Okay, here's the long-awaited finale of "Mistakes"! This is honestly the first day I've been well in a week, so now I can finally start writing. Warning: There is a lot of character death in this chapter, so be prepared. What else do you expect when Dan's on the rampage? Anyway, I think I've ranted enough, so without further ado…

Note: The magical weapon is not mine. I borrowed it from Sliverlocke980

Both Harry and Danny floated in shock. Harry knew Dan was powerful, but if he could actually decimate a city… even with this new weapon, he might not be able to win. Clockwork and the others were trying to fight him off, with little success. "Okay, we don't have any time to waste." Danny insisted. "It's either him or me this time." He sped him and slammed into his side, not wanting to waste any more time, only to be thrown away.

"It took you long enough." Dan smirked. "You like what I've done with the place, Danny? Funny thing about wizards: They don't provide nearly as much entertainment."

"You aren't getting away this time." Danny growled, punching him in the gut. "You'll pay for killing my sister, you'll pay for what you've done, and you'll pay for even existing!" Danny launched a flurry of punches, surprising Dan with their ferocity. He merely waited for his younger self to leave an opening, and he delivered a devastating counter-punch.

Only to be blasted by Harry. Turning around, he grinned when he saw Jack, Maddie, Valerie, Tucker, Sam, and what remained of the Order, all glaring at him in hatred. "Be careful." Fright Knight advised. "We don't know what his powers entail."

"Shut up, ghost!" Jack exclaimed. "I'm not taking orders from you!" He charged forward, guns blasting. Dan dodged smoothly, only to be kicked into a building by Danny. They continued to fire, but few shots impacted, and those that did Dan easily deflected.

Clockwork flew over and did everything he could to protect the crowd from Dan's shots. Grinning, Dan took off and slugged Clockwork across the side. Not wanting to waste time, he created claws and stabbed him in the chest. Fright Knight moved to intervene, but Dan barely gave him a glance before blasting him aside.

"No!" Harry exclaimed, charging up a magical blast. When certain of his shot, he let it fly, sending Dan to the ground. Everyone, including himself, was shocked by the size of the crater. They weren't foolish enough to believe it over, though. Their beliefs were proven true when Dan reappeared, a little worse for wear, but not seriously harmed.

"Well, it could be that I've finally found a few adversaries worth fighting." he laughed. "Let's see what you can do." He extended his hand, beckoning them forward. Danny, Danielle, and Harry gladly took the chance, the others following cautiously.

Jack and Maddie opened fire, trying to nail Dan with the new weapons. However, when one came within a couple inches of hitting Danny, they decided to try something new. James, Lily, and Sirius charged up their energy and fired it, sending Dan back. It wasn't nearly strong enough to hurt him, though. He returned fire with his ghostly wail, forcing them to duck for cover. Harry was caught in the blast, though, and even his shield didn't fully repel it. Danielle flew to rescue him, but stopped once she saw it wasn't necessary.

It stopped after several seconds, all of them badly shaken. There didn't appear to be any fatalities. Wulf and Dora headed towards Danny, ready to attack Dan again, who had gotten bored and began to destroy the nearby buildings.

"I've had enough of him!" Valerie growled. "It ends today!" She charged up her jet sled and flew forwards, Clockwork covering her. He believed her attack to be rash, but they had nothing to lose at this point. Harry had beaten her to it, though, and was currently grappling with Dan

Dan threw his fist, which Harry dodged and followed up with a massive magical attack. Momentarily stunned, Dan flew to the side, where Danny and Wulf were waiting for him. Danny fired a ghostly wail of his own, stunning him further, and Wulf unsheathed his claws and tackled him.

Dan was far from defeated, however. He grabbed Wulf by the neck and charged up dark energy. Danny flew to rescue him, but he was too late, and Wulf was destroyed. Furiously, Danny charged forward, only to miss and be grabbed by Dan.

"And they call you a hero." Dan laughed. "You can't even save the ones you love, like dear little Jazz. I only wish I could have heard her thoughts, to hear the pleading for her life." He licked his lips in satisfaction. Danny charged up ectoplasmic lightning, but Dan saw it coming and impossibly, got out of the way. Danielle managed to land a few punches, but they did almost nothing.

Danny turned around only to receive a foot to the head. Maddie blasted Dan into a building, giving her son time to recover. Valerie and Clockwork flew in to support her. "No, I won't give up." Danny muttered to himself. "I owe this to Jazz."

"Don't let revenge control you." Harry advised. "It happened to me and cost me dearly. I don't watch to watch you go down the same road. That's exactly what he wants." Danny got up, eyes burning with determination.

Sam and Tucker fired their weapons, as did Jack and Maddie, but none of the shots that actually hit were enough to even scratch him. Dora, in her dragon form, tackled Dan, but he returned with a bone-shattering punch, launching her into the air.

"This is all the magical world can offer me?" Dan laughed. "If not for my dear family, you would be finished. I grow tired of this game." He created dozens of copies, which surrounded his opponents. They looked at each other in fear as Dan grinned triumphantly. Harry and Danny charged after the original, while the others were left to deal with the copies.

"God, how many duplicates can he make?" Tucker complained, diving to avoid an energy blast. He noted that not all of them were attacking them. Some of the Dan duplicates were going after buildings, people, anything they saw.

"We'll wear him down!" Jack promised, but it lacked conviction even to his ears. Fortunately, he had his secret weapon. He kept it from Danny, because he knew what he would have to do. He prayed they could forgive him.

Sam was being plagued by two Dan duplicates. Maddie launched her gun at them, both direct hits. They faltered, but were not destroyed. Angrily, she took out the Fenton Quarterstaff and finished them. Another swooped towards her, but Remus blasted it with the Fenton Peeler long before he reached them.

"Quite a handy little weapon." he remarked. "Let's hope it can work against the original." Jack and Maddie barely spent time to breathe before going after other Dan duplicates. Several were going after civilians in the area, killing anyone they spotted. A couple of blocks around them were already destroyed and the police were useless against them. Danielle was distracting the duplicates, trying to get the civilians to safety, but she was quickly becoming overwhelmed.

"Eat this, spooks!" Jack yelled, firing his new weapon. It instantly shredded one of the duplicates, but the others got out of the way. They fired ecto-lightning, grinning as they did so. Maddie managed to dodge, but Jack endured a direct hit. However, he got up, blasting another duplicate.

The Weasleys, meanwhile, were trying to hold off another duplicate. Ron managed to slow it down, but they were too exhausted to do anything more to it. Fred and George threw their pranks at the duplicate. Their parents questioned the wisdom of that, until it trapped the duplicate in bubble gum.

"Destroy it, Hurry!" Mr. Weasley ordered. He knew that stuff would not hold the creature for long. He fired killing curses, as did all the others. He hated having to use dark magic so freely, but nothing else worked on this creature.

Danny, Harry, and Dan were dueling in the sky. Danny and Harry looked worried, since they had yet to cause any real damage. Together, they could hold their own, but their efforts at attack were almost pathetic. They simply did not know how to coordinate with one another.

Harry launched a beam of magic, which Dan predictably dodged. However, this sent him straight into the path of Clockwork's attack, sending him spinning. Danny followed with a ghostly wail, sending him into a building. It was quickly blown up, Dan bursting free of the rubble.

He grinned at all three of them. Really, what chance did they have? So they had amassed an army with ghost weapons. It's not like they did anything to him. Danny again launched his wail, him putting up a shield in response. "Give it up, Danny." Dan laughed. "You can't penetrate my defenses, no matter what you do."

"To his surprise, Danny was smirking himself. "Yeah, I know." He replied. "I just wanted him to sneak up behind you." Harry blasted him from behind, followed by Clockwork. Danny fired ecto-lightning, knocking him aside. Furiously, he pile-drived into Dam, punching him in every place he could possibly find. He was going to pay for murdering his sister! Unfortunately, his rage led to carelessness, and Danny was thrown to the ground, Dan floating above him.

Harry fired his own attacks, but Dan deflected them with relative ease. He grinned at the destruction. The resistance was nearly finished. Few were able to fight at this point. He spotted Valerie flying towards him, and flew to intercept her. Slowly, Danny got up, determined to stop his evil self.

However, it turned out that Dan fell right into a trap. Jack and Maddie blasted him with the Fenton Destroyers, and he screamed in agony. It was pain to rival the Cruciatus. In desperation, he threw himself out of the way and returned fire. The Fentons continued blasting, but they were unable to get another hit. Daneille attacked as well, with similar results, and she growled in frustration.

"You're not going to win, Dan." Danny snarled, Harry coming up behind him. The latter was feeling the strain, since the machine was beginning to affect him. Still, he ignored the pain and faced Dan determinedly.

James and Lily flew in front of their son, prepared for battle. Dan raised an eyebrow, unimpressed. Lupin tried to sneak up behind him with the Fenton peeler, only to be backhanded across the street. He expressed mild surprise that he survived, but had other things to worry about.

James and Lily launched ecto-blasts at Dan, who smacked them aside with ease. They glared at him with hatred, but fear was also creeping into their eyes. Dan launched ecto-lightning. Danny flew to intercept, but was blasted aside by one of the remaining duplicates. Lily kicked Dan across the face, James ramming into his chest, but neither attack had any affect on him.

He laughed to himself as he charged up an ecto-blast. Harry tried to stop him, but it was too late. James and Lily were consumed by the blast, and melted into goo. Harry yelled in anguish and blindly charged at Dan, who anticipated the attack and wrapped him up with ecto-rope. He sent a shock down, intending to fry him from the inside out. Harry managed to shield himself from the attack, but it was clear that he couldn't take much more.

Dan, fortunately, was distracted yet again, this time by Masters, who had been waiting on the sidelines until now. "I wondered when you would show up." Dan smirked. "Let's see if you fare any better than your ghost half."

"Forgotten about me, Dan?" Danny shouted, shooting like a rocket towards his evil self. He dodged, only to be hit in the back by the Fenton Destroyer.

"Tell me how powerful you are to kill a helpless girl!" Maddie screamed in fury, launching her jet sled. Valerie followed, her face every bit as angry as the Fentons. Dan put up a shield and blocked their attacks, but Jack managed to hit him with the Destroyer again. To make matters worse, Clockwork, Sirius, Danielle, and Wulf charged towards him as well.

"You'll pay for attacking my cousin!" Danielle promised, silently grateful that Clockwork had stabilized, but even so, she was wearing down fast.

"He wasn't this powerful when he began." Mr. Weasley mused. "How could he have gained so much strength?"

"That doesn't matter right now." Danielle snapped. "We've got to stop him, no matter how powerful he is!"

Meanwhile, Sirius clamped his jaws down on Dan's arm. He tried to shake him off, but he would not let go. Wulf slashed his back, Clockwork following with a powerful energy blast. Furiously, Dan launched his ghostly wail, hitting everyone near him. Everyone was blasted back immediately, despite their attempts to resist it. Another couple of blocks were destroyed by the sonic wave, though the area was mainly deserted by this time.

"You've got an excellent point, Mr. Weasley." Clockwork groaned. "He was not this powerful when Danny last fought him. It is true that my serum weakened him in the beginning, but he must have done something to increase his power."

"But we don't have time to figure it out." Ron panted. Fortunately, he was out of the way of Dan's ghostly wail. However, they were now in no shape to fight. Dan realized this as well, since he recalled his remaining duplicates and resumed his rampage of London.

Harry and Hermione heard crying nearby. Danny was kneeling over Sam and Tucker, both appearing to be dead. Danielle tried to comfort him, but with little success. Tucker had already passed away, while it was unlikely that Sam would survive. Valerie tried to comfort him as well, but it was no use. He was lost in his tears. Harry felt a great deal of sympathy for him. Danny had watched his sister and friends die before his very eyes. He knew exactly what he was going through.

"We've got to come up with some sort of a plan." Hermione instructed. "We can't let him destroy London without a fight."

"I think it's up to the muggles now." Mr. Weasley sighed. "There's nothing we have left to fight him with. We sent everything the wizarding world had to offer, and then some, and he merely brushed it off."

"No, we can't give up just yet!" Ginny exclaimed. "We may not have destroyed him, but our weapons affected him! The new Fenton design has already torn him up. If we can get enough shots in, we'll destroy him!"

"She's right; we're not letting him go!" Jack exclaimed, reloading the Destroyer.

"I'm with you!" Sirius agreed. "He's not going to get away with destroying my best friends. I don't even know if Remus is still alive."

"He's alive, but he's in bad shape." Valerie apologized. "He won't be able to continue the fight."

"I agree with you guys." Danielle told them. "I'm not about to let that son of a bitch destroy the city!" They stared at her blankly for a moment, since her swearing was not customary, but quickly got over it.

"We'll have to observe our losses later." Harry told them. "We have to bring him down before he kills everyone!" The survivors spotted Dan flying towards them, launching a pair of devastating ecto-blasts. Many of the remaining Order members were killed, including Mrs. Weasley. Moody had fallen as well, as did Tonks and Clockwork. He gasped out his last, spoke soothing words to Danny, said to enact their backup plan, and disappeared.

"I know what I have to do." Jack suddenly declared, getting up. He took out the shatterstar, and began to run towards the destruction. "This may be suicide, but it's our last hope!"

"That's a shatterstar, the most dangerous weapon in our world!" Hermione gasped. "You'll be signing your death warrant if you use that!"

"I'm sorry, but there's no choice." Jack sighed. "I love you, Maddie. Never forget that."

"Give it to me! I'll do it!" Danielle insisted, trying to grab it, but Jack kept it out of her reach. "I'm only a clone; it doesn't matter what happens to me!"

"No, you matter." Jack replied calmly. "I'm pleased to see your bravery, but I'm the one who has to do this."

"Jack, no!" Maddie screamed. "There's got to be another way! We can use the Fenton destroyers! Think about Danny! Do you want to leave him without a father?! Danny? Danielle?"

Danny, meanwhile, charged into Dan, more furious than he had ever been in his life. He fired his ghostly wail, blasting him aside, and unleashed a devastating punch. "I see you aren't dead after all." Dan laughed. "Tell me, how is dear Jasmine? I hope Sam and Tucker enjoyed my special attention." Danny burned with hatred and fired a huge energy blast, but to his surprise, Dan managed to shield himself from it. Danielle blasted him from behind, but was backhanded into a nearby ruin.

"How did you become so damn powerful?" Danny demanded, charging at him again. Danielle charged into him from the side while he was distracted, wanting to give Danny a chance. He looked around at the destruction, and saw military vehicles of all sorts in ruin. Even tanks were unable to withstand his most powerful attacks.

"Do you really think I revealed my full power to you on our first encounter?" Dan replied. He had to admit, the human weapons hurt, but it was far from enough to defeat him. "I needed very little to defeat a weakling like you. Clockwork's serum may have weakened me for a period of time, but that is done, and so are you!" He launched his ghostly wail yet again, Danny responding with his own. The forces clashed against one another, destroying with little survived around them. Danielle sighed, knowing there was nothing she could do. She couldn't perform the ghostly wail, after all.

Dora, Fright Knight, and Masters flew up to assist him, but they couldn't get near the duo. Finally, Danny became weary and the minute his wail stopped, he was sent into a building, barely managing to stay in ghost form. The others were following, eventually deciding to go down fighting, which seemed like a likely possibility.

"All right, guys, you know what to do!" Danielle exclaimed, looking at them.

"Of course; I intend to honor my agreement with Clockwork!" Fright Knight exclaimed, brandishing his sword.

"Yes, I know what to do." Masters sighed. "At the very least, we'll give him some kicks and punches to remember us by."

"No, I plan on surviving this and winning!" Dora shouted. She, too, was weary, but not as much as the others, as Clockwork ordered her onto the sidelines.

Jack run up to the front, frightened, but knowing what he had to do. He took Maddie's jet sled, since his own was destroyed, and flew up to Dan's height. He fired the destroyer, nailing Dan in the chest, and flew off, Dan giving chase.

Once he was far enough away, Jack yelled "Shatter!" and the bomb detonated, the blast going almost a kilometer. Most of it was in the air, but a small part of it touched the ground. Maddie watched with tears in her eyes. She would never forget her husband's sacrifice.

"Jack!" Danielle screamed. The others looked at her with sympathy. Even Fright Knight had to admit the human was brave to sacrifice himself like that. He only prayed it would be enough to destroy this monster; it was their last gamble. Danielle, meanwhile, flew down to Danny's level, ready for what she figured would be a much-needed pep talk.

Eventually, the light died out, and they waited for confirmation. However, to their absolute surprise, Dan was still floating in the air. Everyone looked horrified, but Dan was in bad shape with around half his jumpsuit torn, his fiery hair extinguished, burns and bruises all over his body. Even his cape was ripped off.

But his opponents had no more will to fight. Once they saw Dan survived their deadliest weapon, no one had any will to fight save Harry and Danny. Even Sirius hesitated to go against him now. Fright Knight, Masters, and Dora fought in the air, but they were not going to last long, even in Dan's weakened state.

"DAMN YOU, BOY!" Dan shouted. "I WON'T BE DEFEATED BY YOU AGAIN!" Now even Danny trembled in fear.

"As long as his halves are fused together, there's no way to stop him." Ron despaired and most people agreed with him. "We may as well surrender."

"I'm not going to surrender!" Danielle declared, changing back into a human. She tried transforming, but didn't have the energy. "We've taken a few losses, but so what? The battle isn't lost yet!"

"You might be right, but what more can we do?" asked Danny. "You're completely out of power, and I'm not far behind."

"Wait, that gives me an idea!" Hermione suddenly exclaimed, coming up with an idea. "What if we can separate the two halves? We'll be able to destroy them individually. Harry, use your Diffindo spell!"

"That's not bad." Harry replied after a moment. "What do you guys think?"

"Are we sure it'll work?" Mr. Weasley asked with concern.

"No, but it's not like we have any better ideas!" Valerie replied. "Besides, he's been weakened, so it has a better chance of working, assuming Harry has any energy left."

"Enough to do this, don't worry." Harry stated, wincing at the pain. It had been around 6 hours since the battle started and while the device had not destroyed him, he was in a great deal of pain. Perhaps it was because he had already used most of his energy. Thank Merlin their estimates were wrong.

"I have little energy left, but I can't let you do this by yourself." Danny said determinedly. Together, they flew up to Dan, who had just about finished his remaining opponents. He was no longer grinning, but looked at the duo furiously.

Danny blasted him, holding him in place, while Danny launched the Diffindo spell. Dan screamed, but it wasn't quite enough. Danny used his remaining power as a distraction while his comrade summoned all his remaining energy and shot it at Dan. He screamed again, and slowly, his two halves came apart.

They were in little better shape. Phantom was battered, looking horrible. He had almost none of his jumpsuit and his emblem was destroyed. Plasmius was badly shaken as well, but in slightly better shape. "Free! I'm finally free!" he exclaimed.

"Think again, cheesehead!" Phantom laughed, diving towards him. Plasmius was not about to get away from him! However, he dodged, not wanting to be part of a fused ghost again. Phantom was blasted by the destroyer, and in his weakened state, fell to the ground.

"You're finished, Phantom!" Danny promised, but with the last of his strength, Phantom created a ghost portal and disappeared.

"I suppose I should thank you." Plasmius smiled; his first real one in decades. "I've been his slave for the past 12 years, and you have freed me!"

"Is it over?" Hermione asked. "Is it really over?" As she said this, both Danny and Harry fell to the ground, out of power. Valerie sped towards them, managing to catch them before they hit the ground.

"Not quite." Plasmius sighed. "There's still one more thing you need to do: destroy me. We can't have him fuse with me again. You must administer the final shot." Without hesitation, Maddie stepped forward and fired. It hit Plasmius right in the chest, and he went to his "death" (so to speak) calmly.

Danny felt grief at that, and was about to shout at his mother, but deep down knew he was right. They couldn't have risked it. They slowly went back to the headquarters, but no one felt like celebrating. Fred and George were about to start, but stopped abruptly when they learned their mother was dead, and fell to tears like everyone else.

The remaining Fentons made plans to leave. They wish they could have had a funeral for Tucker, Jazz, and Jack, but there was nothing left of them. Sam managed to survive, thanks to a combination of magic and Muggle technology, but would have to use a wheelchair for the rest of her life. That, and Britain held too many painful memories. Danielle and Valerie spent several days comforting Danny and sharing the grief with him.

It turned out that in the 6 hours that Dan rampaged through London, around 70,000 people were killed and around 3 square miles of land utterly destroyed. They still had a hard time believing he had that kind of power, but since he was beaten, it didn't matter.

The Order wished the Fentons and their condolences. But there was still one question nobody knew: was it really over?

Wow, I never thought the story would get this long. I'll probably write an epilogue sometime, whenever I think about it. Hey, I warned you there would be a lot of character death. Even if I wanted to, I doubt I could write a sequel to this. Most of the characters are dead. By the way, I took down the first version because I forgot to include Danielle. I know many people hate her, but since she was part of the battle, I couldn't ignore her.