I'm not sure specifically as there could be many different plots in a fanfiction with that title. It might involve various characters from Zootopia sharing 100 kisses in different scenarios, perhaps as a way to show love and friendship among the diverse animals in the city.
It's probable that the main characters would be those that represent different aspects of Zootopia society. So, along with Judy and Nick, there could be a business - minded character like Mr. Big who gets involved in this 100 kisses concept. He could be using his influence to promote the idea of love and unity through these kisses. And of course, there might be some minor characters from the movie that are given more importance in this fanfiction and are part of the main cast because of their connection to the kisses, like the otter who had that incident in the movie and now is part of a new love - centered story.
Since it's a Zootopia fanfiction, it's likely that the 'one hundred kisses' are part of a plot device to drive the story forward. It could be that the main characters are in a situation where they gradually reach this number of kisses over the course of their relationship. It might also be a comical take on the idea, like they accidentally keep ending up in situations where they kiss and then they start counting. Or it could be a more serious exploration of love in a world full of different animals, where these kisses are a way to show the connection between two characters who might be from different species or have different social standings.
I don't know for sure as I haven't read it. It could be Judy Hopps and Nick Wilde since they are very popular characters in Zootopia. But it could also be other characters that the author of the fanfiction decided to focus on.
Another possibility could be Clawhauser and a new character. Clawhauser is such a friendly and loveable character. A new character could enter Zootopia and they start a journey together which involves the 'hundred kisses'. It could be a story about new friendships and how they use these kisses to make the city a better place.
One interesting plot could be two characters who start off as rivals in Zootopia but through a series of events involving 'hundred kisses' (maybe symbolic kisses like acts of kindness), they end up falling in love. For example, a fox and a rabbit might initially be at odds due to the natural predator - prey relationship in their society. But as they exchange these symbolic 'kisses' of mutual respect, understanding, and help, they break down the barriers between them.
There's a fanfic called 'Zootopia Meets Sonic's World'. In this one, some of the Zootopia characters find a portal to Sonic's world. Judy and Nick are the main Zootopia representatives. They are amazed by the different zones in Sonic's world and team up with Sonic to stop an evil force that wants to destroy both their worlds. It's full of interesting interactions between the two universes.
First, you need to understand the characters. For Sonic, know his love for speed and his brave nature. For Zootopia characters like Judy, understand her determination and Nick's sly charm. Then, come up with an interesting premise. Maybe a crossover event that brings the two worlds together in a unique way, like a magical artifact that connects Sonic's world and Zootopia.
Another idea for a Zootopia Judy x Human fanfiction could be a more adventurous story. The human could accidentally end up in Zootopia and Judy has to protect him or her from the potential dangers there. Along the way, they face challenges like the distrust of other animals towards the human, and they have to overcome these obstacles together, with their relationship evolving from a simple protector - protectee one to a deep and meaningful friendship.
Often, it focuses on the relationships between the characters in Zootopia in a more romantic or intense way. For example, it might explore the relationship between Judy and Nick in greater depth.