A Mugiwara Goes to Hogwarts

By: WhiteFang72

Disclaimer: I do not own One Piece or Harry Potter or any of the related characters. Also, this story takes place right after Skypiea in the One Piece universe and during the fourth book in the Harry Potter one.

Hello again. I just got back from Harry Potter land! I picked up a chocolate frog and Sirius Black's wand. It was Amazingly Awesome!

Note: I couldn't find where, exactly, the Slytherin common room is located within the castle walls, so I improvised on the imagery.

Another Note: Don't try any of these pranks at home! Fred and George are professionals. Plus, it would seriously be dangerous. Ye've been warned. ;)

...

Standing outside, a few days later, Usopp crossed his arms and sighed. He and the trio were all attending Care of Magical Creatures, but the Blast-Ended Skrewts they were supposed to be taking care of weren't the most hospitable of animals. Usopp, Hermione, and Harry were all in a group, but none of them had dared touch the Skrewt in the pen in front of them. To make Hagrid happy they all pretended to put their hands in the pen and coo at the nasty thing. The creature was apparently much larger than it had started out as and was sporting a wicked stinger angled up over its back. It had tough gray scales like armor plates. It also occasionally shot fire out of its rear end. Lovely. Making the giant man happy was really important to the others, so Usopp reluctantly played along and hoped he kept all his fingers by the end of the lesson.

He was so absorbed with trying not to be in the way of the animal's fiery farts, that he almost didn't notice Hagrid come up to them. The bearded man crinkled his eyes as he looked at the others, and spoke to them, asking how they liked the class so far and stating that he just knew that Harry would win the tournament, and that he'd learned about Hermione's progress in her classes and that he was proud of her. Usopp smiled to hear it. The man, despite being the size of a small giant, was more like a big, shaggy teddy bear than anything. Usopp had stopped being afraid of the man after only a few classes. In fact, after thinking about it, he realized that Hagrid actually reminded him of Chopper. Well, Chopper in his Heavy Point Form, anyway. There are some people out there that are just nice, no matter how scary they look. A wave of homesickness swept through him. Then Hagrid came over to him and clapped an enormous hand on his shoulder. Usopp tried not to stumble. "How are you gettin' on?" Hagrid asked.

Usopp shrugged, "Oh. Pretty well."

Hagrid shook his head at him, "Well, you tell me if you need anythin', alright? Any friend of them lots" as he indicated Harry and the others, Usopp inwardly cringed, "is a friend of mine too. An' you don't worry about that wand thing, alright. Everybody makes mistakes." As he said the last part, an unreadable look passed across his face, before he smiled at Usopp and left.

The words resonated in his brain for a while before he let them sink in. But when they did, Usopp felt a kind of warmth spread through him that he hadn't felt in a while.

With that feeling came a resolution. It swept through him, almost seeming to light his veins on fire. He felt himself stand taller. I've stood back and let things happen for too long. Its gotten me nowhere. The wand thing backfired yeah, but nobody would want a crewmember who just sulked all the time. Or one who just accepts his fate. I've gotta start taking back control. If I'm going to be a captain I can't let anyone, not even those who mean well, make my decisions for me.

Usopp glanced back at Hermione, Harry, and Ron. They were all occupied with talking to Hagrid. The class was winding down. He needed to be able to practice leaving the trio's presence, but still have an alibi for where he'd gone and what he'd done. I'm not a prisoner. They need to see that they can trust me. I also need to have some damn fun. Oookay, that last thought's a little more persuasive than the first two...

Usopp smiled as he noticed Fred and George walking by. He slunk off to meet them.

George, indicated by a large G on his sweater, waved at him as he came up. "Heya! I knew you'd eventually come around."

Fred said, "Fred and I are pained that you haven't come to see us in a while." He ended by dramatically putting a hand over his heart. He crumpled up his face in false agony. It sprung back to its normal mischievous look almost immediately. "So, care to try one of our products? Need a hex or a fake wand? In fact," he waggled his eyebrows, "you'd make a great beta tester. All you'd have to do is sign this form—"

George interrupted, "All the firsties are getting too scared, and after only one mistake," he sighed.

Fred continued. "We test them on ourselves first, so it's no great risk really. All you have to do is—"

"Sign this form." George finished, almost in a sing-song way.

Usopp laughed. "No thanks. I've heard what your testers go through. I'm not really partial to puking or nosebleeds." He waited for the twins to gain disappointed looks before he continued, "But I would be willing to help you find other victims."

"Ahhhh, we like your way of thinking," they both drawled, twin grins spreading across their faces.

Just then, someone else walked up to them. Usopp turned around to see that it was Neville. The boy looked like his toad had just been run over by a truck. Neville nodded at them before slowly asking, "What are you lot up to?"

Fred and George didn't miss an opportunity to try to hand out free samples, but after the boy reluctantly pocketed the products, Usopp had an idea. Neville had been paired with Pansy Parkinson, a Slytherin girl, all day, and her taunts had become more vicious the longer it went on. By the end of the day, Neville seemed more morose than usual. Maybe Usopp could cheer him up. "Hey Neville. We're going to go prank some people. Want to come?"

Fred and George both glanced at each other. They looked uncertain. Neville however, brightened. "Sure," he said. "That'd be..." Then he paused. "We...We won't get into trouble though right?"

Fred's eyebrows rose. Usopp smiled and poked Neville in the shoulder, "Not if we run really fast. It'll be fun."

Neville's brown eyes gained a determined sheen, "All right. I can cause mischief." As they began to walk off Usopp heard him whispering, over and over, "I can, I can."

Right before they turned the corner into the courtyard, Usopp whipped around and called out, "Hey, Harry, Hermione, Ron! I'm going with them, okay? See you at dinner!"

Their shocked faces made his day.

After eluding the trio, they all walked down the main hallway and debated what to do. Fred wanted to prank the entire Great Hall. His face went slack and misty as he thought about it. George rolled his eyes at the idea. "We don't have enough products to do that! If we ever do that, we do it so it'll be talked about for years."

Neville wanted a smaller target audience. "That way, we can get away from them easier," he said.

"Well, maybe we could pull something on just one house," Fred conceded.

Usopp rubbed his hands together, imitating a maniacal mad scientist. "Oooor," he held out the note, "we could prank some of the Slytherins' and Gryffindors'. Y'know. Just to be fair and all."

George abruptly changed direction. He started heading toward the grand staircases. "Well, if we're going to do that, we need supplies—"

"Good supplies—" Fred said.

"Like Fireworks." Said George.

"We'll also need to inform Lee," Fred announced. He glanced at his twin in a meaningful way.

Usopp split off for his own room, "I'm getting something too." They looked at him curiously, but he didn't explain.

Once everybody was prepared, they went down to the dungeons and settled right outside the dead-end corridor to the Slytherin common room. The lights there were dim and a greenish, spooky color. A couple of alcoves held rusting suits of armor with wickedly sharp weapons. Usopp, Neville, and Fred hid behind the armor, though the foul-mouthed things had to be silenced with a spell from George. George himself stood on his tiptoes at the corner of the wall and peeked over the side to see if anyone was coming. A few minutes went by. Then a few more. After a while, however, part of the lunch crowd showed up, and George gave them all a thumbs up before rushing back to his own spot.

"Okay," he cautioned. He was as serious as if he was directing a battle, "This is it troops. We throw it all at them, make a lot of noise, and then leave before anyone shows. Any questions?"

George didn't give anyone a chance to answer him as he said, "Now quiet."

Neville's knees were quaking, but the others seemed to take it for excitement rather than what Usopp suspected it actually was. Fred and George had commandeered the armor farthest from the corridor's opening and were holding out little bundles of sticks. Neville was positioned nearest their escape route and was holding only his wand. Usopp himself tried not to fidget next to the axe the armor nearest him was holding. It looked like it had been sharpened recently.

Silence reigned for a few seconds before the students showed up. Usopp caught a glimpse of students in Slytherin robes. He thought he recognized Pansy, Crabbe, Goyle, Malfoy, and oddly enough, Luna Lovegood from Ravenclaw, before George stepped out of his hiding place and called out, "Aim and fire!"

Bam! Usopp's smoke bomb and some firecrackers exploded out into the corridor, spewing a pale gas and flashing lightening all over the place. The firecrackers themselves let out some kind of steam that made the eyes water, so combined, it was pretty difficult to see anything but vague colors. Some students covered their mouths and coughed, while others glared in fury. Many were dodging spelled firecrackers that followed on their heels, lightly stinging them every time they moved. All of them were shouting insults at George, but they clearly weren't sure which twin had pranked them, so many called out both names for good measure. Some even started screaming at the entire Weasley family. Others limited themselves to, "You dirty Gryffindors'!" or "You'll be expelled for this!" Luna had found a way out of the mess, and was smiling in a partly amused, dreamy way as she tried to dispel the firecrackers.

Malfoy, unlike most everyone else, didn't seem to have seen George. He was shouting, "We're being attacked! Call the ministry! Call my father! Ow! Ow, ow!" His voice was quickly climbing into the region only dogs could hear. It squeaked every so often. He kept it up until he realized Pansy was shooting disgusted glances his way. Crabbe and Goyle didn't seem to know what had happened either. They were pointing and mumbling insults at Luna under their breaths.

Just as the smoke bomb was wearing off, and just as Malfoy and his cronies were discovering their mistake, Neville got into the game and pointed his wand. He mumbled something that was lost in the wake of Draco Malfoy's enraged shouting. A sharp popping sound rang out. Purple light seemed to drip from Neville's wand.

The purple light turned itself into glitter.

Glitter that swiftly appeared over the entire room, covering the students in gold and red sparkles. The Slytherins' shook themselves off in hatred. More than one was scowling. More than one also had glitter tickling their nose and falling from their hair into their eyes. Many were sneezing out clouds of red and gold. Malfoy and Crabbe were actually shaking their fists, which really didn't do anything but get sparkly stuff on their shoes and stuck in the hems of their robes. Luna Lovegood, contrary to everyone else, was softly dancing in the chaos.

A teacher's voice echoed faintly down the corridor's ahead. Usopp could hear an exasperated, "What is going on?"

Before someone could get a good look at anyone but George, the pranksters began running. Usopp looked back before they turned the corner. A couple of curses flew their way and hit the wall behind them. One began to eat through the paint like it was an acid. Usopp shivered and was glad he'd missed that one. He was gratified, though, to see that at least two Slytherin's, a dark-skinned boy and a scrawny boy he didn't know, were grinning and giving them the thumbs up. The scrawny one was hunched over, drawing a rude picture on the glitter that had fallen to the ground. Good to know that some of them appreciate fun.

He turned back around and ducked, along with the others, into another hallway. They could hear someone approaching, Professor Snape by the sound of it.

Neville's face flushed with pride. "Oh gosh. That was, that was so...Cool!" He paled a little as the voice got closer, "Now what?"

Both Fred and George were stealthily making their way through the hallway proper. Fred shushed Neville and motioned for him to hurry. He whispered, "That glitter thing was right clever mate!"

Fred chimed in, "Really clever!" He lowered his voice, "they'll be remembering that one for a while. That stuff isn't easy to clean off. We've gotta admit—"

"We underestimated you!" They finished.

Neville blushed and stammered "thanks." Fred went on to say, "I know of a shortcut to the kitchens, we can't get there from here, but we've got to hurry."

"Why? Why the kitchens?" Neville asked.

George answered, "Because they've got a visual on my face," he grinned in a half maniacal way, "So they'll be looking for us!"

Neville squeaked, "But that doesn't answer anything!"

Fred motioned them up the stairs to the first floor and off down a side corridor. Behind them, the professor's shouts became fainter. They stayed silent and tried to look natural until they were out of sight of everyone. Once down a somewhat deserted hallway, Fred shot a sideways glance at George, before nodding at Neville and Usopp. "He didn't want any truly nasty curses coming our way. Wish you would have told me you'd do that, though, brother o' mine. I would have prepared a better alibi. Jordan can only do so much."

Usopp thought about the prankster's words. Neville's full of surprises, but he might have freaked if one of the Slytherin's sent a darker curse, because of being too panicked. Come to think of it, I might have freaked too...

George shrugged and his grin widened, "Spur of the moment thing. 'Sides, it adds to the excitement, right?"

Neville interrupted in a whisper, "But why are we going to the kitchens?"

The twins both spoke, "To pull our other prank of course!"

By that time, they were all standing in front of large picture. In it were some sinister looking wizards surrounding an empty cauldron and chanting in rhymes. One of them asked, "The ingredients that are needed?"

Fred answered, "Eye of Kneazle,"

George said, "tongue of bat,"

"clippings of hair,"

"from a thieving rat,"

Fred let out a wicked grin, "knickers of Angelina,"

"or the toe-fungus of a ballerina," George glared at his brother.

Fred went on, "We won't tell anyone new,"

"this month,"

Fred opened his mouth, then closed it again. "What rhymes with month?" He hissed.

George shrugged, "that's your job." The wizard in the painting began tapping his foot. Usopp, mystified, suggested "oomph, maybe?"

"Right," Fred continued. "And for this to work, we'll need a little...oomph?"

The man in the painting was disapproving. He sniffed, "Bring a Ravenclaw next time." But the portrait opened.

It took a few more corridors to make it to the kitchens, but they managed it. Usopp wasn't sure what it was the twins asked the house-elves to put into the Gryffindors' food, but he was glad he wasn't going to eat it. He took a bite of his sandwich and laughed. I wish I'd thought of this earlier.

...

As soon as they got to dinner, Harry and the others abandoned their food and surrounded him. Hermione's voice was barely contained, "Where have you been?"

"Relax, little friend of ickle Ronniekins," Fred said, "He's been with us—"

"Learning the ways of the pranking kings—"

"Not that any can hope to match up to our greatness—" George said.

"But, alas. Many try..." Fred waved his hand in a vaguely Shakespearean way.

Neville tried to look at the staff table without showing it, "Do they know?"

Ron immediately looked suspicious, "Know what?"

Fred and George poked him. "Quiet brother. Yup. Looks like McGonagall's suspicious of us at least."

Usopp looked. The older witch had on a face like she'd swallowed a whole lemon. Professor Snape seemed likely to kill them within the hour. They were talking to each other in low voices and, unfortunately, pointing at the Gryffindor table. The other teachers were chatting excitedly. Usopp could hear the occasional phrase, "stinging firecrackers," "Gryffindor colored glitter," and "smoke everywhere," echoed around the staff table. Professor Dumbledore alone seemed unconcerned. He'd popped a couple of candies in his mouth and was excusing himself from speaking. He seemed amused, though, for which Usopp was grateful.

Usopp asked, "What did this Jordan person do to help out?"

Fred was about to answer when someone walked into the hall. That someone was rubbing his stomach and looking around shiftily. For a second nobody spoke. Then George put a hand to his head, "Lee," he yelled, "You were supposed to stay put until it wore off!"

Several professors' shouted, "Fifty points from Gryffindor," just as half the Gryffindor table turned into canaries. Along with the explosion of feathers came a contented smile to each prankster's face. Neville, for one, seemed happy simply because he wasn't one of the canaries. Well, probably also because he hadn't gotten caught. Fred and George seemed happy at pulling such a high-profile prank, even if detention loomed. Usopp knew he was happy, though.

I think I'll capitalize on this all I can. He smiled and toasted the trio with his pumpkin juice.

...

Authors Note: Oh, there will be more interaction between the characters, don't worry Silverchild of the winds. However, interaction between Harry, Hermione, Ron, and Usopp will have to wait until the end of the next chapter. Sorry...but that's just the way it worked out with what I'd already written.

Feel free to revew or critique if you like. Thank you so much for reading this!