One common theme is the clash of different powers. For instance, when Ninjago characters cross over with characters from other universes like Power Rangers, their unique fighting styles and powers collide. It creates exciting battle scenes where they have to figure out how to work together despite their differences.
One idea could be to have the ponies from MLP end up in the Ninjago world. Maybe Twilight Sparkle could use her magic to help the Ninjas in a big battle against an ancient evil. The contrast between the colorful and magical ponies and the more martial arts - based Ninjago characters would create an interesting dynamic.
One great 'ninjago crossover fanfic' is 'Ninjago and HTTYD Crossover'. It combines the world of Ninjago with How to Train Your Dragon in a really cool way. The characters from both universes interact in exciting adventures.
In such crossovers, Rainbow Dash from MLP could be really memorable. Her speed and daredevil attitude could be a great contrast to the more calculated moves of the Ninjago characters. She might get into races with the Ninja vehicles or try to outdo them in feats of bravery.
One idea could be that the Ninja from Ninjago are transported to the TMNT's world. They team up to fight a common enemy like the Shredder who has somehow got hold of some dark magic from Ninjago. The Ninja can show the Turtles their unique fighting styles and the Turtles can introduce the Ninja to the sewers of New York as a base.
One common theme is power combination. When characters from different universes meet in the crossover, their powers often combine in unexpected ways. For example, in a Ninjago and Avatar: The Last Airbender crossover, the ninjas' elemental powers might interact with the bending abilities of the Avatar characters.
The plot could involve a new threat emerging that affects both worlds. This threat could be a powerful sorcerer who wants to combine the technology of the TMNT world with the magic of Ninjago. The Ninja and the Turtles would have to put aside their differences and work together. They would travel between the two worlds, exploring each other's unique environments like the Ninjago Monastery and the TMNT Lair.
One great 'Ninjago Jay fanfic' is 'Jay's Adventure in the Electric Realm'. It really delves into Jay's character, exploring his insecurities and how he overcomes them. The story has a lot of action and Jay's unique sense of humor is well - presented.
In Ninjago fanfic, Cole is a great character to explore. His backstory, which includes his relationship with his father and his journey to become a ninja, provides a rich source of material for fanfic writers. Some fanfics might focus on his growth as a person and a ninja. For example, he could be facing a new challenge that forces him to develop a new aspect of his earth - power or to overcome a personal fear. His interactions with the other ninjas are also interesting to write about, whether it's his friendly banter with Jay or his more serious conversations with Zane.
Another good one is 'Ninjago and DC Comics Crossover'. Here, the ninjas from Ninjago get involved with the heroes and villains of the DC universe. Imagine the Green Ninja facing off against Superman or the villains of Ninjago teaming up with the Joker. It makes for some very unique and engaging storylines.