Another plot could be Dexter traveling to a different dimension where all the characters from different cartoons exist. There, he has to find a way back home while also dealing with the chaos of this new world filled with strange and familiar characters.
One idea could be Dexter crossing over with another smart character like Jimmy Neutron. They could compete in a science fair, leading to all kinds of wacky inventions and mishaps.
One idea could be that the BAU team from Criminal Minds is called in to investigate a series of murders that seem to have a connection to Dexter's 'hobby'. Dexter, being the secret serial killer who targets other killers, might initially be a suspect. Then, as the story unfolds, they could end up working together to take down a bigger network of criminals that neither could handle alone.
One possible plot could be that one of Dexter's female friends or a female character in the Dexter Laboratory world discovers she is pregnant. She might then turn to Dexter for help, thinking his scientific genius could assist in some way, like creating a device to monitor the baby's health in a unique way.
A plot where Dexter's technology malfunctions and sends Ash into an alternate Pokemon universe. In this universe, the roles of Pokemon and trainers are reversed, and Ash has to figure out how to get back while also dealing with this strange new world. This could involve lots of interesting interactions and battles. For example, he might have to convince the Pokemon to help him instead of commanding them like he's used to. It would also be a great opportunity to explore different character relationships and how they adapt to this new situation.
One idea could be that Raven discovers she's pregnant and is initially scared because of her unique powers. Dexter, being the scientific mind, tries to find a way to ensure the baby will be healthy. He starts researching how Raven's powers might affect the pregnancy.
Perhaps in the fanfiction, there could be a love triangle situation. Brick is attracted to Blossom's power and beauty, while Blossom is intrigued by Dexter's intellect. Dexter, on the other hand, starts to develop feelings for Blossom but is also in awe of Brick's physical abilities. This complex relationship web can drive the plot as they navigate their emotions and the challenges that come with their different personalities.
One idea could be a dexter fanfic where Dexter has to team up with his sister Debra to solve a case that has personal implications for them both. Another could be a fanfic set in an alternate universe where Dexter's dark passenger is more of a positive force in his life. Maybe a fanfic where Dexter tries to mentor a young protege who also has a hidden, darker side.
One idea could be a crossover with Pirates of the Caribbean. The Assassin could team up with Jack Sparrow to find a hidden treasure that is also related to an ancient Piece of Eden. They'd face challenges like sea monsters and rival pirates.
Well, a great plot for such a fanfiction could be a crossover with the Sonic the Hedgehog series. Sonic's speed could be a useful asset in the time - constrained world of Majora's Mask. He could help Link quickly reach different areas of Termina to complete his tasks before the moon crashes. Also, a crossover with the Metroid series might be interesting. Samus could arrive in Termina, and her advanced weaponry and suit could help in the fight against the monsters there. And perhaps Link could learn some new skills from Samus, like better ranged combat.
One idea could be a crossover with 'Alice in Wonderland'. Kino could enter the strange world of Wonderland and have adventures with the Mad Hatter and Cheshire Cat. Another could be a crossover with 'The Wizard of Oz'. Kino might travel down the yellow brick road, encountering different challenges in Oz.
One idea could be a crossover with 'Lost'. The survivors of the 'Lost' plane crash end up on Gilligan's Island. They could interact with the Gilligan's Island cast, share survival skills, and there could be a clash of cultures. For example, Sawyer's con - man ways might be at odds with the simple - mindedness of Gilligan. Another plot could be a crossover with 'Jurassic Park'. Dinosaurs somehow end up on the island. The Gilligan's Island gang has to figure out how to deal with these prehistoric beasts while still trying to get rescued. Maybe the Professor uses his scientific knowledge to try and find a way to co - exist or get rid of the dinosaurs.