AN: This contains major spoilers for DH, and takes place 25 years later. Albus Severus decides to time-travel back with his siblings and cousins to change the past, three times the Potters, three times the fun, right?

The Room of Requirement - 2020

"It's a good idea!" exclaimed Albus Severus Potter, looking quite thrilled from where he sat comfortably on an emerald green armchair.

"No it's not," said Rose Weasley crossly, who was just across the Room in a matching ruby-red armchair, "There are only about a million things that could go wrong—"

"We'll all be older, though," said Lily Luna Potter dreamily, "that'd be nice."

"Yeah," said James Sirius Potter enthusiastically, "Teddy can have his parents back!"

"It can't go wrong!' Hugo Weasley parroted his older cousin, the two of them were seated on the carpet in front of the fire. "A great idea!"

"See," Albus said, "you're the only one against it."

"I've seen pictures," Lily Luna went on, smiling at them all from her seat on the only beanbag chair in the Room. "Al looks just like Daddy did when he was 13, and Daddy looks like Grandpa James."

"See!" James exclaimed, sitting up straighter, "it's foolproof. We go back, nab Dad, go visit Grandpa—"

"— and destroy all the Horcruxes!" chorused Lily and Hugo together, grinning at each other.

"Exactly," said Albus confidently, "it can't go wrong!"

"Well I don't think I should go," Rose said huffily in a manner reminiscent of Percy Weasley. "I mean, someone has to tell Mum and Dad and Uncle Harry and Aunt Ginny what idiots you all are."

Everyone flinched at that.

"You can't tell Mum and Dad!" whined Hugo, beating the floor slightly with a hand, "You always ruin everything, Rose!"

"Remember the time," Rose began scathingly, "where you thought it would be funny to trick Scorpius Malfoy into thinking the Room of Requirement was his Common Room, and left him there for the whole day?" Rose's voice rose at the end of the sentence, very close to the way Grandma Weasley did when she was mad.

"Look, it was just a joke," James said weakly, "Scorpius was fine afterwards."

The Hospital Wing - 1995

"Stay under the Invisibility Blanket," muttered Albus Severus from where the five of them stood in the Hospital Wing, "I'm the only one who comes out, remember?"

"Muffliato," James pointed his wand at Madam Pomfrey's office, "Alright— go."

Al tiptoed to the outskirts of the Blanket, careful to keep the others hidden, he threw off the corner, revealing himself to his 13 year old father and his 14 year old aunt and his 14 year old uncle.

"You what?" Aunt Hermione asked, sounding scandalized.

Albus looked embarrassed, "Time-travelled back 25 years to get Harry Potter— my dad— to travel back another 25 years to find James Potter and kill Peter Pettigrew?"

"This defies every single law for using Time-Turners—"

"Er, we didn't use one of those."

"We?" Harry asked, catching the slip-up.

Albus cursed himself, "The rest of your kids, and er— the cousins."

"Cousins?" said Ron, turning pale, "Who's cousins? I mean— who's your aunt and uncle then?"

There was the sound of a muffled scuffle from behind, and the other four children tumbled onto the floor.

"JAMES!" Rose shrieked, "I told you not to!—" Her voice died as she caught sight of her parents.

"Hi Dad," James Sirius waved from the floor, grinning.

It took a while to sort out, but in the end Harry agreed to go.

"Sorry you can't come Aunt Hermione," Lily said, "But this kind of travel barely recognizes Rose and Hugo as Potter kin, so I'm afraid you can't."

"So it only works with people related to me?" Harry asked, ruffling his messy hair.

"No, it works with anyone related to a Potter. Since Rose and Hugo are our cousins it works on them."

"I see …" Hermione's voice sounded half-strangled. It all went against, well, everything!

"Harry, can you hurt Snape for me when you get there?" asked Ron, from his bed.

"Ron!" exclaimed Hermione, the same time as Rose and Hugo had exclaimed, "Dad!", and James and Lily, who had exclaimed, "Uncle Ron!"

"How about just a bit?"

"After Albus told us everything he did, I don't think so!" Hermione said indignantly.

"He's still a git," Ron muttered, and Harry nodded in agreement.

Albus Severus placed a palm onto his forehead, "C'mon, let's get this over with."

"How about Lucius Malfoy?" Ron asked, "He's still a git 25 years from now, isn't he?"

The Great Hall - 1970

"So here are your lines—"

"Lines?" Harry Potter asked, clutching the folded parchment.

"Al's already memorized his," Lily Luna added helpfully.

"You didn't think we'd go back in time to encounter three nearly-identical Potters and not turn it into a prank?!" James Sirius demanded of his father.

"Er— I guess—" Harry started.

"Great!" James Sirius said, shoving Harry out from under the Blanket, "Go dad!"

Al followed his dad out into the Great Hall, where four unsuspecting, legendary Marauders were eating breakfast.

"I, James Potter, hereby claim this Great Hall in the name of Potters EVERYWHERE!" From behind Albus Severus Potter, lightning and thunder crackled mysteriously in the background as the sounds of four sets of feet pattered away under the Blanket.

Harry glanced briefly down at the parchment he was holding, feeling rather stupid. He took a breath, filling his lungs with air before yelling: "Bwahahaha! You cannot defeat the Power of Potter!" There was a moment where Harry was torn between horrid embarrassment and the desire to fall over laughing before Albus grabbed his arm and the two fled the Hall before disappearing under the Invisibility Cloak.

"I didn't do it!" squeaked the real James Potter from where he sat at the Gryffindor table, "I swear!"

"Why didn't you tell me about pranking the ENTIRE school?" demanded Sirius Black, after the laughter had died away.

"I didn't do it," repeated a terrified James Potter, "It wasn't me?"

"It sure looked like you," Professor McGonagall said haughtily, walking up to the Gryffindor table, "two of you, as a matter-of-fact."

This failed to amuse James, who was staring in horror at the doors where the two dopplegangers had fled after their announcement.

The Room of Requirement

"That was—" began James Sirius.

"A horrible idea?" offered Rose.

"No— it was hilarious! Did you see the look on his face? I almost died!"Albus laughed, and Harry found himself grinning too.

"Best prank ever!" Hugo's fist punched the air, as James Sirius collapsed onto the floor in fits of laughter.

"Honestly!" said Rose, her arm protectively wrapped around Lily Luna's shoulder. "Boys."

Lily Luna giggled, leaning into her older cousin's embrace.

The Gryffindor Common Room

"I don't know how it happened!" James Potter repeated for the 19th time to some stupid student.

Thankfully, he had not been punished for the prank he had not even committed, due to the prank being 'out of the reach of any third-year student', according to Dumbledore.

Frustrated and befuddled, James finally snuck out of the Common Room under his Invisibility cloak, intent on finding out who had done this.

He was just making his way by the portrait of a wizard being beaten by trolls when the two boys from earlier appeared from nowhere and pointed their wands at him.

There was a flash of light, and James Potter fell to the ground, the victim of a powerful Stunner.

The Room of Requirement

'Enervate," Albus Severus said.

"I end up with Evans?" James cried gleefully, "Score for me!"

Rose made a sound like a hissing cat at James but said nothing.

Harry tried very, very hard not to gag or choke on his own saliva.

"Great," James said, rubbing his hands together like a sinister villain, "now we go kill Peter, right? Knew I should have never trusted someone with a rat Animagus form."

"Are you kidding me?" James Sirius said, "I think you're missing the big idea here."

"And what's that?" Harry asked cautiously.

"There are three of you, basically," James Sirius said, as if it was obvious, "We have the amazing opportunity to terrorize the whole school with the Reign of Potter!" He cackled evilly, throwing open arms into the air.

"Muahahaha!" echoed Hugo.

Lily Luna giggled.

Rose Weasley sighed again, "Boys."

The Transfiguration Corridor

"I am one of the three mighty Potters!" cried James, quite enjoying the terrified looks on the faces of the students in the corridor. "Face me if you dare!"

"Potter, stop being an idiot," said Lily Evans angrily, "We know it's you!"

James eyed her with a superior smirk, "You won' be saying that 25 years from now, Evans—"There was a loud 'SMACK' as Lily's hand made contact with James's face, causing the latter to stumble and fall onto the ground.

"Not so high and mighty now, are we Potter?" sneered a snooty blonde from the window. It was Lucius Malfoy.

Suddenly, a blurred figure leapt out of nowhere and slammed Lucius Malfoy to the ground.

"That was for my dad—" howled the red-headed boy, before disappearing with out loud, "eeek!", and a burst of light.

"That kid looked like Fabian Prewett!" shouted a sixth-year student.

"No, he had red hair— it was Arthur Weasley!" said another.

Everyone looked at Molly Weasley, who was related to one and dating the other.

"I don't know!" she said, looking just as confused as anyone.

"I'm bleeding here," James wheedled, clutching his face and broken glasses.

Suddenly, another James Potter appeared.

"Nice try, Evans!" the boy crowed, picking up the … other James Potter.

Then they both disappeared in a sudden burst of light.

Everyone looked at Lily Evans, who looked furiously at the spot where the two Potters had vanished.

"Boys!"

The 5th Floor Corridor

"Thank Merlin for Notice-Me-Not Charms," panted Albus, who was half-carrying the whiny James with Harry.

"I told you it wasn't a good idea to antagonize girls," said Rose, glaring, "and you—" she turned her icy glare on Hugo, "—what were you thinking? You could have ruined everything."

"Hugo's attack on Lucius Malfoy was funny," Lily Luna argued.

"Yeah, funny until the school starts a betting pool on who's double shows up next," Harry said sarcastically, "I thought we were here to fix things, not make them worse?"

"We will," James Sirius said offhandedly, "Just a spot of fun, that's all."

"A spot of fun?" James groaned, "Evans slapped me! That's not supposed to happen!"

"You were acting like a git, and Al had to rescue you," Rose noted, exasperated."Lucius Malfoy is a git!" Hugo interrupted, "Why is it bad I hit him but not that Grandma hit Grandpa?"

"Hey, hold off on the 'grandpa' thing," James complained, "I'm 13, not— not 80!"

"Well, what are we supposed to call you? We already have a James," asked Lily Luna.

"I was first," James argued.

"Enough with the arguing!" Harry interjected, "Let's just make Pettigrew fall off his broom or something and get to the Horcruxes already!"

"Exactly!" Rose said hurriedly, "Let's go before one of you is mistaken for someone else!"

AN: That's it for this chap! Please review if you like it!