Recommend some good 'sirius black x james potter fanfiction'.

A very popular one is 'Marauder Mayhem'. In this fanfiction, the author does an excellent job of depicting the mischievous nature of Sirius and James. It's filled with their hilarious pranks, their loyalty to each other, and also their growth as characters as they face different challenges at Hogwarts.

One great Sirius Black and James Potter fanfiction is 'The Marauders' Reunion'. It beautifully captures their friendship and the adventures they might have had. It's full of the mischief and loyalty that characterized them in the original series.

There's 'Sister of Black and Friend of Potter'. This story shows a unique perspective of Sirius Black's sister. It details her friendship with James Potter and how they navigate through the challenges in Hogwarts. The character development in this fanfiction is really well - done.

One common theme is friendship. They were very close friends in the original story, and fanfics often explore the depth of their friendship, how they support each other through various situations.

Friendship is a very common theme. Their bond is often depicted as something extremely strong and unwavering. They are shown to be there for each other no matter what.

There's 'A Different Kind of Love'. This fanfiction is really good at portraying the growth of their relationship. It begins with their early days at Hogwarts, just as friends, and then gradually shows how their feelings change over time. It has a lot of emotional moments, especially when they face challenges from the outside world, like dealing with the expectations of their families and the wizarding society.

You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics, and you can use the search function to specifically look for James Potter x Sirius Black ones.

A good James Potter and Sirius Black fanfiction should first and foremost capture their personalities accurately. James is often portrayed as brave, a bit cocky but with a good heart, and Sirius as the wild, rebellious one. The story should also explore their deep friendship. For example, showing how they support each other through tough times at Hogwarts. And it should be set in the rich world of Harry Potter, with references to magic, Hogwarts, and other elements of the wizarding world.

Yes, there might be some out there. You could try searching on popular fanfiction websites like Archive of Our Own. However, this kind of scenario is a bit unusual and might not be as common as other types of fanfiction within the Harry Potter fandom.

One great story is 'The Bond Beyond Friendship'. It beautifully explores their deep connection in a way that stays true to their characters from the original series. The author does an amazing job of depicting their relationship development over time.