Disclaimer: I do not own Harry Potter or Teenage Mutant Ninja Turtles.

Story concept by SL-Wanderer

Life is never boring when you're a ninja, especially when your brother's Michelangelo. Mikey is known for being a fun loving guy, but he's also known for his competitions with Harry over some of the most ridiculous things.

"Ha! That's a win for Mikey" the turtle gloated, busting into a victory dance much to his younger brother's annoyance.

"Best 30 out of 33!" Harry challenged.

"You're on!"

"What're they competing over this time?" asked Leo, entering the living room.

"When have they ever needed a reason to compete?" Raph remarks, not looking up from his magazine.

"I believe they were playing a video game" said Hedwig. Enough said everyone knows those two would argue over video game scores for weeks if given the chance. "Apparently they tied and of course they couldn't accept that. So they've been competing in several smaller competitions all afternoon."

The brothers had competed in skateboarding, shuriken practice, arm wrestling, breakdancing, rock paper scissors, holding their breath, staring contest, thumb wrestling, and strangely enough yodeling.

"Alright why don't you two just pick one more contest" Leo suggests, standing between his younger brothers. "This is getting ridiculous you can't keep this up forever."

"Yeah Leo's right" said Harry. "We can't do this forever."

"Yes" Mikey agreed. "We need the ultimate contest!" So the brothers focused their minds on coming up with the ultimate contest idea. For the rest of the afternoon the pair suggested and ultimately rejected several different contest ideas, it wasn't until that night as the family ate dinner did the perfect idea come to them.

"Food challenge!" they shouted, jumping to their feet so fast they shook the table.

"Food challenge?" asked the others, all aware of what they had been up to.

"Food challenge" they confirmed.

"And what exactly does this food challenge entail?" asked Splinter, wanting to prevent the destruction of their kitchen. Realizing they'd yet to actually work out the details, Harry and Mikey huddled together and quietly worked out the specifics.

"Ok we got" Harry announced. "I have to create a dish so disgusting that not even Mikey can eat it.

"But of course we had to raise the stakes" Mikey adds. "If I win Harry has to clean my room for me."

"And if I win Mikey has to lend me his entire comic collection."

"Oh boy" Donnie groaned. "This is going to be trouble." And so began the epic battle between Mikey's iron clad stomach and Harry's nonexistent ability to cook.

"Alright Mikey" Harry said sinisterly, carrying in a large tray of what some might call food. "Slops on!" placing the tray in front of the turtle, Mikey was presented a pizza topped with flies, rotten cheese, slime from a sewer pipe, cockroaches, worms, fish eyes, spinach, tofu, and to top it all off barf flavored jelly beans.

"Oh god it smells unholy" Donnie groans, as he and the other spectators try not to barf from the sickening smell.

"Oh yeah I got this." But Harry spoke too soon as Mikey quickly devoured the rancid pizza, letting out a noxious belch upon finishing his meal.

"Oh yeah! That's a win for Mikey!" the turtle cheered, breaking out into a victory dance. "Never underestimate my iron stomach!"

"I should've just given Mikey the win" Harry grumbled, as he entered his brother's room. Mikey's room was a disaster area; the floor was completely covered in pizza boxes, comic books, magazines, dirty underwear, and Chinese food boxes. "When did we even have Chinese?!"

Harry spent the next hour attempting to clean Michelangelo's room but the more he cleaned the more layers of filth he seemed to uncover. After spending the last hour just trying to collect pizza boxes he was understandably starting to get desperate.

Ok Hermione once mentioned there was something called a cleaning charm. But then again I've never tried anything like that before maybe I shouldn't. Right at that moment a pair of dirty underwear fell on Harry's head. "Ok yeah magic it is." Having no idea how to actually perform the spell, Harry decided to simply wing it. Building his magical power while focusing on the word clean, he released a blinding burst of energy around the room. When the light cleared Harry was pleased to find that Mikey's room was starting to clean itself up. Satisfied Harry left the room, never noticing the strange glow around Mikey's underwear collection.

That night as the family slept, a scream echoed through the lair. Woken by the noise Harry, Splinter, Hedwig, Donnie, Leo, and Raph meet up in the living room.

"Who was screaming?" Harry asks, tiredly rubbing the sleep from his eyes.

"It's coming from Michelangelo's room" said Hedwig, pointing to the turtle's door behind which they can still hear the sound of screaming only this time paired with loud crashes.

"My son are you alright?" asks Splinter, knocking on Mikey's door. When he doesn't answer the ninja master decides to open the door, where they bear witness to the odd sight of Mikey being attacked by a horde of living underwear. At once the mutant members of the family turn their gaze on the resident wizard, who was currently trying and failing to look innocent.

"Harry" they groaned, Splinter stepping forward, forces the boy to look him directly in the eye.

"Harry, what did you do?"

"What makes you think I did this?" Harry asks, desperately trying to look anywhere but in his father's eyes.

"Just call it a feeling" he deadpans, as a pair of rabid underwear is sent flying out of Mikey's room curtesy of the turtle's nunchucks. "Explain, now."

"Well, you know how I had to clean Mikey's room. Well I tried to but it felt like it just kept getting messier. So I used my magic to clean the room. How was I supposed to know it'd make Mikey's underwear collection come to life?!" at this Harry looked past Splinter, to his brother currently battling the rabid undergarments. "Why do you collect underwear anyway?"

"I don't tell you how to live your life!" Mikey argues, stomping on a pair of tidy whities.

"Regardless of Michelangelo's…..unique collection, you must fix your mistake" said Splinter, also confused as to why his son would collect underwear.

"Hai Sensei" said Harry, bowing to his father before entering the room to face the manic undergarments. Looking around the room he was surprised to find the rabid underwear had disappeared. "Hello, Mikey's underwear collection. Where are you?"

Suddenly the lights went out and before Harry could do anything he was tackled to the ground, assaulted by the living underwear. His screams rang out from behind Michelangelo's door as Splinter, Hedwig, and the Turtles wondered if the youngest member of their family was alright.

"Do you think he needs help?" asked Donnie.

"I'm sure he's ok" said Leo skeptically.

"Oh God Help Me!" Harry screamed in terror.

"I do believe your brother needs help" Hedwig deadpanned.

"Yeah but he made the problem, so he has to fix it" Raph argued.

"Raphael, I agree that your brother should've been more responsible with his magic" said Splinter. "However it's clear that he's having trouble with this, we shall help him correct his mistake."

"But Sensei…." The words died in Raphael's throat as Splinter raised an eyebrow, daring his son to argue about this. Reluctantly Raph joined the other turtles as they opened Mikey's door to the sight of Harry being hogtied by the magically animated tidy whities.

"Help!" Harry begged. Coming to the wizard's aid Donnie uses his staff to bat away his brother's captors while Raph grabbed Harry, making a hasty retreat they rejoined Splinter and Hedwig in the living room.

"Ok we need a plan" said Leo, cutting Harry free of his bindings.

"And I think I know where to start" said Donnie, revealing he managed to capture one of the briefs. Heading into his lab Donnie places the underwear under a scope. "Ok first, Mikey really needs to wash these."

"Don't judge me!" Mikey whined.

"And from what I can tell, Harry oversaturated the cotton with magical energy"

"We get it, I screwed up!" Harry snapped, earning him a smack upside the head from Hedwig for being rude. "How do we fix it Donnie?"

"Oh we can't" seeing the desperate look on his little brother's face Donnie elaborated. "Only Harry can fix it. I don't know enough about how his magic works yet to do anything about it."

"Except I don't know how to stop it" Harry said matter of factually.

"Can't you absorb magic? You did it against Quirrelmort remember?"

"Oh yeah" Harry sheepishly rubbed the back of his head, he'd actually forgotten he could do that. The others groaned as they too realized that Harry had forgotten the full effects of his core's mutation. Activating his Blood Vein, Harry's hand hovered overhead as he was reluctant to touch Mikey's dirty underwear.

"Just do it" Raph groans, frustrated with the mess his little brother has caused.

"Oh I'm sure you'd be eager to mess with Mikey's laundry!"

"Alright enough!" Hedwig snaps, stepping in before Harry and Raph could really start to argue. With a sigh, Harry lowered his hand on the not so tidy whities, just as during his battle with Quirrelmort his Blood Vein marks spread out from his arm over the underwear. The young ninja could feel the magical bonds breakdown inside the threads as the energy was absorbed into Harry's body as the undergarment dropped lifelessly on Donnie's table.

"Alright that's one" said Harry, trying to wipe the grim from the underwear on his pants. "How many left?" he asked turning to Michelangelo.

"I've got 12 more pairs" Mikey replied, much to his human brother's disappointment.

"Seriously, why do you collect underwear?" Harry asked, for what felt like the millionth time. Getting tired of having his collection questioned, Mikey simply ignored his little brother and opened the door into the living room, where they saw the place being ransacked by the living underwear. Without even saying a word, Leo and Raph picked Harry up by his arms and threw him into the center of the mess.

"Go get 'em, magic boy!" Raph joked, as he and the others decided to watch from the lab doors.

"Oh man that's got to hurt" Leo laughed, as Harry found himself getting hit in the head by one of the brief using their elastic to swing the boy's broom like a bat.

"Dude, that pair's dry clean only" Mikey complained, as Harry kicked one of the savage undies into the sewer water before finishing it off with his Blood Vein.

"You guys can help at any time" Harry whined, but his family made no move to help, this was his mess and he was going to have to clean it up. So with a sigh of reluctant acceptance Harry continued to deal with his cottony foes, eventually after an hour of comedic slapstick incidents; one involving a hose, a training dummy, Raph's weights, and a rubber chicken (don't ask) Harry dropped to the ground exhausted but victorious.

"Well Harry, it seems you've defeated your creations" said Splinter, helping his son to his feet.

"Yeah, now I can finally get some sleep." Unfortunately his night wasn't over yet, as his father handed him a broom.

"Yes you can sleep, just as soon as you finish cleaning up this room."

"Burn" Mikey laughed, he quickly stopped laughing once Hedwig handed him a mop.

"I don't see why you're laughing Michelangelo. Since you'll be helping him" Hedwig instructed, much to the turtle's confusion.

"While it is true the chaos tonight was caused by Harry being irresponsible with his magic. None of this would've happened if you two had not let yourselves get too competitive" Splinter explained, before Mikey could argue. As the rest of the family returned to their rooms to sleep, Mikey and Harry got to work cleaning up the mess from the night's disaster.

"Ugh, feels like we've been at this for hours" Mikey complained.

"Yeah, your underwear collection's as messy as you" said Harry. As the brothers struggled to finish before sunrise, the pair decided to try something crazy….however they probably should've just tried to do things the old fashioned way.

"Harry! Michelangelo!" Splinter yelled, as he and the rest of the family saw animated objects running around the lair's living room, being chased by the aforementioned ninjas.

"Hey Master Splinter" Harry greeted sheepishly, before pointing at his brother who was currently wrestling with the now animated punching bag. "It was Mikey's idea!"

"Hey at least we aren't competing now, right Sensei?" Mikey asked hopefully, praying that their father would at least find solace in that. Before Splinter could say anything, the fridge wonder out of the kitchen, firing eggs at Harry as he struggled to use his Blood Vein on the dancing television.

"These boys are going to turn my fur grey" Splinter muttered, just loud enough for Hedwig to hear him.

"Believe me Splinter, I'll be right beside you" she said in agreement. "I'll be one plucked owl. But still at least they're not arguing over a game." Splinter only shook his head, as Mikey and Harry tried to force the struggling fridge back into the kitchen.

This story idea was given to me by a reader SL-Wanderer, hopefully I did a good job with it.

On a side note I have to admit I almost didn't get this done this week, I got hooked on the new Arkham Knight game somebody tell me I'm not the only one who thinks it's so freaking epic.