One popular 'King Danny Phantom' fanfiction might be the ones that explore Danny's newfound powers as a 'king' in different scenarios. For example, some could focus on how he rules the Ghost Zone and deals with various ghostly politics. Another type could be about his relationships with his friends and family while having this new regal status.
One popular 'Danny Phantom Danny Dies' fanfiction might be 'The Aftermath'. In this type of fanfiction, the story often explores how the other characters deal with Danny's death. For example, Sam and Tucker may go through a period of extreme grief and guilt, wondering if they could have done something to prevent it. Another could be 'A World Without Danny', where the entire Amity Park starts to change in unexpected ways due to Danny's absence, showing how much of an impact he had on the town.
One interesting Danny Phantom King fanfiction could be 'The Ascent of the Phantom King'. It might explore Danny's journey as he fully embraces his role as the king. Another could be 'Allies of the Phantom King' which focuses on the characters who stand by Danny in his new position. There's also 'Challenges of the Phantom King' that could detail the difficulties he faces in ruling the ghost realm.
One popular Sam and Danny Phantom fanfiction could be those that explore their relationship in more depth, like how they handle supernatural threats together in different scenarios. Another might be ones that focus on their friendship growing stronger over time as they face various challenges at school and in the ghost - fighting world.
One popular female Danny Phantom fanfiction could be those that explore a female version of Danny having different relationships with the other characters. For example, a story where she has a closer friendship with Sam and Tucker in a more female - centered narrative.
There are fanfictions where Danny's ghost powers are somehow connected to the demon - hunting world of Supernatural. Maybe his powers are seen as a new type of supernatural ability that the hunters in Supernatural are trying to understand. Some fanfictions explore how Danny would react to the more gritty and dangerous world of Supernatural, and how he could use his unique abilities to survive and help.
Some fanfictions might focus on Danny's role in the afterlife as a protector. He could be protecting other spirits or even trying to protect the living from a greater threat that exists in the ghost world. There could also be a theme of identity. Danny has to re - evaluate who he is now that he's dead. Is he still the same Danny, or has death changed him fundamentally? This exploration of self can make for really interesting stories.
One popular Danny Phantom Vlad abuse fanfiction might be 'The Haunting of Vlad'. It delves into the psychological abuse Danny faces from Vlad. In this story, the author explores how Danny copes with the constant threats and manipulation from Vlad. Another could be 'Vlad's Dark Intentions' which shows the extent of Vlad's abuse through his attempts to control Danny's powers for his own evil purposes.
One popular Danny Phantom weight gain fanfiction might be those that explore how his ghost powers are affected by the change in his body weight. For example, some might show him having to adjust his flying or intangibility abilities. Another could be about the reactions of his friends and family to his weight gain, like Sam and Tucker being concerned and trying to help him get back to his normal self in a healthy way.
Some 'Danny Phantom Bad Boy' fanfictions focus on Danny's relationships in this new 'bad boy' persona. He could be in a love triangle with characters who are either attracted to his new edginess or are put off by it. This adds an interesting layer of drama to the story and can make for some engaging reads.
There might be a fanfiction where 'Bad Vlad' teams up with other villains from the Danny Phantom universe. For example, he could form an alliance with some of the more powerful and evil ghosts to finally defeat Danny and rule both the human and ghost worlds. In this type of fanfiction, the story would focus on Danny's struggle to break up this alliance and save his town and the ghost zone.