Their relationship could also be explored in terms of family. Maybe they discover they are brothers through some magical or scientific mystery. Danny could bring a bit of chaos to the wizarding world with his non - traditional powers, while Harry could introduce Danny to the complex family trees and traditions in the wizarding world. And they would support each other through difficult times, like when Danny faces a powerful ghost or when Harry has to deal with the latest threat from the dark side.
Danny would probably be really curious about all the magic in Harry's world. He might ask a million questions and be eager to try out some spells. Harry, on the other hand, would be intrigued by Danny's ghost powers. They'd likely have a lot of fun showing off their abilities to each other.
One way the worlds of Danny Phantom and Harry Potter could collide in a fanfic is through a magical accident. Maybe a spell gone wrong in the wizarding world creates a portal that leads to Amity Park. Danny, being the hero he is, gets sucked into the wizarding world through this portal. There, he could discover his ghost powers have some strange interactions with magic. For example, his intangibility might interfere with certain spells or protective enchantments.
Their relationship could be portrayed as a partnership in parenting. Sam and Danny work together to teach their kids the values they believe in, whether it's about respecting all living beings (because of Danny's connection to the ghost world) or being true to oneself (which is something Sam has always been about). They also share the responsibilities of taking care of the household and making sure the kids are happy and healthy.
One great 'Danny Phantom' and 'Harry Potter' fanfic is 'The Phantom in Hogwarts'. It combines the unique ghost - fighting elements of Danny Phantom with the magical world of Harry Potter in an interesting way. The story follows Danny as he somehow gets transported to Hogwarts and has to deal with both the magical threats there and his own ghostly powers.
Their relationship can be portrayed as a father - son dynamic. Instead of the usual enmity, Vlad could be a strict but loving father figure to baby Danny. He might scold Danny when he does something wrong with his powers, but also be there to comfort him when he's scared.
One idea could be that they discover their brotherhood through some magical event that links their two very different worlds. Maybe a magical object from the Harry Potter universe shows up in Amity Park and Danny's investigation leads to the revelation that they are related.
In fanfic, their relationship can be less hostile. For example, Snape may not be as harsh with Harry in class as he was in the books. He could be more understanding of Harry's situation, especially considering Harry's role in the fight against Voldemort.
The fanfic could delve into their family history. Maybe there was a long - lost connection between their families that led to them being brothers. It could explore how this discovery affects their identities. Danny, who has always been a bit of an outcast in his own world, might find a new sense of belonging with Harry. And Harry, who has lost so many family members, could gain a new brother. There could be a lot of emotional moments as they navigate this new relationship while also dealing with the threats in their two worlds.
One creative plot is when Danny's ghostly powers are mistaken for a new type of magic in the Harry Potter universe. For example, in a fanfic, the Ministry of Magic tries to study Danny because they think he could be a powerful new magical being. This leads to all sorts of chaos as Danny just wants to go home and Harry tries to help him.
Their relationship could be portrayed as one of intense distrust. Harry, as the hero, would see Rodolphus as a symbol of the dark past. Rodolphus, on the other hand, might view Harry as the one who brought down his world. For example, in a fanfic, Harry could be interrogating Rodolphus in Azkaban and the air is thick with animosity.