Warning: This South Park/The Simpsons Crossover Fan fiction story has very foul language, implied Sexual situations and a great mass mockery that the show is widely known for over the years. That I don't owned or created South Park by Trey Parker, Matt Stone and Comedy Central or the Simpsons that is created By Matt Groening and The Fox Network because I write my own stories between season breaks .It is intended for mature reading if you find it too vulgar to read that you have the choice to do not read it at all or do not a give a crap at all which I hope that you will be enjoy it and laugh your ass off.

Mysterion vs. Bartman

Chapter 1: The Youth Vigilante Trend

One starry night hung over the small semi normal mountain town of South Park, Colorado like a travesty. Crime was starting to go down a little after the cause of it was uncovered by the Freedom Pals, which that order had been restored. There are remnants of crime within the small community still. But the town has a group of young vigilantes, who are willing to lay their life on the line to protect their community. A pint sized shadowy figure was seen running and jumping across the rooftops of many local businesses to give them stealth on the lookout for any evil doers, who want to cause chaos in the town. Mysterion, the second in command to Dr. Timothy of the costumed vigilante group, Freedom Pals.

"It had been so quiet around here lately. I can sense something big is coming." Mysterion said to himself, as he glanced over the roof edge to look over all of the downtown area of South Park. Being quiet in this town is an understatement that something is always occurring here on a daily basis. "Mysterion, we need a report back at the base." Dr. Timothy's voice came in his mind at that mind. "Nothing to report at all, Dr. Timothy, but we should not let our guard down completely yet. "I'm greatly agreed with you, Mysterion. "Dr. Timothy quickly replied mentally deep inside his mind. Mysterion had decided to pays a visit to Mayor McDaniels for an update.

Cut to South Park City Hall inside the mayor's office that Mayor McDaniels was at her desk doing very important paperwork and she had not been speaking to a lot of people lately too. Mysterion had sneaked through the dark filled hallway that led to her office.

"Who is here that I'm not in the mood to deal with everyone right now?" McDaniels demanded coldly, as she had looked up at her office doors when Mysterion had popped his head between the doors. "Jesus Christ, kid! You almost gave me a heart attack!"

"Sorry, madam for scaring you likes that?" Mysterion quickly apologized for easily frightened her that she was starting to calm down a bit, as she remained seated behind her desk with her hands gasped together. "But anyway… Did your patrol turn up anything this evening?" McDaniels asked after recovering from the scare.

"It had been too quiet around here lately, madam." Mysterion answered her question, as she looks at him by listening to every word. "Kid, be mindful that this is still South Park." The mayor reminded him to be mindful for anyway that this town will throw at. But something foul hung in the air across the town that someone is plotting against the Freedom Pals more toward Mysterion. Cut to the Coon's lair that the coon was quietly plotting against his former crime fighting cohorts, who are now the members of the Freedom Pals. He sat at the mini boardroom table alone that he was literality clawing at his chair's arms out of anger.

"I hate those fucking assholes that they are going to pay for ruining my plans. Fucking Mysterion and butthole is stealing my fucking thunder in this town." Cartman ranted angrily to himself when he had seen photos of the Freedom Pals on the news. "I had not tasted anything, but shit ever since you had farted in my face, butthole." All sudden he had noticed a news report on the TV about a newest trend of children vigilantes taking on crimes in their towns and cities across the country. "What?"

"There is a brand new trend across the country that America Youth are fighting back against crime and corruption in their community on following the heels of the Freedom Pals." Tom Thompson spoke at the camera, which it had fueled Cartman's rage more. "In the city of Springfield that they have their own little crime fighter like Mysterion and the farting Vigilante named Bartman."

"Don't have a cow, man." Bartman spoke that he doesn't want to be interviewed on the news at all. Suddenly, a sinister idea of revenge popped into Cartman's head. "That is it that is what I need by wedging a rivalry between Springfield's Bartman and Mysterion that I will be in heaven." He smirked evilly, as he sat there in his chair.

The following morning at the Freedom Pals base in Token Black's basement that the members of the group were there for a normal briefing on the updates on the local crimes and the whereabouts of the Coon who had gone rogue and taken Chaos' place as the town's chief villain.

"Bzztt... There are pockets of crimes located within the town still... Bzztt!" Mosquito spoke up, as the other members had taken their seats at the table. Kitty Litter and The Shadow aka the amazing butthole flanked the sides of Mysterion.

"It seems like everything is starting to be back to normal now." The Human Kite added that is when Dr. Timothy warned them to be vigilant that The Coon had gone rogue as a villain now. "Human Kite, we need to be vigilant around here that after all this is South Park. The Coon is sneaky and planning an act of vengeance against us."

"You are right that Cartman could be out there bidding his time to plot against us right now." The Shadow quickly spoke up about Cartman's streak of revenge against those had wronged him.

"Don't forget that Cartman had killed his father and stepmother and turned them into chili to feed them to his half brother." Mysterion reminded them of Cartman's past acts of cruelty that he had done against anyone who had wronged him

"What the fuck? The Shadow confessed with disgust that everyone in the room looks sick in the face when they had heard about the gruesome details of Cartman's brute act against Scott Tenorman for screwing over him with pubes hair.

"Why he had not been convicted of this act of cruelty against his father to punish his half brother over selling pubes to him?" Kitty protested on the lack of justice and punishment taken against Cartman.

"He knows how to play the faulty justice system for his way that he had shot me and gotten away with it too." Tupperware told the group.

"You know our police dept is not the best for anything that we all have to stand your ground against that fat bastard to take him down again." Tool shed sighed heavy, before he spoke up. "It is our oath that we all had sworn on when we became the Freedom Pals to protect this town you guys." All of them nodded in full agreement and puts their hands together. "Freedom Pals, assemble!"

"Oh, don't f-f-f- forget that w-w-w-we destroyed his s-s-s-shit during the g-g-gender w-w-war you g-g-guys." Jimmy reminded them of their false accusations toward Cartman for being the school forum's troll that had led them to break his shit.

"Dude, he used Heidi against me!" Kyle said that he looks broken at that moment, which it had led to theresurgence of the M.A.C. to cause the ignorant nuke strike on Canada now he feels guilty for the destruction over heartbreak.

XXXXXXX

During that time, cut to South Park City Hall in the mayor's office that Mayor McDaniels was still working on the next year's budget when all sudden her office phone begins to ring at that moment. "Hello, this is Mayor Mary Kay McDaniels, what do you want, Quimby?" McDaniels demanded coldly that he hates Quimby on the levels with Randy Marsh these days."What are you challenging this town on who have the best pint sized vigilante?" As both aides were walking in the room while McDaniels was on the phone, who is trying to get off the phone at those moments. "Look, Quimby that I've to run to a city planning meeting in a few minutes." McDaniels lied that she can't stomach him at all, which she thinks that he is a sleazy slime bag. But he is keep egging her on which town has the pint sized vigilantes, which she stood there rolling her eyes with disgust that she had decided to hang up on him. "God, I hate that sleazy asshole."

Meanwhile at Cartman's house in his bedroom that The Coon had decided to make a fake social media account to spread false stories on Springfield's Bartman's Instagram page to fuel a fake rivalry between Bartman and Mysterion. "This is fucking awesome that I'm going to start a civil war with different franchises." Bart had put his little sister, Lisa in charge of his crime fighter's ego alter social media accounts.

"Geez, Bart that it looks you had made someone angry in South Park?" Lisa asked her old brother who was sitting on the edge of her bed, as she was scrolling through the comment section on his Instagram page.

"What? Lisa, I care about my town think, over what those backwards mountain folks think." Bart expressed his view on the so called faking feud is spilling out on social media right now.

"Well, Bart that someone is literality going on the photos' comment sections to bash you and wrote Team Mysterion or Freedom Pals assemble." Lisa replied back with great concern, as she looks at his own non concerned older brother who was checking his slingshots out for any weakness in the rubber bands to snap during a takedown of a dangerous criminal like Snake and the Springfield Mafia.

Unknown to both the Freedom Pals and Bartman that Mayor Quimby was planning to have a major contest to pits his town's superheroes Bartman and House Boy against McDaniels' Freedom Pals for their skills, which the South Park mayor don't get on the board for this contest at all.

Mr. Mayor, Mary McDaniels still not have accepted your idea for the best child vigilante contest between Springfield and South Park." The Squeaky teen spoke, who works as an errand boy for the scandalous mayor who was seated at his desk with his fingers gasped together.

"Oh, look like that I'm going to take a little business trip to South Park to woo McDaniels in my way to get that contest going." Quimby smirked in a sleazy way that he was heading out for South Park to see McDaniels personally.

Back at the Simpsons' home that Lisa had gotten back on her computer to check the Bartman's Instagram page after studying for a big test that is coming up within a few days. She is shocked by seeing many anti Bartman comments by praising Mysterion instead.

"Who the hell is this heckling internet troll been trolling Bart's superhero Instagram's comment section?" Lisa spoke to herself, as she scrolled through the photos' comment section nonstop, which unknown to the Coon was going to town it the nonstop insulting both Mysterion and Bartman big time. "Take that, Mysterion and Freedom Pals that I shall have my revenge against your assholes." He begins to laugh evilly at the mayhem is about to bring a major shit storm on Mysterion, Freedom Pals at any time now.

"Lisa, it is time for bed that you have school in the morning!" Marge hollered from the master bedroom, while she was getting ready for bed for herself and Homer was passed out in bed already.

Author's notes: This crossover story came out of the blue, while replaying The Fractured but Whole and starting to reread my Bartman comics again. The whole who vs. who debate again is back in many fandoms again.