Another plot could involve the OC teaming up with Kid to form an unbeatable duo against Kat. The OC could bring in unique skills like being able to communicate with animals, which helps them gather intel on Kat's whereabouts and plans.
Perhaps the OC is a new kid in town who is initially scared of Kat but then discovers a hidden connection between them. Maybe they both come from the same alien origin, which changes the way they interact and fight.
Well, here's an interesting plot. There's a big storm coming to town. Kid wants to protect the town with his inventions, like building a huge umbrella - like structure. Kat, on the other hand, sees the storm as an opportunity to have some wild adventures. He starts running around, causing more damage. Kid has to stop Kat while also trying to keep the town safe. Also, a plot could be that a famous cat - trainer comes to town and wants to take Kat away. Kid has to prove that he can take better care of Kat and that Kat is better off staying with him. This leads to a series of challenges and competitions between Kid and the cat - trainer.
Maybe in the fanfiction, there could be a parallel universe where Kid and Kat have different personalities. They are forced to coop to save both their worlds from destruction. Kat could be more heroic than usual and Kid could be more hesitant, creating an interesting dynamic.
One idea could be that Kid and Kat end up in a strange new world together and have to work together to find their way back home, despite their usual rivalry. They could encounter all sorts of wacky creatures and challenges along the way.
One plot idea could be that Kid and Fem Kat team up in the coop mode to solve a mystery in their neighborhood. Maybe there are strange disappearances of small objects, and they suspect a new villain in town. Another idea is that they have to compete in a friendly competition within the coop setting but end up learning more about each other's strengths and weaknesses.
A possible plot could be that the Reader moves into the neighborhood where Kid and Mr. Kat live. The Reader is intrigued by the strange relationship between the two. One day, Kid accidentally breaks something of Mr. Kat's while trying to show off in front of the Reader. Mr. Kat blames Kid and they start arguing. The Reader steps in and suggests they work together to fix it. As they do, they start to understand each other more and the Reader helps them build a better relationship.
Some fanfictions might also have a mysterious OC like Shadow. Shadow has the ability to blend into the shadows and spy on Kat. He provides valuable information to Kid and adds an element of mystery to the story.
A possible plot could be that the reader moves into the town where Kid and Mr Kat are. The reader is curious about the strange happenings between them. One day, the reader accidentally gets caught up in one of Mr Kat's traps meant for Kid. Mr Kat feels guilty and the reader uses this opportunity to make Mr Kat see how his actions are wrong. They then work together to play a friendly prank on Kid, which makes Kid laugh instead of getting angry. This starts a new dynamic between the three of them.
In a world where Kid and Kat co - exist, Kid noticed that Kat had been acting strangely lately. Kat seemed to be spending a lot of time in the old abandoned house on the edge of town. Kid, being the curious boy he is, decided to investigate. He snuck into the house one day only to find that Kat was building a giant cat - like contraption. Kid realized that Kat planned to use this to take over the town's supply of tuna. So, Kid quickly ran back home and started to build his own device to counter Kat's plan. After days of hard work, Kid was ready. He confronted Kat just as Kat was about to launch his contraption. A battle ensued, with Kid using his smarts and Kat using his feline agility.
Once upon a time, the reader was walking in the neighborhood when they stumbled upon Mr Kat. Mr Kat was up to his usual antics, plotting against Kid. The reader, being a kind - hearted soul, decided to intervene. They tried to reason with Mr Kat, explaining that Kid was just a kid having fun. Mr Kat scoffed at first, but as the reader continued to talk, he started to listen. In the end, Mr Kat and the reader formed an unlikely friendship, and Mr Kat decided to give Kid a break.
Well, perhaps there are stories where the kid and the kat team up unexpectedly. For example, they might face a common enemy like a mean neighbor's dog. In the 'kid vs kat doodle'z stories', this could lead to some really fun and unexpected adventures as they put aside their differences to deal with the dog.