Perhaps Rouge is sent to the Naruto world to retrieve a powerful artifact that has been lost there. She enlists Naruto's help as he knows the land well. As they search for the artifact, they encounter many challenges like other ninja clans who also want the artifact. Naruto's ninja skills and Rouge's acrobatic and thieving abilities combine to make a great team.
A really cool plot idea would be that Naruto is part of a prophecy where the one with bat wings will save the ninja world from a new, flying - based threat. His bat wings give him unique abilities in combat, like the ability to perform aerial acrobatics that no other ninja can. He has to train hard to master these new skills. His friends initially might be a bit shocked but then support him as he embarks on this new adventure to protect the world.
Perhaps the bat summon is from a cursed place, and when summoned, it brings a dark influence. The Naruto characters then have to find a way to break the curse on the bat and its place of origin. This could involve a journey to discover the history of the bat summon and the secrets of the place it comes from. It would be a story full of mystery and danger.
The little bat could discover a hidden cave filled with ancient bat artifacts. It then has to protect this cave from other animals who might want to take over or destroy it. This could involve making alliances with other bats and using its wits to outsmart the invaders.
In fanfiction, 'Rouge Bat' could potentially be a character. It might be a unique creation by the fanfic author, perhaps with certain characteristics like special powers or a distinct personality. However, without more context specific to the particular fanfiction in question, it's hard to define it precisely.
One popular story might be about their unexpected team - up in a crossover universe. They could face a common enemy and use their unique skills together. For example, Naruto's shadow clone jutsu combined with Rouge's flying and stealth abilities to infiltrate an enemy base.
One idea could be that Rouge discovers Danny's secret identity and tries to use it to her advantage in some way, like getting information from the Ghost Zone. Another could be a team - up where they have to face a common enemy that is causing chaos in both the human world and the world Rouge is familiar with.
Maybe they get caught in a magical spell that makes them reveal their true feelings. This leads to a tender kiss as they both realize how much they care for each other. Rouge could be the first to initiate it, surprising Shadow with her boldness.
One plot idea could be that they have to keep their marriage a secret from their enemies at first. This would add an element of mystery and danger as they try to balance their normal heroic duties with their new relationship status.
One idea could be that Rouge discovers some secret information about a powerful organization and Tails is wrongly accused of being a traitor when he tries to help her. So they have to work together to clear their names and expose the real villains behind the scheme.
One idea could be that the bat family encounters a supernatural force that gives them new powers. For example, they might come across a magical amulet that allows them to fly without their gadgets for a short time.