Maybe Batman and Robin discover a strange chemical reaction happening in an abandoned laboratory. It seems to be creating some sort of mutagenic effect. They start to study the reaction together, with Robin doing most of the hands - on lab work as he has more recent academic knowledge. Batman uses his detective skills to figure out who might be behind this experiment and why.
One possible plot could be that Batman and Robin are investigating a new villain who is using chemical weapons in Gotham. They have to use their knowledge of chemistry to analyze the substances left at the crime scenes and develop countermeasures. For example, Robin uses his school chemistry knowledge to identify a rare chemical compound in the weapon, and Batman uses his resources to find an antidote.
The main antagonist could be a deranged chemist who was once shunned by the scientific community. He uses his knowledge of chemistry to create deadly toxins and gases to get revenge on those who wronged him. He sees Batman and Robin as obstacles in his path of destruction.
In this fanfiction, a plot could involve Robin challenging Batman to a friendly competition in using the city as a jungle gym. They set up various challenges like who can get from point A to point B the fastest by only using rooftops, poles, and other urban structures as if they were jungle gym equipment. This would show their different approaches to using their environment for movement and also their relationship in a fun, competitive light.
One idea could be to have Batman and Robin face a villain who has the power to manipulate time. They would have to figure out how to stop the villain from changing history. Another could be that Robin gets kidnapped by a new, never - before - seen criminal and Batman has to use all his detective skills to find him. Maybe a third idea is that a powerful alien lands in Gotham and Batman and Robin have to team up with other heroes to deal with it.
Well, perhaps Robin is trying to avoid a villain and sees Batman's cape as the perfect hiding spot. It could be during a fight in a crowded alley, and Robin slips under the cape to surprise the enemy later.
One possible plot twist could be that Robin is influenced by a powerful and evil villain. Maybe the villain uses some kind of mind - control device or magic on Robin. For example, the Joker could find a way to make Robin see Batman as the enemy. Robin might then start attacking Batman and helping the Joker with his evil plans.
In some 'batman fights robin fanfiction', there might be an external factor like an ancient curse that affects Robin. He becomes aggressive and unpredictable, forcing Batman to fight him. This could also be related to a prophecy that Robin is supposed to bring chaos, and Batman is trying to prevent it. Batman would be conflicted as he doesn't want to harm Robin but also needs to stop the potential danger.
One idea could be Batman teaching Baby Robin the basics of detective work. For example, showing him how to analyze crime scenes for clues. Another could be a story where they face a villain who specifically targets Robin because he's young and inexperienced. A third idea might be a heartwarming tale of Batman protecting Robin during a city - wide disaster.
One idea could be that Robin discovers a dark secret about Batman's past that makes him question their relationship, leading to a tense confrontation. For example, if Robin finds out that Batman once made a deal with a villain that had far - reaching consequences. Another plot could involve a new villain manipulating Robin into believing Batman is a threat to Gotham, causing them to fight. Maybe the villain uses mind - control technology.
One interesting storyline could be Robin growing up and struggling to step out of Batman's shadow. He wants to prove himself as an independent hero while still respecting Batman's teachings.
In a fanfiction, Robin could be injured in a trap set by an old enemy of Batman. This enemy specifically targeted Robin to get back at Batman. Batman, upon finding Robin injured, is consumed with guilt and anger. He goes on a full - scale investigation to find the enemy. Meanwhile, Robin is in a critical condition and Alfred has to use all his medical knowledge to keep Robin alive. The story could focus on Batman's internal struggle between his need for revenge and his responsibility to Robin, and how he overcomes this to save both Robin and Gotham.