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

H.P. Timeline moved up to match TMNT (2012)

In a hidden dojo deep underground within the New York City sewers four anthropomorphic turtles face off against each other. The blue bandana, duel katana wielding Leonardo vs the orange bandana wearing; fun loving master of the nunchucks Michelangelo.

"Oh yeah Michelangelo is on the move!" yelled the ever fun loving turtle as he charged his brother chucks at the ready only to be stopped by Leonardo's counter attacks. Not one to go down easy the orange clad ninja quickly began bobbing and weaving around the oncoming sword strikes before escaping with an impressive backflip.

"How you gonna' stop what you can't even see?" questioned Mikey with a confidence smirk on his face, as he prepared to regain control of the match. However this was just the opportunity his opponent needed, for just as he came into range Leo made his move landing a solid blow to his stomach with hilt of his sword.

"Like that" answered Leonardo.

"Good one Leo" Mikey wheezed.

On the other side of the room another match was about to begin. On one side stood the highly aggressive, equipped with his trusty twin sai, the red clad turtle known as Raphael. On the other wielding a bō staff, wearing his signature purple was his genius brother Donatello.

"Alright Donnie, drop the staff and nobody gets hurt" said Raph as he lazily rolled his shoulders.

"Yeah right, that's what you said last time; and then you hurt me" his brother replied.

"Yeah well, less then I would have" countered the red clad turtle.

With the banter over Donatello went on the attack, his movements were quick and precise a testament to his years of training, as he effortlessly spun his weapon as he jabbed and swung as his brother, hoping to catch him off guard.

However Raphael was no amateur, clearly shown as he just as effortlessly read his brother's every move waiting for the right moment. Just as Donnie brought his staff up for an overhead strike, to his shock and horror soon found his weapon had be stolen by his brother.

"Should've dropped the staff?" asked Donnie shock still on his face.

"Should've dropped the staff" answered Raph as he broke the weapon over his knee before proceeding to beat them against his brother's shell.

With their respective defeat of Michelangelo and Donatello, Leo and Raph prepared to faceoff as their brothers sat at the side, their full attention on the match between their elder brothers.

Leonardo and Raphael have always had strong sense of sibling rivalry, constantly pushing each other to the edge, and this match was no different. The instant their brothers were clear of the sparring ring the sibling rivals charged each other meeting in a clash of steel. As Leo brought his sword down intending cut his brother's shoulder, Raph was quick to block and counter with jab of his sai to his brother's throat. Leo however was not about to go down easy and quickly dodged to the side before retaliating with spinning back-fist making contact with his rival's forearm as Raph blocked the attack.

Jumping back to gain some breathing room the brothers circled each other searching for an opening, known for his impatience it came as no surprise that Raph was the one to make the next move as came at Leo with a fierce assault, forcing him to remain on the defensive.

With the constant assault of attacks Leo was unable to stop his brother from disarming him of one of his swords. However during his attack Raph lost track of his footing giving Leo the opening he needed. Ducking under his next attack Leo was able to escape his brother with a sweeping kick to the legs. With the loss of his footing Raph was unable to knock away Leo's next sword strike costing him one of his sai, as it went sailing across the room.

As the siblings continued their match they didn't notice as two figures entered the dojo. One was a tall humanoid rat dressed in Japanese robes the master ninja Hamato Yoshi (a.k.a. Master Splinter), the other dressed in a hooded black ninja suit, was a young boy with messy head of hair, bright green eyes, and hidden just under his bangs was a faint scar shaped like lighting.

"Aw man, I missed most of the fight" whined the boy.

"Well next time Harry don't leave your' homework to the last minute" said Master Splinter slightly amused with the child's antics.

Seeing no reason to continue complaining Harry turned his focus to the fight just in time to see Raph trap Leo's arm in his sai before flipping him over his shoulder thus ending the match.

As Splinter walked forward to address the turtles, Harry went to the wall to collect his own personal weapon a tantō. After dismissing his older sons Splinter turns his attention to his youngest ready to begin their training.

Blade in hand Harry now finds himself surrounded by training dummies, only waiting for his sensei's order to attack.

"Begin!" and with that young ninja dashed towards the nearest target slicing its arm off. Without even slowing for a second Harry delivers a beautiful spinning back kick to the next dummy. As the young boy continues his training session Master Splinter signals to the turtles hiding in the shadows of dojo.

Unaware of his brothers' movements Harry flips over the final dummy's head slicing it in half mid-flip. Taking a breath the boy is surprised by a barrage of suction cup arrows, though his reflexes are impressive Harry is unable to dodge the arrows and soon finds himself covered in them. Exhausted and annoyed the young ninja turns to his sensei with a questioning look on his face. Why the sneak attack?

"Your technique has improved greatly my son, however you still only focus on the enemy you can see. You must use all your senses not just your eyes" Splinter answered aware of the boy's unasked question.

"Hai Sensei" Harry replied before following his brothers into the lair's living room.

Despite being located in the NY sewer system the lair is actually a rather comfortable place for this unique family with the living room containing a TV, video games, and a pinball machine along with the dojo the lair also contains: individual bedrooms, a furnished kitchen, and a lab/workshop for Donnie.

"So why were you so late to training today Harry" Leo asked his youngest brother as they approached the coach.

"Donnie gave me too much homework" replied the boy turning to the turtle in question his voice making his resentment obvious.

"Hey don't blame me for your procrastinating" replied the brilliant terrapin. "Besides what were you doing anyway?"

"That's not the issue here"

"You were trying to beat Mikey's high score again weren't you?"

Harry's silence said enough.

Shaking his head in frustration Donnie decided just to let the matter drop and headed for his lab. Happy to of avoided another boring lecture about the importance of homework Harry happily joined Raph and Leo on the coach as they waited for Mikey to finish making Dinner.

Later that night the family is gathered around the table eating a Mikey special the finest dish of algae and worms, a meal that while common for his family does make Harry eternally grateful Master Splinter always stored some human food for him. As Harry's focus turned from his brothers meal to tonight's celebrations he couldn't help but feel excited after all not only was it his family's Mutation Day; this was the day they were hopefully going to convince their father that they were ready to leave the lair.

"Happy Mutation Day!" cheered the brothers happy to celebrate the day their family began.

"Ah yes today is the day we began to form the unlikeliest of families" Master Splinter said nostalgically.

"Tell us the story Master Splinter" asked Mikey always happy to hear their origin story

"Michelangelo I've told this story man times already" thankfully before Mikey could start begging Raphael stepped in and prompted their sensei to tell the story.

So Master Splinter told the story of how, back when he was human stumbled across strange men and in the ensuing fight along with his four pet baby turtles was exposed to a strange glowing liquid they were carrying, and while the attackers did escape he was able to salvage a cracked canister with the markings T.C.R.I.

"So in a way it was that strange substance that gave birth to us" said Master Splinter as he presented the very same canister. "However it wasn't until four years later that our family was finally complete"

"I was returning home after an afternoon of gathering supplies. I was just a few blocks from home when I heard a faint cry coming from one of the active sewer tunnels. Recognizing it as the sound of an infant I decided to follow the cries down into the tunnels. The cries lead to a tunnel over flowing from the heavy rain and floating in an old basket was a baby boy wrapped in a worn out blanket. Not willing to watch a baby drown I dived into the water and rescued the child. From the name sown into the old blanket it was discovered the boy's name was Harry."

At this point said boy's thoughts took a different route. While he had grown up happy with the turtles and Master Splinter; Harry sometimes couldn't help but resent the people that heartlessly threw him away, like a piece of trash. The worse part was he could only assume it was his birth parents after all who else could've it been.

Choosing to burry those feelings Harry returned his focus to the present just in time to hear Master Splinter agree to let the boys leave the lair later that night. With that piece of good news the boys went their separate ways, planning to gather in the living room before heading for the surface.

Not knowing what to do while waiting for their departure time Harry decided to do one of his favorite things bother Donnie. Spotting Donnie's old metal analysis of the mutagen canister on his desk Harry couldn't help but smile as he reached for a strange metal ring hanging around his neck.

Flashback

There was a reason why Master Splinter decided to adopt Harry, and it wasn't just because he found him cute. You see, after he brought the baby boy back to the lair, the child became dreadfully ill. While normally he'd most likely sneak the child into a hospital there was one major problem standing in his way. Whenever the poor child began to cry or cough strange things happened, ranging from disrupting electronics to throwing random objects around the lair. It was clear that like them the boy would be feared should his power be discovered. Thankfully Donatello even from the young age of five was both very intelligent and observant. It was Donnie that noticed that nothing ever happened when Harry cried as long as he was near the mutagen canister.

After that discovery a piece of metal from the canister was turned into a necklace, and Splinter was able to nurse the boy back to health. Once he was healthy Harry was properly introduced and welcomed into the family, but on some level Master Splinter believed the child knew what was happening to him after all his first words to them was proof enough.

"Donnie!" the baby cheered while pointing and clapping for his hero.

Flashback End

Over the years and with lots of practice it was discovered to his excitement that Harry could still use his power while wearing the necklace; it just required conscious desire and focus. Though Donnie was just glad that as long as he had it Harry wasn't a living EMP.

Coming out of his memories Harry decides to leave Donnie to his work so with smile at his hero and genius brother's back, turns and quietly leaves the lab unaware that his brother was smiling at his retreating form.

"Surface Time!" cheers Harry and Mikey as they race into the living room to meet up the others.

"You're going into a strange new world, remember to exercise caution" says Splinter as he leaves his sons a few final reminders before their trip.

"Hai Sensei"

"Stick to the Shadows"

"Hai Sensei" and with that the boys head for the exit only to stop as they hear their father's next rule.

"Do not talk to strangers"

"Hai Sensei" reply the brothers as turn towards the exit once more only to again be interrupted.

"Everyone is a stranger!"

"Sensei" groaned the young ninjas eager to finally begin their trip.

"Good luck my sons" Master Splinter sighs finally easing up on his protective nature.

With that the boys rush out of the lair excited to finally see the surface. But just as they were pulling away from the lair they couldn't help but here their father's last words of advice echoing through the tunnels.

"Stay away from public bathrooms, they're filthy!"