Well, Harry could immediately try to find the owl's owner. He might use magic to track down where the owl came from. If it was a school owl, he'd probably take it to the owlery at Hogwarts and ask the other owls if they knew who it belonged to. Then he'd wait for the owner to come and claim it while making sure it was getting the proper care.
Perhaps Harry would keep the owl himself if he couldn't find its owner. He'd name it something like 'Shadow' or 'Feather'. He'd have to learn how to take care of an owl properly. He'd need to get food for it, like owl treats and mice. He'd also need to make a comfortable place for it to rest, maybe in his dormitory. He'd probably ask Hermione for help since she's good at researching how to care for magical creatures.
In some fanfictions, Harry might take the injured owl to Hagrid. Hagrid, being an expert with magical creatures, would then tend to the owl's wounds. He might use various potions and spells to heal it. For example, he could use a healing charm that he learned from his time at Hogwarts or some special herbs from his garden.
He might first try to calm the owl down. He could use a soft voice and gentle magic, like a simple soothing spell. Then he'd carefully examine the injury. If it was a broken wing, he'd try to splint it with a small stick and some cloth.
In this kind of fanfiction scenario, Snape might initially be conflicted. On one hand, he has his long - standing dislike for James Potter, Harry's father. But on the other, his sense of duty as a Hogwarts professor could kick in. He might reluctantly start to heal Harry, all the while muttering under his breath about how much trouble Harry always seems to get into, just like his father. Then, as he heals Harry, he might start to see some of Lily, Harry's mother, in him and soften a bit.
There are many possibilities. Maybe Ash discovers that Drati's injury is part of a larger conspiracy. Or, it could bring Ash and Drati closer together as they go through this ordeal.
Next, Sirius might immediately send for help from other members of the Order of the Phoenix. He knows that Hermione's knowledge and skills are crucial for the fight against the Dark Arts, so he wants to ensure she gets the best care.
Well, in a story like this, Harry might first be really surprised to find the Pokemon egg. He'd probably try to figure out what it is. Maybe he takes it to his friends, like Hermione and Ron, and they all start researching about it together. They could be confused because Pokemon eggs are not from their world. Then, as the story progresses, the egg might hatch and out comes a cute little Pokemon. Harry would then have to learn how to take care of it.
Maybe Ash decides to help Riolu recover and they form a special bond on his journey.
In many such fanfictions, Ginny might immediately rush to Harry's side. She could be extremely worried and determined to help him get better. Maybe she uses her magic skills to heal him or just stays by his side to offer emotional support.
Well, often Harry will enter the Room of Requirement in fanfiction and find it full of secrets related to his family. Maybe there are portraits of his ancestors or diaries that reveal important family history and give him new insights into his own powers and destiny.
Well, it depends on the specific fanfiction. But generally, Harry could encounter some sort of magical trial or test in Godrick Chambers. For example, he might have to prove his worthiness as a Gryffindor by facing challenges that test his courage, intelligence, and loyalty. And perhaps he meets the spirit of Godrick Gryffindor who gives him some crucial advice or power.
Well, it could lead Harry to master the Appari skill quickly and use it to solve some urgent problems.