Fanfiction Ideas for a Ninjago and TMNT Crossover

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 idea could be that the turtles from 2012 somehow get transported to the 2018 universe. They could be really confused by the different art styles and the new gadgets the 2018 turtles have. The 2018 turtles, on the other hand, would be intrigued by the more traditional look of the 2012 turtles. This could lead to some funny moments as they try to communicate and figure out how to get the 2012 turtles back to their own universe.

One idea could be that the ninjas from Ninjago end up in the world of Slugterra by some magical portal. They then have to learn about slug slinging and team up with the local sluggers to fight a common enemy. Maybe an ancient evil that threatens both their worlds.

One idea could be that the Turtles from 2003 get transported to the 2012 universe and they have to deal with the different versions of their enemies. For example, the Shredder in the 2012 version might have some new powers or tactics that the 2003 Turtles aren't used to.

A possible plot is that an ancient evil that was sealed away in the 2003 universe is accidentally awakened by the arrival of the 2012 turtles. The 2003 turtles initially blame the 2012 ones but then realize they need to work together. They combine their strengths, with the 2012 turtles' modern thinking and the 2003 turtles' deep knowledge of ancient ninja lore, to defeat the evil.

One idea could be that the Turtles from 1987 end up in the 2003 universe and have to adapt to the darker and more serious tone. They could team up with the 2003 Turtles to fight a common enemy like the Shredder. The 1987 Turtles' more light - hearted and comical ways might initially clash with the 2003 Turtles' brooding nature, but they eventually learn from each other.

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.

A possible plot for this crossover fanfiction is that the worlds of Ninjago and Chima start to merge due to some magical mishap. This causes chaos as the different species and cultures collide. The heroes then have to figure out how to separate the worlds again. For example, the ninja from Ninjago might have to work with the lions from Chima. Another idea is that a group of villains from both worlds team up and the heroes have to form an alliance of their own. They would need to overcome their differences and learn from each other's fighting styles. There could also be a story where a Ninjago character is transported to Chima and discovers a long - lost relative from there, which adds a personal touch to the adventure.

One idea could be that the Turtles end up in the Underground world of Undertale. They might have to navigate through the various regions, like Snowdin or Hotland, using their ninja skills. For example, they could use their stealth to avoid some of the more dangerous monsters. Another plot could involve the characters from Undertale being brought to the Turtles' New York. They would then have to deal with the Foot Clan and other threats in this new, strange environment.

One idea could be that the Turtles and the Power Rangers team up to fight a common enemy that has the ability to morph between dimensions. Another could be a story where the mutagen from the Turtles' world gets mixed with the Power Rangers' technology, creating new and unexpected powers for both groups. Or perhaps a plot where the villains from both universes join forces, forcing the heroes to overcome their differences and work together.