Another theme could be the exploration of new powers or abilities. Maybe a character discovers a hidden power that was unlocked during the events of Phantom Planet, and the fanfiction delves into how they learn to control and use it. Also, there might be stories about the characters having to deal with the consequences of their actions during that final battle, like how they are perceived by the public or other characters.
One common theme is the aftermath of the events in Phantom Planet. Writers often explore how the characters' lives have changed and what new challenges they face.
A great fanfiction idea could be a time - travel story within the Danny Phantom Phantom Planet universe. Danny somehow gets sent back in time to before he became a half - ghost. He has to figure out how to get back to his own time while also dealing with the knowledge he has of the future. This could lead to some really interesting interactions with his past self, his family, and friends. And he might accidentally change things in the past that could have a huge impact on the future of the Phantom Planet.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions on various topics, including Phantom Planet. Just use the search function and type in 'Phantom Planet' to see what's available.
One idea could be exploring Danny's new role as a hero on a global scale. Maybe he has to deal with new threats that are attracted to his increased fame. Another could be delving into his relationships with his friends and family after the big events in Phantom Planet. For example, how does his relationship with Sam and Tucker change now that he's a more public hero?
One common theme could be exploration of new and strange cultures on the alien planet. Another might be the relationships that develop between humans and alien species, such as friendships or romances that are unique to the setting. However, it's important to note that adult fanfiction may also contain inappropriate content which we should avoid delving too deeply into in a general discussion.
In 'treasure planet fanfiction', the theme of self - discovery is quite prevalent. The characters often find out more about themselves as they face the challenges on the planet. Power and its abuse can also be a theme. There might be a character who finds a powerful artifact on Treasure Planet and is tempted to use it for the wrong reasons. And of course, the overarching theme of treasure - hunting remains, with different takes on what the real treasure could be, whether it's gold or something more intangible like knowledge or friendship.
A frequent theme is also survival. The planet might have harsh conditions, and the characters have to find ways to endure. For example, they could be dealing with strange weather or dangerous creatures. Additionally, the theme of self - discovery can be present. As the characters interact with the new environment of Planet Twilight, they learn more about themselves and their capabilities.
One common theme is the exploration of their relationship. Whether it's a friendship or a budding romance, it's often at the center of the story. For example, in many fanfictions, Danny tries to protect Paulina from ghosts, which shows his care for her.
A really interesting fanfiction might focus on the relationships between the characters in the 'after phantom planet' era. Maybe Danny and Valerie finally get together and they have to deal with the challenges of their relationship while still being part of the whole ghost - fighting, post - Phantom Planet chaos. Their different views on how to handle the new situation in Amity Park could create some interesting drama.
Some fanfictions play with the idea of alternate universes. In these stories, Madeleine might be in a different time period or have a different social status, but still be connected to the Phantom. The exploration of power dynamics between them is also a theme. Who has the power in their relationship? Is it the Phantom with his mysterious allure, or Madeleine with her own strength and agency?
Power dynamics is also a frequent theme. Given Danny's ghost powers and Dash's position as a jock or bully, fanfictions often explore how these power differences play out. It could be about Danny using his powers to stand up to Dash in new and unexpected ways, or about Dash coming to respect Danny's powers. There are also some fanfictions that focus on the theme of redemption, where Dash realizes his wrongdoings and tries to make amends.