Another plot could involve an OC who is a computer genius. He creates a new type of spy gadget but it gets stolen by an enemy spy organization. The Totally Spies and the OC then have to work together to retrieve the gadget and stop the bad guys from using it for evil purposes.
Well, you could start with an OC who is an inventor. The OC invents some really cool gadgets that catch the attention of the Totally Spies. They start to work together on missions, and during this time, a harem dynamic could develop. Maybe the OC has a kind heart and is always there to support the spies, which makes them all develop feelings for the OC. Also, the OC could have a secret identity that is slowly revealed throughout the fanfic, adding more drama to the relationships.
Another idea is that the Totally Spies girls are sent on a mission to the Hidden Leaf Village. They end up getting involved in the Chunin Exams. They use their high - tech gadgets to help some of the younger ninjas, like Konohamaru, in the exams while also learning about the ways of the ninja. This could lead to some really fun and action - packed scenes.
A crossover with Sailor Moon might also be cool. The Totally Spies could find themselves in the Sailor Moon universe and have to help the Sailor Scouts fight against a new enemy that is after some powerful artifact in both their worlds. The spies' espionage skills would be useful in gathering information about the enemy's plans, while the Sailor Scouts' magical powers could be used in direct combat.
One plot idea could be that the Black Knight has a change of heart and teams up with Clover to take on a new, more powerful enemy. They could use their combined skills, Clover's charm and agility, and the Black Knight's strength and combat expertise.
One idea could be that the Totally Spies girls are on a mission in New York and accidentally cross paths with Spiderman. They initially mistake him for a villain but soon realize he's on their side. They then team up to take down a common enemy who is using both high - tech gadgets and super - powered minions.
There are fanfictions where the Totally Spies characters time - travel. For example, they might go back to the 1960s and have to complete a mission using the technology and fashion of that era. It's really cool to see how they handle the challenges in a different time period.
One idea could be exploring a romantic encounter between the spies during a dangerous mission. Maybe they have to go undercover as a couple and real feelings start to develop.
One idea could be that a new villain, who has a vendetta against the spies, specifically targets Alex because of her skills. The kidnapper could be from an organization that the spies have recently thwarted, and they want to use Alex as a bargaining chip to get their plans back on track. They might hold her in a high - tech lair, filled with all sorts of traps and security measures for when the other spies come to rescue her.
One interesting storyline is when they have to go undercover at a fashion show where the villain is using the models as part of an evil plan. The spies have to blend in as models while also trying to figure out what's going on.
In a fanfiction, the Black Knight Queen could be a time - traveler. She comes from a future where the world is in chaos and she believes that by changing the past (the time of the Totally Spies), she can prevent the apocalypse. This would lead to a lot of interesting interactions as the Totally Spies try to figure out if she's a friend or foe.