They could have the same basic build. Danny Phantom is usually shown as a teenage boy with a certain physique, and Dan in the fanfiction might be described in a similar way.
Often in fanfiction, the author tries to keep some visual consistency with the original character. So for Dan, his appearance might mirror Danny Phantom in many ways. Their skin tone could be the same, and any unique markings or features that Danny Phantom has, like a birthmark or a scar in some interpretations, might also be present on Dan in the fanfiction. This is done to make the connection between the two more obvious and to appeal to fans of the original Danny Phantom character.
Obviously, Danny Phantom and Dan Phantom are the main characters. Danny is the original form, a heroic character, and Dan is his more evil and powerful transformation.
Obviously, Danny and Dan themselves are very popular. Danny as the main hero and Dan as his dark and complex counterpart are central to many stories. Jazz, Danny's sister, is also popular as she can provide a different perspective and often gets involved in Danny's ghost - fighting adventures in fanfiction.
Well, in some fanfictions, there are concepts like redemption arcs for Dan Phantom. It's fascinating to see how writers try to redeem such an evil character. Also, the idea of Danny using Dan's power for good in some unique situations. For example, there could be a story where Danny has to borrow Dan's strength temporarily to defeat a powerful ghost that he couldn't handle on his own.
Maddie is often depicted as a significant character. She might be a family member or someone closely involved with the main characters. But鍏蜂綋鐨勫叧绯 depends on the specific fanfiction.
Well, they might share some physical characteristics. Maybe in the fanfiction, Dan has the same white hair or green eyes as Danny Phantom. Also, their powers could be depicted in a similar way, like the ability to go intangible or fly.
In Danny Phantom fanfiction, heat might affect Danny in various ways. For example, his ghost powers could be weakened as some fanfics might play with the idea that extreme conditions like heat disrupt the balance of his human - ghost hybrid state. It could also make it harder for him to stay invisible or intangible as his energy is being sapped by the heat.
Danny's relationships change drastically. He distances himself from his friends and family. He no longer values their opinions or support. Instead, he might see them as obstacles or even threats. His friendships with Sam and Tucker are strained as he starts to engage in activities that they find morally wrong, like using excessive force on other ghosts or humans who get in his way.
Obviously, Danny Phantom is the main character as it's about his transformation into Dan. His friends like Sam and Tucker would also be important characters. They would likely play a role in trying to either stop the transformation or help Danny deal with the consequences. And of course, his ghostly foes might also be involved, as they could either take advantage of his situation or be affected by the power shift if he becomes Dan.
His personality might become more innocent. As a kid, he's not as cynical as when he was a teen. He might be more open - minded and trusting.
The original Danny Phantom story mainly focuses on his ghost - fighting adventures and his struggle to balance his normal life and his superhero identity. In contrast, the diaper fanfiction adds an entirely new and rather odd element. It takes the story in a direction that the original never did, focusing on situations related to the diaper which are not part of the core themes of the original.