AUTHOR'S NOTE: This will be yet another collaboration with my friend who collabs with me on Acts of Vengeance and Forever Evil and credit for this prologue goes to him.

Disclaimers will be at the bottom.

Star vs. the Flashpoint Paradox

Prologue: Day Zero

El Oso laughed to himself as he gazed at the huge towers of stacked-up hundred dollar bills before him after he had ripped open the bank vault like a tin can. He had easily fought his way through the security guards in order to get at the prize that was now before him. The bear-themed villain thought to himself on how he should've come to the states sooner. The money and alcohol was much more plentiful here than in Miracle city, where he had to compete with a whole plethora of villains to make a dishonest buck in his life. As he looked upon his ill-gotten gain, El Oso came to a sudden realization about something he had forgotten to bring to his robbery.

"I should'a brought a bag, mans," he said to himself. "Oh well, guess I'll just carry all this loot with me."

"You know, I may not fully understand how banks on Earth work yet, but I don't think this is what a withdrawal is supposed to be," a young, female voice said from behind the criminal.

The super-strong thug spun around and found himself standing before a teenage girl with long blonde hair and dressed in an odd assortment of clothing. The girl was also carrying a wand in her hand that she was currently holding at her side and showed no sign of fear of the towering villain before her.

"Who the hell are you?" El Oso demanded.

"Hiya! The name's Star Butterfly!" the girl introduced herself with a friendly wave, as if she was introducing herself to a new friend. "You must be El Oso. Manny's told me so much about you!"

"Oh, that's really nice of hi-" the bear-themed villain said before catching onto what she had said. "Hey! That means you friends with El Tigre, mans!"

"Yep!" Star happily confirmed. "He's really good at Twister."

"Well I'm about to twist you into...into...into something...that's twisted!" El Oso proclaimed. "You gonna regret fighting me alone, mans!"

"I'm not alone," the princess corrected, still unafraid of the towering brute before her.

As if on cue, El Oso's enemy, El Tigre dropped down from the ceiling and landed next to Star with his claws out and ready for a fight. Before the bear-themed thug could make a move to engage them however, a cloud of red smoke suddenly erupted on the other side of the princess, revealing the Ninja of Norrisville with his sword at the ready for combat. Next to appear was Danny Phantom, who phased through the floor and floated upwards until he was hovering behind his teammates.

El Oso then heard a powerful roar above him and saw, to his horror, a red-scaled dragon and a group of Gargoyles flying downward from the ceilings above. Alongside them was teen hero Kim Possible and her sidekick/boyfriend Ron Stoppable coming down on a zip-line. Before the brute could move, the dragon, the gargoyles and the teen agents surrounded him. Following that, the protectors of Paris, Ladybug and Cat Noir, stepped out of the shadows of the bank with what looked like anthropomorphic Ninja Turtles and a trio of teenagers that consisted of a redheaded boy, an Asian girl and a heavy-set teen at their side, boxing in the villain with no chance of escape.

Upon seeing that there was no chance of fighting his way out of this, El Oso did probably the most logical course of action in his life.

"I'd like to go to jail now," he meekly said.

Orbiting the Earth's atmosphere, there was a space station that once belonged to the Global Justice Network before changing owners. While station was under new management, its purpose remained the same: to protect the people of Earth. Several months ago, after saving the earth from certain destruction from the ecto-comet, Danny Phantom had an idea. While he had managed to save the world from a nearly unstoppable threat, he knew there might come a day when he would not be able to save the planet from another crisis on his own. So, he went about seeking out others like him. Heroes who could rise to the challenge and help him in battling forces no one could stand against alone.

From New York to Townsville and beyond, the half-ghost sought out other heroes. He first discovered the American Dragon, Jake Long, and Randy Cunningham and asked them to join in his cause. Admittedly, the two of them where a tad hesitant on joining a team since they usually fought the forces of evil alone, but they finally agreed. From there, the trio recruited the likes of the Powerpuff Girls, the Crystal Gems and even the reclusive Ninja Turtles to their team. Once they inducted Kim and Ron onto the ever-growing team of heroes, they got the attention of Dr. Betty Director, the head of Global Justice Network and received not only the former orbital outpost as a base of operations, but also the full-backing of the GJN and the United Nations as well.

With the governments of the world now fully backing them, more heroes from across the globe joined their ranks such as El Tigre, Ladybug and Cat Noir. Other heroes such as Penn Zero and his friends, Boone and Sashi became members the same day that Dipper Pines and his sister, Mabel, were also allowed to join. Even Dib Membrane and his terrifying sister, Gaz, where invited onto the team. Goliath and his clan soon followed the Turtles' example and came out of the shadows to also fight alongside the army of justice.

Together, the united heroes of Earth stood together and faced off against many threats. The team defeated Vlad Plasmius and his cabal of villains when they attempted to unleash a powerful weather machine on the planet. They managed to defend the planet from intergalactic adversaries like Lord Dominator, the Decepticons and Homeworld. It wasn't even just enemies from the depths of space they did battle with, but also from other dimensions as well, such as the times they managed to fight back invading armies from the realms of Dimension X, Eternia, Thundara and Outworld that had been sent by the forces of evil known as the Kraang, Skeletor, Mumm Ra and Shao Kahn. The team even traversed the darkest parts of Hell itself to save the soul of April O'Neil from the clutches of Him and Bill Cipher.

Through their trials and tribulations, the group gained a high regard of respect from the world they had united to protect. They earn the seal of approval from both the mighty Autobots and the legendary G.I. Joe for their acts of bravery. Together, there was no force on Earth-or in the entire universe for that matter that could stand up to them. For they were strong, and they would forever fight as one. They were the Infinity League.

Star had only been a member of the Infinity League for only a few weeks now after she and Marco where recruited by Danny to join their ranks, but she already felt like she was part of a legacy in the making. She hadn't been apart of a major, world endangering crisis yet, in fact, this was her first real mission since her induction to the team, but she was happy to be among those she considered to be legends.

After the princess of Mewni and her teammates sent El Oso back to prison, they were teleported back to their base which they had come to call the Infinity Station. Once they arrived back on their orbital base, they were greeted by the teleporter's operator.

"Welcome back, guys," Dipper greeted his teammates. "So, how was the mission?"

"Pretty honk'in boring," Randy replied as he and the other heroes stepped off the teleportation platform. "Seriously, why the juice did we all need to go after El Oso?"

"I figured it would be a nice team building exercise," Danny said. "Besides, it's been pretty quiet lately, I figured we could all use the excitement."

"That was excitement?" Raph questioned before getting a look from Leo.

"I was hoping to break some bones!" Sashi mentioned.

"Well in any case, that'll teach ol' fur for brains to keep his crimes in Miracle City and not anywhere else," Cat Noir pointed out.

As the rest of the team went about their business within the space station, Star ran up to Danny in the hopes of getting his praise for a job well done.

"So, how did I do for my first mission?" Star asked him.

"You did great, Star," the half-ghost informed her with a smile. "While I'd hardly call catching El Oso a trial by fire situation, you did an excellent job regardless. It's too bad Marco couldn't be he-"

Danny stopped himself before he could say more, but it was too late. In the time that Star had been a member of the Infinity League, she had told her new friends about her feelings toward her best friend and begged them not to tell Marco directly, though many of them offered their own advice on the situation, many saying that she should just tell the boy how she truly felt about him.

"I'm sorry, Star," Danny apologized thoughtfully.

"No, it's alright," the princess assured with a forced smile. "I'm okay."

"Maybe you should take the rest of the night off, we're all good up here," the leader of the Infinity League suggested.

"Can't I stay up here just a bit longer?" Star begged. "Please?"

At first Danny was confused by his teammate's actions, but then he quickly pieced it together in his head as to why she really didn't want to return to her home on Earth.

"He's with Jackie right now, isn't he?" he surmised.

A look of sadness came over the blonde's face as she slowly nodded to confirm what he had guessed.

"Star, you can't keep hiding your feeling for Marco like this, it's unhealthy," Danny said "Just ask Dipper. He went through some pretty nasty stuff before he told Wendy how he felt about her."

"Why does everyone use me as an example for how not to get into a relationship?" Dipper commented in an annoyed voice. "I am with Wendy now, you know? If you wanna look for a bad relationship to exploit, use Penn and Sashi. All they do is argue!"

"I heard that, you little shit!" Sashi shouted from across the station, making Dipper shriek in terror before running off with the part-time sidekick giving chase.

"Anyway..." Danny continued as he attempted to disregard what just happened. "Look, all I'm saying is that you should tell him before it's too late."

"But he's with Jackie," Star reasoned. "If I just tell him that'll ruin things between me and him and maybe even things between him and Jackie!"

"Maybe, but if he's as good of a friend as you say he is, then he'll still care about you regardless," her leader replied.

"Thanks, Danny," Star said before embracing her leader in a tight hug.

"No problem, Star," Danny replied as he returned the hug. "I'll have Dipper send you back."

"Sashi, wait don't Gah!" Dipper's voice ordered from across the station before screaming in pain as the sound of bones being broken following suit.

"Uh, I mean, I'll send you back," Danny corrected himself.

"Should we help him?" Star questioned out of concern as she noticed the amount of trouble the boy was in.

"My arm doesn't bend that way!" the mystery twin screamed in agony. "AGH! Now it does!"

"...Nah, it sounds like he's got everything under control," Danny dismissed.

Ignoring the cries for help, Danny reactivated the teleporter just as Star stepped back unto the platform. The hero of Amity Park punched the coordinates to Echo Creek before sending the princess back to her home. As he did, he had sense of dread creep up his spine, as if some short of sense of danger as trying to tell him terrible was coming. It was because of that sense of fear that almost made him regret sending the young princess back down to Earth. It was as if he felt like he had just doomed the world he fought so hard to defend to its destruction. Danny simply shook off the strange feelings before heading off to stop from Sashi from pummeling Dipper any further, disregarding his fears as merely the result of working too hard.

The teleportation beam faded away as Star found herself standing in front of the Diaz residence. There was a time when coming to this house filled her heart with an indescribable amount of joy in her heart, but now it filled her with sadness. Ever since Marco and Jackie had become an item, Star felt nothing but this crushing loneliness. She hadn't just lost her chances of being with Marco, she felt like she had lost a friend. She bared no grudge toward Jackie. She wasn't trying to destroy the bound between the princess and Marco out of malice, the young skater was only following her heart as was Marco.

So, with a heavy sign, Star put on a brave face before entering Marco's home. As always, the laser puppies she had summoned her first day here ran up to her and began to leap and yip happily around her, to which their creator barley regarded at all as she made her way toward the living room. It was there she found Marco and Jackie sitting on the couch, eating nachos and watching some cheesy monster movie.

"Hey, Star," Marco greeted as he stood up to see her. "How was your first mission with the League?"

"It was good," Star half-heartedly answered. "It was just us catching El Oso."

"Well, that sounds fun regardless," Marco mentioned. "Hey, you wanna watch the rest of this movie with us?"

"Yeah, Star, it'll fun," Jackie added with a smile.

"No, I'm pretty tired," the young princess answered somberly. "You guys go ahead without me."

"Are you okay, Star?" her secret crush inquired with concern in his voice. "Is something wrong?"

In that moment, Star thought about what Danny had told her about her feelings toward Marco. She wanted nothing more than to confess her love to the boy, but then she looked over to Jackie and considered how bad of situation this could become.

"...It's nothing," she finally told him as she attempted to keep up appearances. "I'm just...really exhausted."

"Well...okay then," Marco accepted, though he was still unconvinced. "I'll see you in the morning."

Star said nothing in response. Instead, she only turned away and began to make her way back to her tower, making sure that Marco didn't see the single tear fall from her eye. The puppies continued to yipped and bark as they playfully followed the princess up the stairs that lead to her room. A part of Marco wanted to try and stop her and try ask his best friend what was wrong with her, but he quickly remembered that he had his girlfriend waiting for him and returned to Jackie's side to continue to watch the movie.

Meanwhile, in Star's room, the princess threw herself on the bed. She had had hit rock bottom. Ludo still had passion of the spell book, and in turn also had Glossaryck as well, and the love of her life was in the arms of another woman. The League had offered their services in helping her find her missing book and mentor, but she denied their assistance, saying it was her cross to bear alone since she felt as though it was her fault that Ludo now had the book and Glossaryck. It wasn't only the loss of her book and friend that ate away at her with guilt, but also the fact she had failed to once again tell Marco who she felt toward him.

A part of her always wondered if she told him sooner, would things be different? It wasn't like she didn't have the perfect moments to say something, she had more than enough opportunities to speak to Marco about this, but every time she wanted to say something, it was like her mind and heart forbid her from talking about it. It wasn't just from fear of rejection that she did this, but also out of respect for Marco and Jackie. She knew how deeply her friend cared for the girl and saw how Jackie in turn cared for Marco as well, but it still pained her worse than any sort of wound the likes of Ludo and his monsters dealt in her in the past.

"If only there was a way I could go back change this..." Star mused to herself.

In that instant, an idea sparked in Star's mind. Perhaps there was a way she could change everything. Before Ludo ran off with her spell book, Star read in Queen Eclipsa's chapter about a time spell that allowed someone to travel back to any point in time for one hour to alter that timeline as they saw fit. However, Star knew the of the dangers of messing with time, as she had experienced what could happen one attempted to alter a timeline when she and Marco accidentally froze time itself. If Glossaryck was here now, he would tell her to not even consider casting the time spell. But on the other hand, Glossaryck wasn't here to stop her.

"No!" she said to herself. "There is no way I am casting that spell!"

With that she got up from her bed and placed her wand on her dresser in order to keep her inner temptations from getting the best of her. No matter how hard it hurt to see Marco with Jackie and the guilt of losing her family's most sacred item and mentor to Ludo hanging over her like a noose, she would not cast that spell. With that in mind, she walked back to her bed and laid down and attempted to get some sleep.

"I don't need that spell," she told herself repeatedly.

Meanwhile, in the confines of her closest, Toffee's finger, which had been laying still on the floor for since Star took it out of the wand...began to twitch.

DISCLAIMER: Star vs. the Forces of Evil, Gravity Falls, Wander Over Yonder, Randy Cunningham: 9th Grade Ninja, Penn Zero: Part-Time Hero, Kim Possible, American Dragon: Jake Long and Gargoyles are owned by Disney, Danny Phantom, El Tigre: The Adventures of Manny Rivera, Invader Zim and Teenage Mutant Ninja Turtles are owned by Nickelodeon, The Powerpuff Girls, Steven Universe and ThunderCats (I think) are owned by Cartoon Network, G.I. Joe and Transformers are owned by Hasbro, Miraculous: Tales of Ladybug and Cat Noir is owned by Zagtoon and Mortal Kombat is owned by Netherrealm Studios. I have absolutely no idea who owns He-Man, but it's obviously not me.