Well, if his parents are ghosts, Harry might embark on adventures to find a way to make them more 'alive' again. He could travel to different magical places, like ancient tombs or forgotten wizarding castles, in search of a solution. His adventures would be filled with emotional moments as he struggles with the idea of having his parents in a semi - existent state. He would also have to face various magical challenges and enemies who might try to stop him from achieving his goal.
Harry could have adventures where he tries to help his parents' ghosts pass on to the afterlife properly. This would involve solving mysteries about their untimely deaths. Along the way, he'd meet other ghosts with their own stories, and they could join him on his quest. He might also find ancient spells that can interact with the ghostly world more fully during these adventures.
One possible adventure is that they travel to a different dimension. The goblin friend has a special ability to open portals, and they end up in a dimension where magic works differently. There, they have to find their way back while also helping the local magical beings who are being oppressed by a powerful entity. Or they could go on an adventure to a hidden island where a powerful magical creature lives, and they need to get an ingredient from it to make a potion that can save Hogwarts from a curse.
They could go on an adventure to find a missing magical artifact that has fallen into the Muggle world. Gibbs' skills in tracking and Harry's knowledge of magic could be combined to track down the artifact before it causes any harm.
He could go on adventures to discover hidden vaults within Gringotts. Maybe there are vaults that have been lost for centuries, filled with ancient and powerful magical artifacts. Harry could search for these vaults, facing various traps and puzzles along the way, similar to the challenges he faced in the Philosopher's Stone.
In the fanfiction, Harry with his custom wand could have adventures in the world of magical creatures. He could communicate with creatures that were previously unapproachable, like the giant serpents in the Forbidden Forest. His custom wand might have a special ability to understand and interact with these creatures on a deeper level. He could also use it to protect these creatures from those who would harm them, leading to a series of exciting and dangerous encounters.
One possible reason could be that he might feel abandoned. Growing up without them, he could resent the fact that they left him an orphan. He might think that if they were really so great, they would have found a way to survive and be there for him.
He could go on a journey to save Christmas. Maybe some dark magic has affected the North Pole and it's up to Harry to use his wizard skills and his newfound knowledge of the Christmas magic to fix things. He'd have to battle against dark elves or some sort of anti - Christmas spirits.
They could go on a quest to find a magical - technological hybrid artifact. The two of them would use their unique skills. Tony would use his tech to analyze the magical elements and Harry would use his magic to navigate through the enchanted areas they might encounter.
One possible reason could be a misunderstanding. Maybe he discovers some secrets about his parents that he misinterprets. For example, if he finds out they were involved in some dangerous or morally ambiguous activities in their youth that he doesn't fully understand at first.
One possible reason could be that he discovers some long - hidden family secrets that make him question his parents' actions or decisions. Maybe he finds out about some dark deeds in their past that he can't overlook.
In this fanfiction, Harry could have an adventure of uncovering the true power of Potter Manor. The manor may have been built on a powerful magical ley line, and as Harry explores, he discovers that the manor has the ability to amplify his magic. However, there are also dark forces that want to take over the manor for its power. Harry has to battle these forces while also learning how to harness the manor's power for good. He might also discover a hidden room with a prophecy about his future and the future of the wizarding world, which would set him on a whole new adventure to fulfill or change that prophecy.