In such a fanfiction, perhaps the duck could be attacked by a dark force while the characters from Princess Tutu are trying to save it. But it gets hurt real bad before they can fully protect it.
It could be one of the villains in the Princess Tutu world. Maybe Fakir in his darker moments if he's being influenced by some external force that makes him act out of character and accidentally harm the duck.
Maybe Jacob gets into a fight and gets physically hurt. For example, he could be punched during an argument in the story.
In this fanfiction, T Challa might get hurt during a battle. Maybe he faces a powerful enemy who manages to wound him. This could lead to other characters coming to his aid and a story of recovery and resilience.
Naruto might get hurt during a mission with Kaka - naru. Kaka - naru could then carry Naruto back to safety and tend to his wounds. This simple act of care can strengthen their bond.
Perhaps Zoey getting hurt leads to a new friendship. There could be a character who she didn't really know before but who comes to her aid. This new friend could introduce Zoey to a whole new group of people or a new hobby. Also, her injury might make her more empathetic towards others who are in pain or going through tough times. She could start a support group at PCA for students dealing with injuries or hardships.
Well, it could be that Macy gets hurt in a magical accident. For instance, a spell backfires on her while she's trying to protect someone or something. This could lead to her being in a coma or having her powers affected. Her friends and family in the Charmed universe would be desperate to find a solution to bring her back to full strength.
If Emily gets hurt, it could lead to a shift in the team dynamics. The other Rangers would have to cover for her absence during battles. For instance, they might have to change their battle formations. Also, it could be a chance for other characters to develop. Like, one of the Rangers could take on a more nurturing role to help Emily recover.
One possibility is that the hurt Chase might be found by a new character in the fanfiction. This new character could have some unique healing powers. For example, a magical animal that can transfer its energy to Chase and make him better. Or maybe there's a hidden place with advanced medical equipment that the Paw Patrol discovers while trying to help Chase.
If Austin gets hurt, say in a sports accident, it could bring out a protective side in Ally. She might start to write songs that are more about their friendship and how she's there for him. The other characters would also have to adjust their plans. For instance, if they had a big performance coming up, they'd have to figure out how to do it without Austin being at his best. This could lead to some creative solutions like having Austin sing from a sitting position or having Ally do more of the lead vocals.
In the fanfiction, after Marshall gets hurt, the other Paw Patrol members would surely rush to his aid. Skye might use her helicopter to quickly bring Ryder to the scene. Chase could start securing the area to make sure no further danger is present. Rubble might start looking for any tools or first - aid supplies nearby. They all work together as a team, so they won't let Marshall be in pain for long.