Make Andy Lemon resourceful. He should be able to think on his feet when dealing with Chucky. He could use his knowledge of the environment, his own wits, and any available tools to outsmart Chucky. For instance, if Chucky traps him in a building, Andy could use his knowledge of the building's layout to find an escape route and also set up traps for Chucky in the process.
One interesting storyline could be Chucky trying to manipulate Andy Lemon into doing his evil bidding in a more psychological way rather than through brute force. Maybe he uses false promises or plays on Andy's emotions.
A plot idea could be that Chucky gets cursed in a way that he is forced to protect Andy. So, he has to follow Andy around and keep him safe from other threats in the horror - filled world they inhabit. This would lead to a lot of comical and also tense situations as Chucky is not used to being a protector. And they could gradually develop an understanding of each other's perspectives during this time.
Rather than enemies, they could be shown as reluctant friends. They might start to communicate more and find that they have common interests. For example, they could both be interested in stopping a new evil force that has emerged in their town. This would force them to work together and over time, their relationship would change from one of hatred to one of mutual respect.
Yes, there might be some. Fanfiction often explores unique relationships. However, it's a rather strange pairing considering Chucky is a horror character. But in the world of fanfiction, all kinds of unexpected pairings can be created.
Fanfiction.net could also be a place to look. However, keep in mind that this is a rather unusual concept so it might not be easy to find. You may need to use the search function carefully, typing in relevant keywords like 'chucky', 'andy' and 'love' to see if any relevant stories pop up.
Survival is also a big theme. When these two are in the same story, the characters in the fanfiction often have to figure out how to survive not just one, but two terrifying killers. This can lead to some really intense and suspenseful plotlines, as the victims have to deal with Jigsaw's mind games and Chucky's unpredictable attacks at the same time.
One common theme is the struggle between good and evil. The oc usually represents the 'good' side, trying to either stop Chucky's evil deeds or at least survive his attacks. Another theme is the unexpected relationship that forms between the two. Despite Chucky being a murderous doll, the oc often finds themselves in a complex situation where they have some sort of connection with him.
The main characters are obviously Chucky, the infamous killer doll, and Buddi, the more innocent and friendly toy. Chucky is known for his malevolent nature, while Buddi is typically more naive.
First, develop your characters well. Define the yandere's traits clearly, like their possessiveness and obsessive nature. For the oc, give them unique qualities. Then, create a plot that revolves around the yandere's fixation on the oc. Maybe start with a chance encounter that sets off the yandere's interest.