How does Harry Potter's discovery of a baby phoenix in fanfiction affect the story's plot?

It could change the power dynamics. If Harry finds a loophole in a powerful spell or a rule, he might become more of a threat to the Dark forces. For example, if he can use a spell in a new way due to the loophole, he can better defend against Voldemort's attacks.

The discovery could create a new arc in the plot where Harry has to learn to master the power of Merlin's wand. It might be difficult as the wand could have its own will.

In some fanfictions, the Golden Phoenix can act as a messenger between different realms. It could carry important messages from the spirit world to the living wizards. This could introduce new elements to the plot, like warnings about impending doom or revelations about a character's true identity that was hidden in the spirit realm. So, it has the potential to really shake up and expand the plot in various ways.

Hedwig becoming a phoenix would likely have a huge impact on Harry's journey. For one, her new form would give her enhanced abilities. As a phoenix, she could fly faster and carry more important items for Harry. This would help in his quests and battles. Also, phoenixes are very wise creatures. Hedwig could offer Harry more advice and guidance. And her presence as a phoenix would be a symbol of hope for Harry in his often-dark journey. It would give him more confidence knowing he has such a powerful and magical friend by his side. Moreover, in the wizarding world, phoenixes are respected and feared. Enemies might think twice before attacking Harry if they see Hedwig in her new form.

It can make the plot more focused on recovery and justice. The story could revolve around Harry getting the help he needs and the search for the abuser if not already known.

His anger could drive him to take risks he wouldn't normally take. Maybe he decides to go after a powerful enemy on his own without proper backup because he's so angry that he doesn't think clearly. This could put him in great danger and also change the course of the story as the other characters then have to scramble to save him.

Well, in many fanfictions, the bond with a phoenix can enhance Harry's magical abilities. The phoenix is a very powerful magical creature. Its magic might seep into Harry, making his spells stronger. For example, his Patronus could become more powerful as the phoenix represents hope and renewal, which are strong elements in Patronus magic.

The protective brother can change the plot significantly. For instance, if he's highly skilled in magic, he can prevent Harry from getting into some of the dangerous situations he faces in the original series. He might be able to stop Harry from entering the Triwizard Tournament by interfering with the Goblet of Fire's magic. This would then change the entire course of that year at Hogwarts and Harry's relationship with Cedric Diggory and others.

The pet might cause trouble for Harry. Imagine it has a mischievous streak and keeps getting into places it shouldn't be, like the Slytherin common room. This would lead to all sorts of awkward and dangerous situations for Harry, forcing him to come up with creative solutions to get out of trouble.

The phoenix could give Harry a sense of purpose. Knowing he has such a powerful and magical creature by his side, he might feel more confident. For instance, he could be more daring in his adventures and face his enemies without as much fear.