction', Trunks could be a great crossover character. They could travel to different dimensions together. Android 18 might also be good. Her strength and Gohan's immortality could lead to some unique storylines. Also, Cell, if he was somehow reformed in the crossover, could create a really complex and interesting dynamic with Gohan.
In a crossover with the DC Universe, Darkseid would be a great antagonist. His immense power and his desire for universal domination would put him at odds with Ultimate Gohan who stands for justice and protecting the innocent.
A third idea is a crossover with the DC universe. Gohan could team up with Superman. Their combined strength would be off - the - charts. They could face off against powerful villains like Darkseid. Gohan's Saiyan fighting instincts combined with Superman's moral compass would make for an interesting dynamic, and they'd surely learn a lot from each other.
A common pairing is Gohan and Bulma. Their relationship in fanfiction can be interesting as they are both highly intelligent in different ways. Bulma's scientific knowledge and Gohan's martial arts and Saiyan abilities can create a dynamic where they complement each other well.
In a crossover with the Avengers, Iron Man could be an ally. His high - tech gadgets combined with Gohan's power would be a great team. Also in the Pokémon world, Ash could be an ally. Ash's knowledge of Pokémon and Gohan's combat skills could be useful. In the Bleach universe, Ichigo could be a strong ally for Gohan, with their combined sword - fighting and energy - blasting abilities.
Superman from the DC universe. Superman stands for truth, justice, and the American way, but his methods are often more lenient compared to Akainu. The two could have a philosophical debate about justice while also having to fight a common enemy.
If it's a crossover with the One Piece world, Blackbeard could be a potential bad guy. His ability to steal Devil Fruit powers and his ambition to become Pirate King could lead to a clash with Gohan. Gohan's pure - hearted nature would be in opposition to Blackbeard's more devious ways, and their battle could be epic, with Gohan's ki powers against Blackbeard's dark powers.
Bulma could be one. She's a well - known character from Dragon Ball. In a harem - like scenario, her intelligence and resourcefulness could add an interesting dynamic to the relationship with Gohan. Also, characters from other animes like Asuna from Sword Art Online might be included. Her sword - fighting skills and kind heart could contrast and complement Gohan's powers.