They could have an adventure in a lost ancient city. The city is filled with traps and puzzles. Cynder's ability to sense danger would help them avoid the traps. Ember could use her brute force to move heavy objects blocking their path. Sheila's nimbleness would be useful for climbing over obstacles. Elora would decipher the ancient inscriptions on the walls to find the way forward, and Bianca would keep track of their supplies and make sure they stay on schedule.
A time - travel adventure is also a possibility. They could be sent back in time to a crucial moment in their world's history. Cynder, Ember, Sheila, Elora, and Bianca have to make sure that certain events happen as they should, without changing the future too much. Each character would have to adapt to the different time period. Cynder might struggle with the more primitive ways of the past at first, but then find ways to use her skills. Ember would have to control her strength so as not to arouse too much suspicion. Sheila would have to blend in with the local population. Elora would study the magic of that time period, and Bianca would figure out how to use the limited resources available to them.
A fanfic could focus on the relationships between these characters. Maybe there's some initial tension between Cynder and Sheila due to their different personalities, but as they face challenges together, they learn to understand and respect each other. Ember could be the one who tries to keep the peace among them all. Elora might be the one who discovers a hidden prophecy about their group, and Bianca has to figure out how to use it to their advantage.
One good 'Cynder and Ember' fanfic could be 'The Adventures of Cynder and Ember' which explores their friendship in a new magical world. It has great character development.
He could have adventures in search of rare ingredients. Naruto, with his ninja skills, would be great at traversing difficult terrains to find ingredients that Toriko wants. They might go to places like the Gourmet World, where Naruto would face new and strange creatures.
They could go on a quest to find a magical flower that can make anyone speak in rhymes. Donkey would be excited about this as he loves to talk, and Dragon would be there to protect him from any danger on the way.
They could have an adventure in a mysterious forest. Hypno could use its powers to communicate with the forest Pokemon and find a hidden path that leads to a secret grove filled with rare berries. Serena could then use these berries to make special Pokeblocks for her other Pokemon.
Well, they could encounter ancient secrets during their team - up. Maybe they find a lost ninja art that was long forgotten. Itachi's knowledge of various jutsu and Naruto's ability to quickly learn new things would help them understand and perhaps master this new art. And in battles, they would be a formidable duo, using their unique abilities in unison.
He could have adventures involving other sea - related deities. Since Thetis is a sea - goddess, he might interact more closely with her kin. For example, he could be sent on a quest by Thetis to retrieve a powerful artifact from the deep sea that is guarded by a fearsome sea - monster.
Maybe they are sent on a mission to explore an ancient, mysterious forest. Naruto would be excited by the unknown, while Shikamaru would be more cautious. Along the way, they encounter strange creatures and hidden traps. Naruto might rush in at first, but with Shikamaru's quick thinking, they would learn to work together to overcome the obstacles and discover the secrets of the forest.
He could have an adventure where he tries to broker peace between the vampires and werewolves. Given his noble status as the second son of a duke, he might have the influence and diplomatic skills to attempt such a feat. He could travel between the two camps, facing hostility from some members who are more set in their ways of the eternal conflict.
He could have adventures exploring different planets. For instance, he might go to Tatooine and use his Sage abilities to survive in the harsh desert. He could also get involved in the fight against the Empire, using his Shadow Clones to gather intelligence.