Hagrid would be a likely helper. He has a great knowledge of magical creatures and would surely know a lot about phoenix eggs. He could give Harry advice on how to take care of it.
In the 'Harry Potter finds a phoenix egg fanfiction', it could be that the egg has some sort of special power or mark on it. Harry could find himself in a race against time to protect the egg from dark wizards who want to use it for evil. He might also have to figure out the proper way to care for a phoenix egg, which could involve consulting old books in the library or asking Hagrid for advice.
His best friends Hermione and Ron would surely be there to help. Hermione with her vast knowledge of magic could research about the egg, and Ron with his loyalty would stand by Harry's side in any danger related to the egg.
Well, the egg could be related to a prophecy. Harry finding it sets off a chain of events. He could face many challenges as he tries to protect the egg from dark wizards who also want it for their own evil purposes. It might also lead him to discover new powers or secrets about his own past.
Dumbledore could also be involved. He's extremely knowledgeable and powerful. He might have some secret knowledge about basilisk eggs. He could guide Harry on whether to keep the egg or destroy it, depending on the greater good of the wizarding world.
Hermione would most likely help. She's always been there for Harry, and with her vast knowledge from books, she could offer a great deal of advice on how to take care of the dragon egg. Ron might also be involved. Despite his initial fear of things, he has a brave heart and would probably stand by Harry's side.
One possibility in the 'Harry Potter finds a basilisk egg fanfiction' is that the egg was placed there by a dark wizard as a trap for Harry. Harry, being the curious and brave boy he is, decides to investigate. As he studies the egg, he realizes it has ancient magic markings on it. He then starts to search for old books in the Hogwarts library to figure out what these markings mean and how they are related to the basilisk egg. Along the way, he might encounter some other magical creatures or face some challenges set by the dark wizard who left the egg there.
In this fanfiction, Harry might face a lot of challenges. First, he has to figure out how to keep the dragon egg safe. Hogwarts has rules against having dangerous creatures, so he'd need to hide it well. Maybe he'd use magic to create a special hiding place, like a hidden chamber. Then, when the egg hatches, he'd have to deal with a baby dragon, which could be really difficult as dragons are powerful and not easy to control.
In fanfiction, if Harry Potter finds a baby phoenix, it could be a very magical encounter. The baby phoenix might be in need of protection. Harry, being the hero he is, would likely take it under his wing. He could use his knowledge of magical creatures from Hogwarts to care for it. Maybe the phoenix would grow up to be a powerful ally for Harry in his future adventures.
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.