They could offer him information. Goblins often have a deep knowledge of the magical world's history and secrets, which might be crucial for Harry's journey. For example, they might know about some hidden enemies or undiscovered spells. They could also give him advice on how to deal with certain magical creatures or situations that he is unfamiliar with.
Sometimes, new original characters are created in fanfiction to help Harry. These could be students from other wizarding schools who have unique skills. For example, a student from a school in a far - off land who has mastered a type of magic that is unknown in Hogwarts and uses it to help Harry in his fight against the dark forces.
Hermione could be a great help. She is very intelligent and resourceful. She could help Harry find evidence against Snape. For instance, if Snape is suspected of cheating in grading, Hermione could use her knowledge of Hogwarts' grading system and records to dig up proof.
Dumbledore, even if not in person, could have left behind some clues or resources that help Harry. Also, the Order of the Phoenix members who are still around and believe in Harry's cause. They have their own skills and connections that could prove useful. For example, Moody could teach Harry some advanced defensive magic techniques to use against the Ministry's security measures.
There could be a goblin named Griphook. In the original series, Griphook has some interactions with Harry, and in the fanfiction, he might play a more significant role in helping Harry.
You can start by looking on popular fanfiction websites such as Archive of Our Own (AO3). It has a large collection of Harry Potter fanfictions, and you can easily search for 'harry gets help' within the site. Fanfiction.net is also a great place. Just use their search function and type in the relevant keywords. Another option is Wattpad, although it has a broader range of content, you can still find some good 'harry gets help fanfiction' there.
In certain 'harry gets help fanfiction', Harry gets help from Neville Longbottom. Neville, who has his own growth and strength in the wizarding world, could offer practical help. For instance, Neville might share his knowledge of herbology that can be used in a defensive or offensive way. There are also stories where Harry is helped by Luna Lovegood. Luna's unique perspective and knowledge of the magical creatures and the less - known aspects of magic can give Harry an edge in his adventures.
The snake might use its ability to move stealthily. It could spy on the enemies for Harry Potter. For example, it can slither into hidden places where humans can't easily reach and gather important information.
One interesting plotline could be Harry getting help from a secret magical society that has been hidden from the wizarding world. This society might have unique spells and knowledge that they share with Harry to defeat Voldemort.
Well, often Harry could receive financial help from Gringotts in fanfiction. Since he has his parents' inheritance there. The goblins, who are known for their strict business ethics but also a sense of fairness, might provide him with enough gold to buy rare magical items or hire the best tutors to improve his magical skills.