Superman can also be quite popular in these fanfictions. His strong moral code and incredible powers create an interesting dynamic when paired with Danny. They might have different approaches to handling threats, which can lead to some great character interactions.
Danny Phantom himself is obviously very popular as he is the main character from his own series. His ghost - fighting abilities and his dual identity make him an interesting addition to the Justice League universe.
I think it could be Superman. Superman is all about truth and justice and he would likely see the good in Danny. Also, they both have super strength in a way. Danny has his ghostly strength and Superman has his Kryptonian strength. They could bond over protecting the innocent.
Obviously, Danny Phantom is one of the main characters as the title implies he's the one doing the pranking. And then, members of the Justice League like Superman, Batman, Wonder Woman, Flash, etc. would be the ones being pranked.
The characters interact in various ways. Danny could be called upon by the Justice League to deal with a particular threat that has a connection to the Ghost Zone. He would then have to work alongside heroes like Superman or Batman. Superman might be curious about Danny's powers, as they are so different from his own. Batman, of course, would be analyzing Danny's abilities and trying to find any potential weaknesses. Danny's enemies from his own series could also be involved, and the Justice League would have to learn how to deal with these new types of foes.
Danny Phantom is for sure the main character on the saving side. On the Justice League side, all the classic members would probably be there. Superman, being the symbol of hope and having super strength, heat vision etc. Batman, the Dark Knight with his gadgets and detective skills. Wonder Woman with her Lasso of Truth and superhuman strength. The Flash, who can move at incredible speeds. Green Lantern, who can create constructs with his power ring. And Martian Manhunter, with his shape - shifting and telepathic abilities. They all could be in danger and Danny would have to figure out how to save each of them based on their unique powers and vulnerabilities.
I'm not entirely sure as I haven't read this specific fanfiction. It could be about a disrupted or alternative version of a story where Danny Phantom interacts with the Justice League in some unexpected or 'broken' way.
One common theme is the clash of two different worlds. Danny comes from a world where ghosts are a big part of his life, and the Justice League is from a more traditional superhero world. So there's often a theme of how they deal with each other's differences.
Danny could use his ghostly powers to disrupt the technology that some Justice League members rely on. For example, he could mess with Cyborg's systems. His ability to overshadow people might also be a key factor, allowing him to control some of the less - powerful members.
In such a crossover, Danny could team up with Superman. Danny's ghost powers would be really interesting combined with Superman's super strength. Maybe they'd fight a common enemy that has powers related to both the supernatural and advanced technology.
In a 'danny phantom vs justice league' fanfiction, Danny could use his ghost powers to surprise the Justice League members. His intangibility and invisibility might give him an edge at first. Maybe he'd startle Superman by suddenly phasing through a wall. However, the Justice League has a vast array of powers and skills too. Batman could potentially figure out Danny's weaknesses with his detective skills. And Wonder Woman with her combat experience could pose a real threat to Danny in a face - to - face battle.
One possible plot could be that Danny Phantom's ghostly abilities are detected by the Justice League. They initially view him as a threat but then realize he can be an asset. Danny could help them with foes that have intangible or otherworldly powers. For example, against an enemy that can phase through walls or possess people, Danny's experience dealing with ghosts would come in handy.