Some fanfictions might have a plotline where Robin's super powers are a result of a scientific experiment gone wrong. He then has to deal with the consequences of not only having these powers but also the fact that there might be people out there who want to reverse the process. Along the way, he might make new allies who also have unique abilities, and together they form a sort of super - team to fight against the forces that want to harm them.
One common plotline could be Robin initially struggling to control his new super powers. For example, he might accidentally use his strength and break things around him. Another could be that he has to keep his powers a secret from his friends at first to protect them. And then there could be a villain who is specifically targeting Robin because of his newfound powers.
In this fanfiction, Robin might get powers as a result of a genetic mutation triggered by a rare chemical. These powers could include enhanced speed and the ability to see in the dark. He initially hides his powers from the team because he's afraid of how they'll react. But when a dangerous situation arises where his powers could be the key to victory, he reveals them and they all work together to defeat the enemy and accept his new status.
Often, Robin and Raven are paired in these fanfictions. Raven's dark powers and Robin's new super powers could create an interesting contrast. They might have to team up to fight a common enemy that is attracted to their combined power levels. Additionally, some fanfictions might pair Robin with other DC characters outside of the Teen Titans, like Wonder Woman. She could help Robin understand the greater scope of his powers and how they fit into the DC universe as a whole.
Maybe the main antagonist is an old enemy of Robin's who becomes jealous of his new powers. This enemy then devises a plan to steal Robin's powers or at least neutralize them so that he can regain his former status as the top threat. He could be a powerful martial artist or a criminal mastermind with a large network of henchmen.
One interesting plotline could be Naruto having the power to control time. He could use this to prevent tragedies in the past, like the death of his parents. Another could be him having the ability to communicate with all animals, leading to new alliances and strategies in battles.
One common scenario is when a new character is introduced. If this new character shows an interest in Starfire, Robin gets all riled up. He starts doubting himself and thinking that Starfire might like this new person more.
In 'nico gets hurt fanfiction', a frequent plotline is related to his powers. Sometimes, when he overuses his powers of the Underworld, it can cause him to get hurt. It's like his body can't handle the strain. Also, there could be plotlines where Nico is hurt because of a betrayal. Someone he trusts might turn on him, leading to him getting injured either physically or mentally.
In this type of fanfiction, a plotline could be that Ichigo's sickness is caused by some sort of spiritual poison or curse. His friends then have to go on a quest to find the antidote. It could involve a lot of detective - like work, like figuring out who poisoned him and why. Another aspect could be that Ichigo's sick state makes him more vulnerable to his inner demons. He might have hallucinations of past failures or enemies, and he has to fight them off mentally while also dealing with his physical illness.
One common plotline could be Raven getting hurt during a battle with a powerful villain. Maybe she underestimates the enemy's strength and gets seriously injured, which then leads to her friends rallying around her to protect and heal her. For example, her teammates in the Teen Titans might use their combined powers to fend off the villain while trying to get her to safety.
One common plotline could be Toph getting hurt during a battle. Maybe she underestimates an opponent's new technique and gets injured. Another could be an accident while exploring a new and dangerous area. For example, she might fall into a hidden crevice in a cave. And sometimes, it could be due to a betrayal within the group she's with, where someone she trusts leads her into a trap and she gets hurt as a result.
Often, in fanfictions where Hiccup gets mad, there's a plotline about him getting angry with his father's old ways being forced upon him again. Maybe the elders on Berk want to go back to the old dragon - fighting traditions, and Hiccup is furious because he has worked so hard to create peace between dragons and humans. He might have to fight against this in a very angry and determined way. Additionally, he could get mad at someone who mistreats a dragon he has befriended, which would trigger his protective side and his anger towards the wrongdoer.