One idea could be exploring the backstories of the Smiling Friends characters in more detail. For example, what made Pim and Charlie become Smiling Friends in the first place? Another could be creating a crossover with another popular animated series, where the Smiling Friends have to interact with different characters and face new challenges.
A great idea for Smiling Friends fanfiction is to focus on the villains or antagonists in the series. Develop their characters more, give them motives and backstories that make them more than just one - dimensional bad guys. You could also write a fanfiction where the roles are reversed, and the villains are the ones trying to spread smiles while the Smiling Friends are the ones causing trouble, which would be a really interesting twist on the original concept.
A 'friends crossover fanfiction' with 'How I Met Your Mother' could be really fun. Maybe Ted Mosby could be in New York for a job interview and end up at Central Perk. He meets the friends group and starts sharing his stories about searching for love. The different perspectives on relationships between the two shows would create great storylines.
One idea could be to explore the friendships in different time periods. For example, how their friendships might have been different during their academy days compared to when they are on missions as adults. Another could be a 'what if' scenario, like what if Naruto made friends with an outsider to the village early on.
To start writing Smiling Friends fanfiction, you should familiarize yourself with the show's universe, its rules, and the personalities of the characters. You can take inspiration from your favorite episodes. After that, just start writing. Don't worry too much about making it perfect at first. Let your creativity flow. You might start with a description of the setting, like the Smiling Friends office, and then introduce a problem or a task that the characters need to deal with. As you write, keep in mind the humor and the positive, quirky nature of the show.
One idea could be Eevee going on a journey to discover its true evolution form among its friends. Another could be the friends teaming up to save a rare Pokemon in their habitat. Maybe Eevee and its friends get involved in a Pokemon contest and face various challenges.
One idea could be that Ash and Paul team up for a special Pokemon tournament that has never - been - done - before. They have to put aside their differences and learn from each other's battle styles. Another plot could be that they get lost in a mysterious forest while on a Pokemon journey and have to rely on each other to find their way out, all while encountering rare and strange Pokemon. A third plot might be that they start a Pokemon training school together, sharing their knowledge and experiences with younger trainers.
One idea could be that Jerry and Elaine visit Central Perk. They meet Chandler and Joey, and there's a whole mix - up about a couch. Jerry wants to buy it from Joey, but Chandler has some hidden feelings for it. Another could be Phoebe dating Kramer. Kramer's wacky antics drive Phoebe crazy in a love - hate relationship way.
One idea could be Sonic and Shadow having to team up to save a new character that has a special power that could be misused by the bad guys. They start off not getting along during the mission but gradually learn to respect each other's skills.
One idea could be Ash and his friends stumble upon a rare and powerful new Pokemon that has the ability to control time. They then have to figure out how to deal with this Pokemon without causing chaos in the timeline.
One idea could be that Naruto and Kurama have a day - out in the Hidden Leaf Village. They visit all the places Naruto used to go as a kid, like Ichiraku Ramen, and Kurama makes funny comments about human food. Another could be that they team up to prank the other villagers in a harmless way, just for fun.
A great idea for 'harry potter and friends crossover fanfiction' is a crossover with 'Narnia'. The magical world of Narnia and Hogwarts have some similarities. Harry and his friends could enter Narnia through a magical portal in Hogwarts. They could help the Pevensie children in their battles against the White Witch. Another option is a crossover with 'The Chronicles of Prydain'. Harry and his friends could journey to Prydain and encounter the magical creatures and challenges there. And a crossover with 'Fantastic Beasts' but in a different way, like the main characters from 'Harry Potter' meet Newt's ancestors and have adventures with them.