AN: Good evening ladies and gentlemen! Here is the first chapter of Harry's first year at Hogwarts. What sort of mayhem will he cause? Read and find out!

Disclaimer: I don't own anything from the Batman universe, that is the property of DC Comics. Harry Potter and all related things belong to J.K. Rowling.

A small figure ran across the rooftops of Gotham city, a similar sized form quickly following after it. The first form jumped over the gap between buildings, leaning forward slightly when it landed to keep its balance, and continued to run. The second figure kept close to the first, mirroring its movements over the gap. The two passed near several streetlamps, illuminating their forms: the first figure wore a purple straitjacket with black straps over a black jumpsuit, a pair of goggles over the eyes and a dark green mask covered the mouth and nose; a curious trait was that this person had vibrant, green hair.

The second person wore red vest with green shirtsleeves, an ‘R’ on the left side, along with green boots, gloves, and shorts, and with a short yellow cape; the person wore a black domino mask on their face, the eyes narrowed in concentration.

The first person flipped over another gap and tossed something at the other; the second person dodged to the side, avoiding the playing card shaped projectile, before throwing something as well. The first person also dodged the thrown object, shaped like a bird, before perching on the edge of the building, he tilted his head slightly in amusement before speaking, his voice slightly muffled by his mask, “As much fun as this is, Robin, I have plans in the morning, so I’ll have to cut this short.”

“I don’t think so, Prank,” Robin responded, charging forward across the rooftop.

Prank cackled as the two traded blows and dodges before his ears picked up a sound, ‘Music? Not that I’m complaining, but it’s perfect to make an escape!’ Prank dodged another punch and, after giving a quick mock salute, flipped off the building.

Robin made the edge in time to see Prank slip into another building where he saw flashes of multicolored lights, ‘You got to be kidding me…’ He jumped off the building and slipped through an open window that Prank had apparently gone through, wincing at the loud music he was blasted with, ‘Just my luck, there’s a rave right next to us. I’ll never be able to find him in this!’

From deep within the crowd of people, Prank looked up to where Robin was perched, a wide grin underneath his facemask. “See you around, Birdie,” he murmured as he turned and slipped through the swarm of people who did not glance at him twice, this was Gotham and it was also a rave, as long as you were wearing something, not one would bother you. Prank glanced around the crowd, to see if there was anyone he knew hanging around here; he was not completely surprised to see a group wearing clown makeup dancing a few feet away from him, “Note to self, try and convince mum and dad to have a rave for my birthday…no drugs, of course.”

—HJH—

Minerva McGonagall, made her way to the office of Albus Dumbledore, “Albus, you told me to come to you when I was to about to send out this years letters; is there a reason?”

“Yes, Minerva,” Dumbledore responded, “It’d be best if someone personally delivered a particular letter because while the recipient had magical parents, they have lived in muggle world all their life.”

“Who are you referring to, Albus?” McGonagall asked.

“Harry Potter,” Dumbledore responded.

“…you’re joking; I will not be going to Gotham!” McGonagall argued.

-Five minutes later-

McGonagall sighed; looking at the greenhouse before kicking aside the Portkey Dumbledore had put in her hands. She inwardly cursed Dumbledore and raised a hand to knock, ‘Well, this is as good a place as any to start looking…I’m going to throw away his entire supply of lemon drops when I get back!’

The door opened to reveal a woman who, were it not for the modest covering of foliage, would be naked, “Can I help you?”

“I’m looking for Harry Potter,” McGonagall responded and quickly added, “I will not kidnap him, I assure you.”

“…you try anything to hurt him, I’ll track you down and feed you to my plants,” Ivy threatened.

—HJH—

Prank slipped quietly into an abandoned warehouse, far away from where the impromptu party was being held. He looked around cautiously before being suddenly bowled over; he flailed his arms in surprise, before attempting to push off the hyena that was on top of him, “Jin, down, get off!”

“He’s excited to see you, hun,” Harley remarked, pulling the excited creature off, “and turn your hair back, I like it better that way.”

“Sure thing, mum,” Prank responded, as his hair changed from green to black.

“That’s better, Harry,” Harley smiled, giving him a brief hug not remarking on the sudden color change, she had seen it often enough that it was normal, “How was your night?”

“Just the usual: I wandered around the city, ran into Birdboy, and lost him by ducking through a rave,” Harry recounted.

“What did I tell you about those?” Harley said.

“I didn’t take anything from anyone, mum,” Harry cut off, “Since it's my birthday today…can I have a rave, no drugs allowed?”

“Let’s ask puddin’ I think he had something else planned today,” Harley answered.

Apparently Joker did have something planned; he had set up for weeks a special present for Harry: a building to be blown up cued to tune of ‘Happy Birthday’ along with a massive display of fireworks. The ‘party’ itself was spectacular, a swarm of Jokerz had shown up to celebrate, were thrilled at the explosion, and had fun when Harry decided that the cake was better to throw than eat.

Several blocks away, McGonagall had felt and seen the explosion, ‘I just hope Harry wasn’t anywhere near that.’ After a chat with Poison Ivy, and a few cups of herbal tea, she had been sent to seek more information at the residence of someone called the Riddler. A little while earlier, she had seen a man apparently suddenly freezing objects as he fled from a long black vehicle and as the two had passed, she quickly came to the conclusion that the city was completely and utterly mad. As she made her way to where the Riddler resided, she ran into a woman dressed in a skintight outfit, “…would it be presumptuous to ask if you know a Harry Potter?”

“How do you know the kitten?” Catwoman answered.

—HJH—

“Hey, Ze’ev, my letter should be arriving soon, right?” Harry asked, holding Jin in his arms as Harley drove insanely to avoid the police that had shown up.

“I believe so,” Remus answered, idly compensating his posture whenever Harley made a sharp turn to make sure he did not fall over, “Should be arriving any day now.”

“Just don’t bite my ears or face,” Harry commented as Jin tried to groom his hair, or at least eat the small pieces of cake still stuck in it,

“I’m still amazed that he actually understands you,” Remus stated, watching as Jin licked the edge of Harry’s hairline and nibbled at the hair, “Why do you let him do that?”

“Because he wants to,” Harry responded, “It feels kind of nice, you should try it sometime.”

“I’ll stick to a brush and comb, thank you very much,” Remus said with a grin.

“Your loss,” Harry replied, giggling as Jin licked his ears, “Cut that out, it tickles!”

Remus noted that Jin seemed to truly understand the words Harry was saying instead of the general message most animals would get, ‘Maybe the two of them have become bonded? I have to check later.’

After causing some more mayhem during their escape, Harry, Harley, Joker, and Remus walked into the hideout to find someone knocked out and tied to a chair.

“…what’d we miss?” Harry commented with a laugh.

“Oh no…” Remus groaned, seeing who the person was.

“You know them?” Joker asked, coming around to get a better look.

“She’s a teacher at Hogwarts, Professor McGonagall,” Remus answered, “Harry, you need to change into some normal looking clothes, it wouldn’t be good if she reported back that you’re involved in crimes.”

“Roger!” Harry did a mock salute before running off to his room to change.

“Do I need to change?” Harley asked.

“No, she knows what you look like, it’s a bit of a tricky thing to explain, I’ll do so later,” Remus answered.

“Your disguise looks fine, you can just pretend to be one of our henchmen,” Harry remarked to Remus as he ran back into the room, finishing pulling on a plain red colored shirt and adjusting his glasses.

“McGonagall is no fool, but let’s hope for the best,” Remus answered, adjusting his wolf mask before grabbing Joker, “She can’t see you.”

“Why not?” Joker asked, pouting slightly.

“She only knows that Harry lives with Harley, and that he knows you. If she reports that Harry lives with you and considers you his father, he’ll be taken away,” Remus explained as he dragged off Joker into the shadows, watching as Harley and Harry carefully got the other henchmen to wake up McGonagall, and also keeping an eye on Joker to make sure he did not do anything stupid. The moments that happened after McGonagall was untied then woken up is a bit of a blur, but it culminated with the henchmen who had tied her up in the first place being berated quite scarily.