One idea for such a fanfiction could be that Harry and Albus are on a mission to learn about the vampires in the Twilight world. They might be intrigued by the different rules vampires have there compared to the dark creatures they know in their own world. They could form an alliance with some of the 'good' vampires in Twilight, like the Cullens, and together they face a common enemy that threatens both the wizarding world and the vampire clans in Twilight.
In this fanfiction, it could start with Harry and Albus accidentally stumbling into the Twilight realm. They are immediately noticed by the vampires. At first, there is suspicion and tension. But as they start to communicate, they realize they have more in common than they thought. They could exchange knowledge, with Harry teaching the vampires some basic magic tricks (if possible in the Twilight lore) and the vampires sharing their secrets of immortality and enhanced physical abilities.
There could be a fanfiction where Harry and Albus from the Harry Potter world find themselves in the Twilight universe among vampires. Maybe Harry's magic could interact in interesting ways with the vampire abilities in Twilight. For example, his spells might have different effects on vampires than on normal creatures in the Twilight world. And Albus, with his great wisdom, could perhaps try to find a way to coexist peacefully between the wizards and the vampires.
It could be really exciting. Harry and Albus would bring their magical knowledge and skills. The vampires in Twilight have their own set of powers and rules. They might clash at first. For instance, the vampires' speed and strength could be a challenge for Harry and Albus to deal with. But eventually, they could find ways to work together. Maybe they'd team up to fight a greater evil that threatens both the wizarding and vampire worlds.
Regarding Albus Severus Potter and 'lemon' in fanfiction, the lemon might be used to create a contrast. Albus is from a very magical family with a lot of history. A lemon, which is a common object in the Muggle world, can be used to show the connection between the two worlds. It can be a reminder that even though he's a wizard, he has roots in the Muggle world too. Fanfiction writers might use this to explore his identity more deeply.
I really like 'Twilight's Unseen Tales' in the fanfiction world. It delves deeper into the backstories of the vampires that were not fully explored in the original books. For example, it gives more details about the lives of some of the minor vampire characters and how they came to be part of the vampire society in Forks. It also adds some interesting twists to the existing relationships between the main characters.
In Twilight fanfiction, the idea of Harry having 13 siblings might be a way to create a more complex family dynamic. It could be that there was some sort of supernatural event that led to so many siblings. For example, a vampire or a werewolf could have been involved in the family's past, causing an abnormal number of offspring. Or perhaps it's a new take on the idea of a large family in the Twilight world, where Harry's family is an outlier compared to the normal vampire or human families in the series.
There could be a fanfiction where Albus Severus Potter gets transported back in time to the era of his father's youth. He could witness the events that Harry went through first - hand, but also accidentally change some small things that have big consequences for the present time. He then has to find a way to fix the timeline without completely erasing his own existence.
One great fanfiction could be where Albus, as an apt pupil, discovers a long - lost spell. He spends countless hours in the library, poring over ancient tomes. His intelligence and eagerness to learn set him apart from his peers. He might use this newfound spell to solve a mystery within Hogwarts, like the sudden disappearances in the Forbidden Forest. This would show his growth as a wizard and his ability to handle difficult situations.
A happy family in the Twilight fanfiction could start with a human family that moves to Forks. They befriend the Cullens without knowing their true nature at first. The family has a daughter who is intrigued by the Cullens' mysterious ways. As time passes, they discover the truth but instead of being afraid, they embrace the Cullens. The two families start to have joint activities like picnics in the forest. The Cullens protect the human family from other threats in the Twilight world, and the human family provides the Cullens with a sense of normalcy and warmth that they have always longed for. Their bond grows stronger as they face challenges together, and they become a unique happy family in the Twilight setting.
Another idea for the fanfiction is that the Twilight characters start receiving mysterious packages through the 'Signed Sealed Delivered' service. Bella could get a package that has some old family heirlooms from her mother's side that are linked to a hidden vampire past in her family. This could lead to a whole new adventure for her and Edward as they try to uncover the secrets of the items.
One great 'Harry Albus Fanfiction' is 'The Next Generation's Journey'. It beautifully portrays the relationship between Harry and Albus, exploring Albus's insecurities and how Harry tries to guide him. It has a lot of heartwarming moments and well - written dialogues.
Well, he might bring his magical skills into the world of vampires and werewolves. Maybe he'd use magic to deal with the complex relationships between the Cullens and the werewolf pack. He could also introduce new magical elements to the Twilight world, like potions to counteract vampire venom or spells to protect humans from vampire attacks.