Who helped siriuss create the secret document?

Sirius Black created the secret document with the help of his close friends, James Potter, Remus Lupin, and Peter Pettigrew. Together, they formed the Marauders during their time at Hogwarts and crafted the document known as the Marauder's Map, which detailed the layout of the school and the movements of people within it. Their collaboration was fueled by their shared experiences and adventures as young wizards.