A possible plot could be that a new villain in Gotham creates a tickle - themed trap. Batman and Robin get caught in it. As they are being tickled, they start to remember some of their childhood memories related to tickling, which gives some depth to their characters. Meanwhile, they have to use their wits to escape the trap and stop the villain.
Maybe in a fanfic, there's a magical villain who curses Batman and Robin to be overly ticklish for a day. This forces them to rely on their other skills like detective work and stealth while dealing with this strange affliction. They might also have to ask for help from their allies, leading to some really funny interactions.
One idea could be that Robin gets trapped in an alternate dimension where the villains are in control and Batman has to figure out a way to bring him back. Another could be a story where Batman is injured and Robin has to take on a major villain alone, learning to trust his own instincts more. Maybe a plot where they encounter a new, powerful ally who turns out to have a hidden agenda that threatens Gotham.
One idea could be exploring Robin's struggle to live up to Batman's legacy in the Batman Beyond era. Maybe he has to face a new villain who is specifically targeting the new Batman and Robin duo because of their connection to the old heroes. Another plot could involve Robin discovering a long - lost technology from the original Batman's days that holds the key to stopping a major threat to the future Gotham.
One plot idea could be Robin getting kidnapped and Batman having to use all his detective skills to find him. It would show their strong bond as father and son. Another could be Robin wanting to prove himself to Batman by taking on a tough villain alone but getting in over his head, and Batman coming to his rescue and teaching him a valuable lesson about teamwork.
One idea could be exploring Robin's training in more depth. Maybe he has to face a new and extremely powerful villain all by himself during a training exercise that Batman has set up, which would test his skills and loyalty. Another plot could revolve around Batman and Robin's relationship being strained by an outside influence, like a media smear campaign against them that makes the public question their motives.
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.
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 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.
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.
Well, you could have a story where the Bat - family faces a crisis that makes them question their purpose. Robin might start to doubt if he should continue in this life. The family then has to work together to reaffirm their values. It could also be interesting to see a story where an old enemy returns, but this time targets the emotional weaknesses within the Bat - family.
Focus on the comical aspect. For example, have Robin play a prank on Batman by trying to tickle him while they are on a stakeout. Batman then pretends to be annoyed but secretly enjoys the light - hearted moment. Avoid any violent or overly suggestive themes.