For a Sagwa the Chinese Siamese Cat crossover fanfiction, consider a crossover with Puss in Boots. Puss in Boots is known for his swashbuckling adventures, and Sagwa could tag along. Maybe they would go on a quest to find a magical fish that can grant wishes. Also, a crossover with Tom from Tom and Jerry could be fun. Tom is always chasing Jerry, but with Sagwa around, she could try to mediate and teach Tom about the importance of harmony, like how it's important in Chinese culture. Another option is a crossover with the Catbus from My Neighbor Totoro. Sagwa could take a ride on the Catbus and explore the magical forest, experiencing things she has never seen before in her Chinese - influenced world.
First, you need to choose the other character or world you want to crossover with. If it's a character like Simba from The Lion King, think about how their worlds collide. Maybe Sagwa gets lost in the African savanna and meets Simba. Then, start with an interesting hook. For example, 'Sagwa was minding her own business in her Chinese garden when suddenly a strange portal opened and she was whisked away to a land of lions.' After that, build the relationship between the characters. Sagwa could be curious about Simba's leadership role, and Simba could be intrigued by Sagwa's unique Chinese - influenced ways.
One idea could be a crossover with a superhero universe. The talking kitty cat could gain superpowers and team up with famous superheroes to save the city. For example, it could have the power of super speed and use it to outrun villains.
A possible plot is that Sam and Cat are hired as guest stars on iCarly. Sam is initially not happy about it, thinking it's too 'girly', but Cat is super excited. Once on the show, Sam challenges Carly to a cooking duel, which turns into a complete disaster as Sam's cooking is, well, not exactly gourmet. Meanwhile, Cat befriends Spencer and they create some really strange art together that they try to sell on the iCarly webcast. This could bring in a new audience who are fans of Sam and Cat, and also create some tension between the two shows' regular characters as they adjust to having the new guests around.
One interesting idea could be a crossover with "Moana". Elsa's ice powers and Moana's connection to the ocean could create a really cool dynamic. Maybe Elsa accidentally freezes part of Moana's ocean and they have to work together to fix it. Another could be with "Tangled". Rapunzel's long hair and her adventurous spirit combined with Elsa and Anna's journey in Frozen 2 would be exciting. Rapunzel could use her hair to help them climb mountains or cross chasms. A third idea is a crossover with "Beauty and the Beast". Belle's love for books and knowledge could help Elsa understand more about her powers and the history of magic in the Frozen world.
There was this Siamese cat I knew that would always try to imitate the dog in the house. It would bark (or at least make a sound that was its version of barking) and follow the dog everywhere. It was hilarious to see a cat acting like a dog.
A Rambo crossover fanfiction could involve him crossing over into the Star Wars universe. Rambo's guerilla warfare tactics could be interesting in a galaxy far, far away. Maybe he helps the Rebel Alliance in a ground - based battle against the Empire. Or a crossover with the Predator series. Rambo would be a worthy opponent for the Predator, and the fight between them in the jungle could be epic. Also, a Rambo and John Wick crossover would be intense, two highly skilled fighters on the same side or perhaps initially at odds.
One idea could be a crossover with a modern military setting. The Decepticons could be trying to steal advanced military technology. Another is a crossover with a post - apocalyptic world where they are competing with other factions for resources. A third could be a crossover with a magical realm, with the Decepticons trying to harness the magic for their own evil purposes.
One idea could be a crossover with Naruto. Kakuzu could be sent to the Naruto universe and form an unlikely alliance with a shinobi village to fight a common enemy, like the Akatsuki from his own world turned rogue in the new universe. This would create a lot of interesting character dynamics and battles.
Another option is a crossover with 'The Little Mermaid'. The characters from the descendants could meet Ariel and her friends underwater. Evie might be interested in the mermaid fashion and could design new outfits inspired by the underwater world.
Another possibility is a crossover with the world of Naruto. The characters from MHA could participate in the Chunin Exams. Bakugo might be really into showing off his skills in this new and different kind of competition.