Some of my favorite marauder headcanons; these are mostly from tumblr and I will give credit to the creator if I know who it is. Some are my own.

James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew have made it through their First Year at Hogwarts - but it's never a dull moment in the lives of the Marauders, and their Second Year promises to be filled with just as much adventure as the first. Join the Boys as they learn about loss and growing up in a world where Lord Voldemort's threat lingers... Be sure to start at the beginning with The Marauders: Year One! (https://www.wattpad.com/story/48200408-the-marauders-year-one-wattys2016) #Wattys2016

Moony. Wormtail. Padfoot. Prongs. Their adventures were the stuff of Hogwarts legend. But there are untold stories, stories that only the four of them know. Come along and discover the true tale of the Marauders of Hogwarts... #Wattys2016

The Marauders are starting their fifth year at Hogwarts; Remus is starting with a massive scar across his face - a byproduct of the increasing severity of his furry little problem, which is a definite cause for concern despite his insistence that it it's fine. Sirius is starting with the memories of a certain morning at 12 Grimmauld Place in August: memories that he might not ever forget, yet is desperate to cloak underneath the facade that every is fine at home and that he and his parents just sometimes encounter minor disagreements. James is starting his fifth year, yes, but more importantly, he is starting phase five of his plan to woo Lily Evans: somehow his friends seem doubtful that he might succeed, but James, being James, is in no lack of confidence. And Peter, well, Peter is starting to wonder just why he puts up with these people, and if he should really be feeling sorry for Lily Evans, and maybe if he should have asked to have been sorted into Hufflepuff.