This story was my original idea for a Harry Potter/Batman crossover, but in the end i went with Cat's Cradle, which i think worked out better as a whole, because i only got this chapter done then it all just went downhill... in this Harley Quinn kills The Dursley's leading Harry on a path of vengeance against her but along the way his ideals begin to get corrupted leading him to loose his way.

The Harlequin's Kiss

A Harry Potter/Batman/Teen Titans Crossover

Summary: after the Dursleys won tickets for an all expenses paid trip to Gotham City, disaster strikes and Harry begins to get a new outlook on life.

Disclaimer: I do not own Harry Potter it belongs to JK Rowling and whoever else claims authority over it. I do not own Batman it belongs to DC and anyone else who claims authority over it. This fanfiction is made for fun and not for profit, no money is being made from this fanfiction.

Warning: This story has Grey!Harry and Character death, if this is something that you don't like then please do not read.

Harry Potter Timeline: Set post OOTP.

Chapter 1: A meeting.

Gotham City, what was the Boy who lived doing in a city far away from UK and the Order of the Phoenix? Simple really, he had been bought by the Dursleys to Gotham after Dudley had won tickets in a phone in competition. Dudley wanted to go for a chance to see Batman although Vernon scoffed at the idea of Batman.

Harry however wasn't overly bothered he was too busy grieving over the loss of his Godfather Sirius Black and was feeling resentful to everyone, but especially himself. Since returning to Privet Drive he had barely spoken to anyone and he had also hardly eaten even the small portions that he had to have due to the Dursley diet plan, as he called it.

The flight to Gotham had been quiet until the time the meals were served and Dudley threw a tantrum about his dinner being too small. That caused many a raised eyebrow from the passengers, Harry smirked slightly as he realised the Dursleys wouldn't be able to keep up the persona of a perfect family if Dudley acted like the spoilt brat that he truly was.

Harry spent the majority of the time thinking about the Voldemort situation and trying to think of a plan on how to beat him.

If he was to do anything remotely dark to fight Voldemort, Harry knew that Fudge would jump all over him and treat him as if he was the next dark lord and arrest him. He also could expect no help from Fudge simply because he couldn't trust him to do the right thing if the going got tough.

Harry knew that Dumbledore would frown on anything that was even Grey in the eyes of the wizarding world as he was a key figure for the light. Harry was not happy though everything that had happened to him had been through the manipulation of Dumbledore.

And worst of all Harry wouldn't be able to do anything to Voldemort with the self proclaimed light magic as his only weapon. He needed some bigger weapons.

--

The first of two weeks passed quickly for Harry, mainly because they ordered him to stay in the hotel room while they visited the sights… Harry didn't mind though it allowed him to plan. With some of the money he had 'borrowed' from Vernon when he hadn't been paying attention at the airport Harry had purchased a pen and small notepad. That was now almost full of ideas and notes on Voldemort, Death Eaters, Dumbledore, Fudge and the Order of the Pheonix.

It was getting late when the Dursleys returned with several bags filled with Clothes and Harry quickly stashed the notepad and pen under the sofa which he was forced to sleep on because Dudley had become that large that he required both beds in the second bedroom to be pushed together to fit his mass. Harry was still amazed at how he managed to fit in the plane to Gotham.

Harry sat and listened to Vernon go on for about half an hour as he said about ungrateful people looking at them with criticizing eyes and then threw a bag at Harry and ordered him to change. "Boy people are beginning to get suspicious about why you are never around so tonight we are going out and you will not say a word." He growled and Harry internally smiled and went in to the bathroom to get changed.

"Their perfect idealistic dream is being shattered by the people who aren't blind to their lies. This is slowly going great." Harry quietly laughed as he changed and tried to flatten his hair. (to no success) and walked back out to see the Dursleys were still getting changed. "I'm also surprised they managed to find clothes that would fit them." Harry chuckled under his breath as Vernon reappeared.

"Whats so funny boy!" He snapped and Harry shook his head.

"Nothing Uncle." Harry responded and his face quickly lost the smile.

"Good! Now this meal is with the person who ran the contract the Head of Wayne Industries, Bruce Wayne. Now I don't want you to mess this up boy this could be really big for us and I don't want any of your freakiness messing this up." Vernon ordered and Harry nodded all the while smiling internally.

'It doesn't matter if I don't do anything they will still mess it up. Vernon is probably going to try and do a business deal right there at the dinner table… probably has a contract all drawn up and folded in his pocket' Harry silently mused.

--

Needless to say Harry was indeed correct. Vernon about halfway through the dinner had started to talk about a contract between Grunnings the small time drill business and Wayne Industries… needless to say Wayne wasn't taking the bait much to the dismay of Vernon.

The meal ended on a slightly tense term but overall Harry was having a lot of fun watching his Uncle self destruct and try to maintain a good composure.

When the meal finished the Dursleys said their goodbyes and left, instead of waiting for the car that took them to the restaurant to turn up Vernon grew impatient and said that he had noticed a Taxi stand around the corner on the way in. they crossed the road and begun to walk along an alley when a person in a jester outfit jumped in front of them and pointed a gun at them. Harry took a step back in surprise and Petunia screamed and hid behind Vernon as did Dudley although his mass far exceeded that of his uncle. The figure laughed and Harry realised that she was mental and then it hit him who it was.

It was Harley Quinn, the cohort of the Joker.

Harry grimaced and placed and arm covering his mouth and his nose as he tuned out Harley speaking as she threw a small green bomb. A couple of seconds later it didn't explode but started to release green gas around the Dursleys and he watched in shock as they begun to laugh uncontrollably not even stopping to breath as they slowly suffocated with their own laughter. As they dropped and slowly became motionless and the cloud of smoke begun to disperse Harry heard only the laughter of Harley Quinn and saw that the Dursleys were not moving.

Kill the spare

Sirius falling through the veil

The motionless bodies of the Dursleys killed just moments ago.

Those three incidents remained locked in his head he closed his eyes so he didn't see the large smiles that were now prominent on the Dursleys faces.

But the images continued.

Cedric hitting the floor

Sirius disappearing in the veil

The Dursleys…

He may not have liked them but they were still family. The last connection to his family was taken away from him.

"Don't know why Mistah J wanted you and your family dead kid but what he orders, he gets." She smiled and raised the gun at him.

The wand was summoned from his pocket to his hand and Harry fired off a stunning curse to which she jumped out of the way and clapped.

"This is fun shall we continue playing?" Harley asked and Harry fired off several more spells at Harley who easily dodged them and then tried to kick Harry but his years of Quidditch practice as a seeker allowed him to roll out of the way in time. "Kid, your not supposed to fight back like this." She pouted and Harry just growled.

"You killed the last of my family!" Harry shouted.

"And I don't care kid." She responded and Harry lunged at her but she sidestepped and her elbow slammed into his back knocking him down on his knees. "Now be a good boy and die." She stated calmly and aimed the gun at the back of his head. It clicked once and the flag popped out she leant down and wrapped her arm around his shoulder waving the flag in front of his face. "Gotcha."

"Not so fast." Harry stated and grabbed hold of her arm and sloppily flipped her over his shoulder. She landed in front of him and kicked her foot up hitting him in the jaw and then flipping back to her feet and aiming the gun at his head.

"That's just not funny." She pouted and went to pull the trigger again.

A short whistling sound echoed through the semi quiet alley and Harley yelped in pain as a batarang hit her hand knocking her aim but the flag still shot out.

And into the arm of Harry piercing straight through it. "See what you made me do now!?" She shouted at the figure Harry couldn't see.

"I don't care. You will not kill another person." The figure growled and Harley looked startled.

"Hey cant we talk about this I mean does this really have to resolve to violence?" She asked and was then sent flying by a kick. Harry, still clutching his arm as he tried to sit up and see what was happening heard the distinctive sound of sirens.

"Well that's my cue, time to exit stage left." And with that Harley Quinn begun to run off and Batman gave chase.

The police soon turned up and Harry found himself being looked at suspiciously but was taken to the hospital when the paramedics turned up to deal with the injury in his arm.

TBC

Well here we go my alternate idea for a crossover although this one is a bit darker. Hope you enjoyed it as much as I did writing it.