Well, it really depends on what you consider 'good'. Some people might like the ones that focus on the emotional relationship between TKO and KO, while others might prefer more action - packed stories. You should look for reviews or ratings on the fanfiction platforms to find something that suits your taste.
Archive of Our Own is a popular place to start. It has a large collection of fanfictions.
They might have some connections, but it depends on the specific storylines and characters.
They might be related in terms of combat techniques or storylines. Sometimes one could lead to the other.
One plot idea could be that they have to team up to save their family from a new villain in town. Since they usually have their differences, at first they struggle to work together, but as the danger mounts, they start to understand each other better and combine their unique powers to defeat the foe.
Well, it could change things a great deal. Enid and Rad would be less likely to be caught in the middle of their disputes. Their parents would also be able to trust them more. For example, they might be given more responsibilities around the house or in the family business (if there is one in the fanfiction) because they are working together instead of against each other.
A fanfiction could center around a lemon - based competition in the Ok Ko! world. Carol and Enid decide to enter as a team. They have to compete against other characters. They come up with creative strategies, like using Carol's physical abilities to gather ingredients and Enid's knowledge to create the best lemon - based product. Their teamwork and friendship are put to the test.
One interesting story could be about how the characters in 'ok ko' face a new and unexpected challenge that is presented in a very creative way in the fanfiction. Maybe they have to deal with a strange new villain who has powers related to lemons in some wacky way.
Rad would also be a common main character. He's KO's friend, and in the fanfiction, he might be involved in some sort of lemon - inspired adventure with KO. Maybe they go on a quest to find the rarest lemon in the world or something.
The unique character dynamics. Dendy is smart and tech - savvy, while Ko Lemon has her own charm. Their relationship with OK KO can create complex and interesting scenarios in fanfic.
I'm not sure where to specifically find 'ok ko dendy x ko lemon fanfic'. You could try searching on some fanfic platforms like Archive of Our Own or FanFiction.net.