What are some interesting plot ideas for Harry Potter fanfiction involving Sirius as a puppy Animagus?

One plot idea could be that fem Harry Potter discovers a hidden prophecy that involves Sirius Black and they have to work together to figure out what it means. Along the way, they face challenges from dark wizards who also want to get their hands on the prophecy.

In a 'Harry Potter meets Sirius Black fanfiction', it could be interesting if Sirius and Harry found a way to time - travel. They could go back to the time when James and Lily were alive. This would not only allow Harry to meet his parents but also give Sirius a chance to change some events that led to his downfall. They might also interfere with the actions of Voldemort in the past, creating a whole new timeline and a different future for the wizarding world.

One idea could be a crossover where Harry and Neville end up in the Naruto universe. They could learn chakra techniques and use their magic in new ways. For example, Harry might combine his Patronus charm with a chakra-based attack. Neville could use his knowledge of Herbology to discover new medicinal plants in the Naruto world.

One idea could be a crossover where Pietro uses his super speed to deliver important Hogwarts letters that the owls can't manage in time. Another could be that Pietro accidentally enters the wizarding world and has to learn magic while Harry helps him adapt. Maybe Pietro's sister Wanda also gets involved and her magic interacts in strange ways with the Hogwarts spells.

One plot idea could be that Urahara Kisuke somehow ends up in the Harry Potter universe. He might use his unique inventions and skills from the Bleach world to help Harry and his friends in their fight against Voldemort. For example, his kido skills could be translated into new spells in the wizarding world.

A plot could be about a student who has a phobia of large groups (agoraphobia). At Hogwarts, there are always big gatherings in the Great Hall, Quidditch matches, etc. This character could struggle to attend these events. Their friends could try to help them gradually face their fear, and in the process, they might discover a magical solution or just the power of friendship to overcome it.

One idea is that a dark wizard targets Remus Lupin and Sirius Black because of their close relationship with Harry Potter. The fanfiction could focus on how they protect themselves and Harry, and how this situation brings out new aspects of their magical abilities and their bond with each other. They might have to seek help from some unexpected allies within the wizarding world to survive.

A possible plot is that Sirius Black gets a tip - maybe from an unexpected source like a house - elf - that Harry Potter is being lured into a trap. Sirius races against time to reach Harry. When he does, Harry is in a wizarding duel with some powerful dark wizards. Sirius jumps into the fray, using his own powerful magic skills. He manages to deflect the dark spells aimed at Harry and then they both apparate away to safety. This could lead to a deeper bond between them and also new revelations about Sirius' past that help Harry in his fight against Voldemort.

In a fanfiction, Sirius as a puppy Animagus might have a special bond with Harry's Patronus, which is also a stag. Since he was Harry's godfather, this connection could be explored in a really interesting way. For example, the puppy Sirius could be drawn to the Patronus and they could communicate on a deeper level, perhaps sharing memories or emotions that are unique to them. It could add a whole new layer to the magic in the Harry Potter universe.

One plot idea could be that Amelia, a new character in the wizarding underworld, teams up with Harry Potter to expose a dark magic ring operating there. They might face challenges like hidden traps and double - crossing allies.