In a Young Justice Robin Cereal Fanfiction, the plot could revolve around Robin having a bet with his teammates about who can finish a large box of a really difficult - to - eat cereal first. But as they start the bet, they realize that there are strange things happening around the cereal. Like, it seems to be attracting small, strange creatures. So they have to stop the bet and figure out what's going on with this cereal before it causes more trouble.
You can try fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. They usually have a large collection of fanfictions, and you can search specifically for 'Young Justice Robin Cereal' related ones.
Well, in this fanfiction, perhaps Robin left because of some misunderstanding with the team. The Young Justice team then starts to recall all the great things he did for them. They search everywhere, from Gotham to other far - flung places. They might even encounter new allies or enemies during their search for Robin. As they get closer to finding him, they also start to resolve the issues that led to his departure in the first place.
A possible plot is that Robin has a falling out with the Young Justice leadership. He feels that their methods are too soft or that they are not making a real difference. Frustrated, he decides to join the villains who promise him a more 'direct' approach to dealing with the world's problems. He could then be involved in high - stakes heists and battles against his old comrades, all while grappling with his new identity as a villain.
Maybe there's a plot where they have to go undercover as a couple. As they pretend to be in love for the mission, they start to actually develop feelings for each other. The kiss could be a turning point where they admit their real emotions to themselves. For example, they might be infiltrating a villain's lair where only couples are allowed in, and during this time, their relationship deepens.
One plot idea could be that Robin was on a secret mission all this time. He was sent by Batman to infiltrate a powerful and dangerous organization that had ties to the events that were about to unfold in the Young Justice universe. Now that he has gathered enough information, he returns to the team to share what he has learned and help them fight the new threat.
One plot idea could be that they are undercover on a mission as a couple. As they get into character, they end up having a real moment and kiss. This kiss then makes them question their true feelings for each other.
One possible plot could be that Robin is kidnapped by a new villain who wants to use his knowledge of the Young Justice team against them. The team then has to race against time to find him and stop the villain's evil plan.
Another scenario could be that Robin is caught in a trap set by a super - villain. The trap could be a time - bomb - like situation where he has to choose between saving himself or a large number of civilians. He chooses the latter and gets killed in the process, leaving his friends in the Young Justice team to avenge his death.
One possible scenario could be that the experimenters are trying to enhance Robin's physical abilities. Maybe they use some sort of advanced technology or strange serums. Another could be that they are trying to access his memories, perhaps related to Batman's secrets or the inner workings of the Young Justice team. It could also be an experiment to test his mental resilience under extreme stress.
One reason could be mind control. Maybe an enemy has managed to gain control over Robin without the others knowing. Another possibility is that he has some hidden agenda related to his past. For example, if there are secrets from his training days that are now coming to light and making him act as a mole.