A group of power - hungry ninjas from a neighboring village could be the main antagonists. They hear about Naruto's rainbow fire and believe that if they can take it from him, they can dominate all other villages. They start a series of attacks and plots against Naruto and his village, constantly trying to outwit him and steal the rainbow fire. Their leader could be a particularly cunning ninja who has his own vendetta against Naruto's village and sees the rainbow fire as the perfect weapon to achieve his revenge.
Well, in 'naruto rainbow fire fanfiction', a cool plot might be that the rainbow fire is actually a key to a different dimension. Naruto, being the curious and brave ninja he is, accidentally stumbles upon this while on a mission. He then has to figure out how to use the rainbow fire to get back to his own world, all while facing strange creatures and new forms of chakra in this other dimension. Also, the rainbow fire could be related to a prophecy that only Naruto can fulfill, which sets him on a grand adventure.
A more complex fanfiction could involve a villain who is stealing both chakra and the magic that powers Rainbow Dash's world. Naruto and Rainbow Dash would have to combine their unique abilities. Naruto could use his Rasengan, and Rainbow Dash could use her Sonic Rainboom to defeat this powerful villain.
Perhaps Naruto inherits the Rainbow Chakra. It could be a long - lost power that was once held by an ancestor. Through a series of events, like uncovering a hidden family heirloom or a secret scroll, he discovers his connection to this special chakra and learns how to unlock and use it. This would add a whole new layer to his character, as he now has a responsibility to uphold the legacy of this powerful chakra.
They could meet through a magical portal. For example, a portal could open up in Naruto's world due to some strange jutsu gone wrong, and Rainbow Dash could fly through it while on a mission in her world. This sudden encounter would be a shock to both of them at first.
Yes, in certain fanfictions Naruto is immune to fire. This can add an interesting twist to the story. For example, if he's facing a powerful fire - using enemy, his immunity gives him an advantage. It also allows for new plot developments and character interactions that wouldn't be possible in the original story.
Well, in fanfiction, just about anything can happen. Since it's not bound by the strict canon of either the Naruto universe or the Avatar universe (where fire bending comes from). Writers can give Naruto the power to fire bend. They might do this to create new plotlines, like Naruto using fire bending to fight a new kind of enemy or to master a new form of combat. It's all about creativity in the world of fanfiction.
Often, the main character is an original character created specifically for the fanfiction. This character is usually the one with the rainbow eyes, like a young ninja who discovers their unique eye power and has to learn how to use it in the Naruto world.
In some 'Naruto Rainbow Eye Fanfiction', the rainbow eyes might be a symbol of a long - lost clan. The story could revolve around the protagonist with these eyes trying to discover their clan's history and the secrets behind their special eyes while facing challenges from other ninja clans who are either envious or afraid of their power.
There's also the 'Inferno Storm Jutsu' in some fanfictions. It creates a large - scale storm made entirely of fire. The fire in this storm has different intensities, with the center being the hottest and most destructive. It can cover a large area, making it a great offensive move against groups of enemies.