Hello and welcome back to a new story! I read a bunch of Harry Potter meets avengers fanfictions and they inspired me to do this. Hope y'all enjoy my story!

Disclaimer: I don't own any of the Harry Potter characters and I don't own any of the Avenger characters either. I do own Harry's animigus form as my own original design so no copying it or making anything similar to it without my permission!

Planning it out

Harry and Ron were casually walking down the streets of Hogsmade. Lucky, the two managed to finish their homework for the summer. They had also managed to collect everything they needed for next term. Hermione was busy at the moment, but said she'd met up with the two boys at the Three Broomsticks.

"Got any ideas on what's gonna be the new gossip this year?" Ron asked Harry.

"I got one guess, that the Ministry will probably intrude in Hogwarts this year. Which sucks," Harry responded.

"yeah. So what do ya wanna do while we are waiting for Hermione?" Ron asked (anther question, yet again).

"I dunno. Maybe we could check out some books that have cool spells we could try?" Harry suggested.

"Yeah, we could do that," Ron agreed.

And without further-a-do, the boys were off.

(Harry POV)

I was looking through the different sections of spell books on the far side of the store. Pranks for beginners, Basics of non-talking spells, and so on. There was one book that caught my eye. It kinda hard for me to reach, but I pulled out my wand, pointed at the book, and muttered a spell. The book then came out of its shelf and flew down to my reach. I quickly grabbed it and blew off all the dust on the cover. How to become a Registered Animigus the title read. As I looked farther at the bottom of the cover the words You must be at the age of 17 or older, out of school, to preform anything said in this book. I frowned at the words. I was, after all, only a newly turned 15 year old. I muttered the same spell again and the book flew back to its place on the shelf. Maybe I could ask Sirius to give me a guide on how to become an unregistered animigus because after all, my father and himself were successful in the animigus transformation and they were both underage at the time. With nothing else that I saw that sounded interesting, I walked over to Ron.

"Nothing good on my part, you?" I asked Ron as I walked toward him.

With his back still facing me, he said, "Nope. Not even a single interesting thing in this place."

"Well I think I know what we can do, but let's get out of here first," I suggested.

"Okay," Ron agreed and followed me out of the shop. We walked over to the Three Broomsticks, ordered two butter beers, and took at seat at the least populated spot in the pub.

(Normal POV)

"So is it something you wanna tell me?" Ron asked.

"Yeah...do you wanna become an unregistered animigus?" Harry answered.

"I dunno, doesn't it take a while for you to master transformation?"

"Well yeah, but Sirius became an animigus around our age so why don't we give this a try?"

"I see where you're going. Will this be Hermione Approved though?"

"She probably will disagree at the beginning, but she'll come on to it, she always does."

"I wouldn't say always, but ok. Do you have a book or something on how to become an animigus?"

"Not right now, but I know Sirius, my dad, Lupin, and Peter made a book on how to become an unregistered animigus and I'm going to owl Sirius if he can lend it to me."

"He'll probably say you're just like your father wanting to become an animagus," Ron said I'm a playful tone.

"Oh shut up," Harry said half annoyed, half playful.

Just as Harry said that, Hermione walked in, got herself a butter beer, sat next to Ron.

"Hi guys. Finally finished getting all my books for school," she said with a sigh.

"Took you that long?" Ron asked sounding half confused.

"Well yeah, duh," Hermione said in a you-should-have-already-known-that tone.

Harry interrupted in the two's conversation and he told her about becoming an unregistered animigus.

"Harry, are you out of you're mind?! Do you even know how long it could take to fully transform?!" Hermione reacted.

"Well yeah, but Sirius was able to transform and he was near out age!" Harry said.

"Well I know I can't stop you for doing it," she takes in a deep breath. "So I might as well help you."

"Yes!" Harry and Ron said at the same time.

"But!" Hermione glared at the boys as she said it. "That means everything that goes wrong will be your fault. Promise?"

"Promise!" Harry and Ron said at the same time again.

After a while, the three left the pub, Hermione went back with her parents, Ron went back to his family, and Harry walked back to the Dursleys. Harry went strait to his room and wrote down a letter to send Sirius.

Sirius,

Me, Ron, and Hermione want to be animagi like you. Would you mind if we borrowed the book you and dad made a long time ago? You know, the one that tells you how to become an unregistered animigus. Maybe even you could teach us in the forest so nobody knows we are there. Please send you're answer along with Hedwig on her way back. Miss you very much.

Harry

Harry tied the note to Hedwig's leg, opened the window, and let her fly into the now Dawn skies. It wasn't until the day after the day he sent the letter, that he got a response from Sirius. Harry untied the new note from Hedwig's leg, unwrapped it, and it read:

Harry,

I am so happy that you have chosen to be an animigus! You really are a lot like you're father and that makes me really happy! I will be happy to lend you the book me and your father made at your age. I can also meet you there in the forest and I can teach you how to become an animigus too. I will available on Mondays and Fridays to seek out of this filthy house and get some fresh air. How about our first lesson on Monday, 8:00pm? Tell Ron and Hermione if they wish to join too. Miss you dearly.

Sirius

I large grin spread across Harry's face. He was gonna get animigus lesson for Sirius! He couldn't wait until Monday (which was only 2 days away)! He couldn't wait to tell Hermione and Ron! So instantly he started to write a letter to Hermione (whom he thought she would give the letter to Ron as well).

Hermione and Ron,

I have just received word from Sirius to meet him on this upcoming Monday at 8:00pm at the edge of the forest. If you are Hermione reading this please pass this information on to Ron by just retying this letter to Hedwig's leg and send her off to Ron. Hope you can make it and hope everything is well.

Harry

Harry sealed it, tied it to Hedwig's leg, opened the window, and sent her off to Hermione.

Hedwig had not come back until Monday morning, where there were two letters tied to Hedwig's legs. Harry untied one letter and opened it. It was from Hermione.

Harry,

I have some family things to do at 6:30pm and they won't end until around 7:30 and then I won't be able to get home until around 7:50. So I will try my best to make it. Oh and by the way I sent Hedwig with this letter tied to her other leg and I tied the one you sent to the leg it was originally on. If you are Ron reading this, please keep the one Harry sent with you and please retie this letter to where it originally was when you got it. This is for HARRY not you. Hope everything is well with you, Harry.

Hermione

Harry then untied the other letter, opened it, and it read:

Harry,

I got your letter, but I accidentally opened Hermione's one for you so sorry her letter is a bit crumpled up. I am free all Monday so I am sure I can make it. Just make sure that you show up first so that I know where I'm going in that forest. Hermione will probably turn up late (if you haven't read her letter yet, read it now), you know she's always got stuff to do. Hope everything is well with you. See you there and can't wait!

Ron

It's settled then. They were all going to show up, well maybe not Hermione, but she will just be a bit late.

Hi guys! Hope you like this story so far! Post me some reviews if you like this fanfic. If not reviews, no updates sorry. :( Because reviews keep me motivated to do stories. I also updated this chapter cause I saw some spelling errors, so sorry if you see an more spelling errors. See y'all in the next chapter then!