This is based off a Tumblr post by "ohdeerjily" and all characters belong to J.K Rowling.
"Fred, George?"
Harry hesitantly poked his head into the two older boy's dormitory. He didn't want to pry but Ron had long since passed out on the sofa before the fire and Harry was itching for a snow ball fight.
'Fred, George?"
He inched further into the room awestruck at what he saw. Canopy's on beds were nearly ripped off, on one wall was a complete map of Hogwarts and everything littered the floor, from muggle candy wrappers to broken quills and many many papers.
Harry tried his hardest not to step on anything as he med his way further into the room but it was impossible once his eyes caught the fake Ministry's Wanted Posters(Percy was pronounced number One on multiple accounts of spoiling fun and being a know-it-all, Finch was second with similar charges and thirdly was McGonagall for being too "badass")
There was a crunch below Harry's foot.
Like lighting Harry lifted his foot to see an old and batter folded sheet of parchment. He bent to pick it up hoping to fix any harm he may have caused but paused when he realized there was no writing.
Warning bells went off in Harry's head as he held the parchment in his hands, it seemed wrong somehow that the parchment had no writing when it looked like it had been handled many times.
"Maybe Fred and George hid what's really on here." Harry thought to himself as he fished out his wand from his pocket.
"Aparecium." Harry muttered to himself as he lightly tapped the parchment with his wand.
At once different types of writing began to begin to appear on the parchment.
Mr. Moony would like to know why someone would try such a simple spell on such complicated magic.
Mr. Wormtail would like to say that whoever tries to break into this complicated magic will fail.
Mr. Padfoot would like to ask what year someone is to better understand their stupidity.
Mr. Pong would like to tell this someone to stay out of the Marauder's business.
His face growing hot Harry whispered back "My name is Harry Potter and I didn't mean to pry." Before quickly trying to refold it and return it where he found it, but to his immense surprise the parchment responded yet again.
Let Mr. Prong to shares his immense joy that Harry Potter has found this. He hopes that Harry will find the contents of this parchment useful and use it a way that will make his father proud.
The smile that had been growing on Harry's face died quickly he miserably responded "Well it wouldn't know considering he died, you see."
The writing appeared again.
Mr. Prongs would like Harry Potter to know that while his father may be dead he is still looking out for him and is incredibly proud of him. Mr. Prongs hopes that Harry Potter knows his father loves him very much.
"Did you know him?"
Very well I'd say, answer Mr. Prongs
Like a brother, said Mr. Padfoot
We all did, said Mr. Moony
We all loved him, Mr. Wormtail
"Could you tell me about him?" Harry asked.
We'd love to...
Several hours later Harry laid in his bed crying. He didn't know if he was happy or sad or maybe a little of both but for whatever reason Harry Potter cried at each word The Marauder's wrote
Then the idiot decided to jump from the Gryffindor table into the herd of Slytherins-
"Oi Harry you up here." A sleepy Ron asked peering into his dormitory "Hey-Oi what wrong!" He examined when he saw Harry red and wet face.
"Ron come here there's some people I'd like you to meet."
Ron sat beside Harry as he said "Mr. Padfoot would you please tell Ron about the time my dad fell into the lake trying to impress my mother.
Certainly…
Long after Ron went to bed Harry grabbed the parchment from the bedside table.
"Goodnight Dad."
Goodnight Harry, read Mr. Prong's handwriting.