Gohan's power of transformation could be affected. Instead of turning Super Saiyan in the normal way, it could be related to the haki system in One Piece. Maybe his Super Saiyan form gives him a special type of haki that is unique and extremely powerful.
A Mystic Gohan crossover fanfiction could involve the world of One Piece. Gohan could land on the Grand Line and join a pirate crew. He'd have to adapt to the strange new world full of devil fruits and sea kings. His powers would be a great asset, but he'd also have to learn about the different cultures and ways of the pirates. Or, he could cross over into the world of Harry Potter. Gohan at Hogwarts would be a unique concept. He could use his powers to protect the school from dark wizards while also learning about magic.
Well, I'm not entirely sure of a specific 'Mystic Gohan lemon fanfiction' title off the top of my head. But generally, in these types of fanfictions, they might play with Gohan's transformation into Mystic Gohan and add a romantic or more adult - themed relationship. It could involve his relationships with existing characters from the Dragon Ball series like Videl, or it could introduce new characters. To find good ones, you can also check out fanfiction communities where people discuss and recommend their favorite stories.
First, decide which universe you want to cross Mystic Gohan with. Then, research that universe to understand its rules, characters, and overall vibe. Next, think of a good reason for Gohan to end up in that new universe. It could be a magical accident, a portal opening, or some other device. After that, start planning the main conflict or story arc. For example, if it's a crossover with the Star Wars universe, maybe Gohan has to help the Rebels fight the Empire. Then just start writing, introducing Gohan into the new setting and seeing how he interacts with the new characters.
Their friendship could start with mutual respect for each other's power. When they first meet, they might have a small sparring match and be impressed by the other's skills. This would lead to them sharing training techniques.
Gohan's powers would be quite unique in the Marvel Universe. His Super Saiyan forms would give him a massive boost in power, far beyond what most normal Marvel characters can achieve without some sort of external boost. His Zenkai boosts, which increase his power after near - death experiences, could also be an interesting concept to introduce. And his martial arts skills, combined with his Saiyan instincts, would make him a very adaptable fighter against the various threats in the Marvel world. He could also potentially teach other heroes his fighting techniques.
First, know the character of Mystic Gohan well. Study his personality, powers, and relationships in the original Dragon Ball series. Then, for the lemon aspect, be careful as it should be tasteful and not overly vulgar. You can start with a plot idea, like Gohan using his Mystic powers in a new and unexpected situation that leads to a romantic encounter.
One plot idea could be that Mystic Gohan and Naruto are brought together by some sort of interdimensional rift. They have to team up to close the rift while also dealing with enemies from both of their worlds. Another idea is that they meet in a tournament held in a neutral dimension. They start as rivals but then realize they can learn from each other's fighting styles.
Gohan's ki - based powers and Naruto's chakra - based powers could potentially interact in an interesting way. For example, Gohan's energy blasts might be enhanced by Naruto's chakra control, making them more precise and powerful. On the other hand, Naruto could use Gohan's ability to sense ki to detect hidden enemies or sense incoming attacks better. Maybe Naruto could even learn to use ki in addition to chakra by observing Gohan.
Gohan's powers would probably be seen as extremely strange and almost magical to the ponies. His ability to fly without wings, shoot energy blasts, and his super - strength would be beyond their comprehension. They might initially be frightened of him, thinking he's some kind of dangerous being. But once they see he's there to help, they would be in awe of his powers and see him as a powerful ally.