At long last, the fighting begins! Well, some of it.

Hope y'all enjoy!

Red's advice had not gone unheeded. Soon, a small army comprised of the best of the best warriors from each universe had been gathered together at the portal entrance.

For the Equestrians, it was the Wonderbolts and the Mane Six and Starlight.

For the UNSC, it was the Chief and a squad of ODST soldiers.

For the Elites, it was the Arbiter and a personal squad operating under his command.

For the Mobains, it was Red's personal squad from the Royal Fighters, the Phantom Squad, Sonic and his friends, and a few brave Mobains who had joined the cause.

As mentioned earlier, Ninjago and Gravity Falls only had what was currently provided, so they had little to bring back save for some extra gear and equipment. After everyone had gathered together at the portal, they had been given a quick summary of what their reconnaissance mission was: go through the portal, find out what was on the other side, and report back. Unfortunately, all of those plans quickly went down the drain when the heroes discovered a shocking trait from the portal; it only allowed specific individuals to enter. After some careful trials and errors, it was determined that only the following could enter: Bill Prower, Sonic the Hedgehog, Red the Hedgehog, Tails, The Mane Six, Starlight Glimmer, the Ninja, the Master Chief, the Arbiter, and Dipper and Mabel. While this did complicate things a bit, the group was smart enough to com's up with a different plan.

"Have all our squads set up a perimeter around the portal," Cortana suggested, "Make sure that nothing gets in or out that isn't one of ours."

The squads did as they were told, and soon a perimeter had been made with the combined efforts of the soldiers present. Those who were permitted entry looked at the entrance to the unknown, feeling a slight sensation of fear go through them. None of them said it aloud, but they all were thinking the same thing more or less: "Could this be our last?"

Bill seemed to notice the faces of concern that everyone was sporting, and said, "I know that most of us are thinking that this may be our last fight, but think about what's at stake. This entity, whoever it may be, is threatening our worlds, our universes, our very existence. We cannot allow him to get away with this crime. I know that it means putting your life on the line, but that's exactly what's at stake! So why don't we go in there and show him who he's messing with?"

Everyone cheered or nodded in agreement, then with a single cause stepped through the portal to face their foe.

On the other side of the portal, the group found themselves standing in a plane of existence that Tails felt was similar to the limbo that he and Sonic had been sucked into once by the Time Eater. There was nothing to be seen at first, then a being dropped down in front of them that looked very much like a robotic version of Dark Gaia from Mobius. Sonic, cocky as ever, stepped forward and said, "Alright, whoever you are! If you wish to avoid an embarrassing beat down, you should give up right now!"

A hatch opened up on the robot's head, and a familiar obese figure appeared.

"You and your friends are in no position to demand anything, you spiny rodent!" Eggman scoffed.

"Figures," Red muttered when he saw the madman.

"But that doesn't make any sense," Tails objected. "There's no way you did this alone."

"Of course he didn't, child," a dark voice answered, "He had a little help."

A dark spiritual being levitated down next to Eggman and transformed its form in a flash of light. A large dark human-like figure stood in its place, one which the Ninja were painfully familiar with.

"Overlord!" they exclaimed.

"Princess Twilight!" a loud voice called. The alicorn stiffened as the figure revealed himself in a flash of light.

"Tirek!" she growled, and the rest of her friends did the same. Pinkie's disguise fell off when this happened, which made her look more intimidating. Thankfully, nobody on her side was scared of her Changeling appearance. Just then, the ground burst apart next to Eggman and a large grotesque being crawled its way to the surface. Several smaller creatures crawled out from behind it as well. The Chief and Arbiter were well aware of who it was, but didn't saw anything.

"W-what is that?" Tails asked.

"I?" Gravemind answered, "I am a monument to all your sins."

"A monument to my indigestion perhaps," Cole muttered. As he did, a triangular shaped figure appeared in front of the villains with a hysterical laugh. His one eye turned towards the heroes.

"Cipher!" the twins shouted. Earlier, they had decided to refer to him as Cipher to avoid confusion between the demon and Bill Prower.

"Well, well, well!" the demonic Illuminati remarked, "You brought the whole gang with you! We're gonna have ourselves a little party up in here at this rate."

"But that doesn't make any sense," Dipper stated, "There's no way you did this alone."

"Of course not, silly!" Cipher laughed, "Behold my new partner in crime, the only one of his kind! Tremble before him and despair!"

A column of red smoke appeared and the man in question appeared to greet them, an evil smile on his face. The entire group of heroes gasped as they realized who it was, calling him by the names known in their respective worlds or universes, save for the Chief and Arbiter.

"TD!" the Equestrians and twins exclaimed.

"The Serpentine Droid!" the Ninja shouted.

"The Lord of Chaos!" Sonic and his team exclaimed, although Red and Bill seemed to have been hit by a bad vibe.

"William?"

The last one was spoken by Twilight, who held an expression that was a mixture of sadness, betrayal, and disbelief. TD simply smiled and said, "Welcome to the end of all things. I hope you came prepared."

"TD, what are you doing?" the Equestrians demanded, "Why would you do this?"

"It's nothing personal girls," the boy stated calmly, "It's simply what I have been wanting to do for a long time: get revenge on those who wronged me. Starting with the brother."

Although no one knew what he was talking about, everyone realized that he had done this as a means to reach someplace that he normally couldn't reach. Bill stepped forward along with Red, and TD looked to them with an evil grin.

"I see that you've already met my rogue personalities, who separated from me when this started," TD stated. Everyone looked to the two Mobains in surprise.

"What's he saying?" Sonic asked.

"Uncle?" Tails had a look that meant "tell me this isn't true." Bill looked TD in the eye. Not a sliver of fear could be seen in his expression or his eyes, only defiance.

"I separated from you, TD, because I realized what you obviously didn't realize in time," he growled, "You've allowed yourself to be consumed and now you have lost all reason. I separated because I didn't want to be your puppet, like I know you would've made me become."

"So sad," TD scoffed, then to Red, "And your reason?"

"I'm a neutral character," Red stated, "I just wanted to have some fun."

"I don't understand," Tails said, causing Bill to look to his nephew. Bill sighed.

"When I first came to Mobius, I was but a part of TD. However, I decided to forge my own path by separating from his being and creating an alternate timeline in Mobius's history. As such, Bill Prower was born and I was able to live another life, free from his influence."

"So you lied?!"

"No! I lost my memory!" Bill explained. Everyone had stopped to listen to him now, curious of what he had to say. "Miles, when you found me in the cyrosleep chamber, my amnesia had taken away more than just the memory of my new existence; it had also taken away my memories of TD. I only recently had it restored when we defeated TD as Eggman's supplier. I would've told you sooner, but then this happened. I never wanted any of this to happen. I just wanted to know what it was like...to have a choice... I'm sorry..."

Tears started streaming down from Bill's eyes, much to the amusement of TD.

"There! Now you see! He has deceived you from the start. He never was your friend or your family. He was just a puppet for my plans! And while he has outlived his usefulness to me, there are others I can resort to. How does it feel, Miles Prower? To have all you love wrenched from you?"

TD laughed while Tails simply seemed conflicted with his emotions. Everyone else just glared at TD, for they knew that he was toying with them. Just then, Twilight walked towards TD slowly and deliberately. TD noticed this and said, "Well, what's this? The Princess of Friendship? Have you come to be by my side, like you've always wanted? I'd say that I'm touched my dear, but I'm afraid that-"

*SLAP!*

Without a word, Twilight smacked him across the face with her front hoof. Everyone was shocked at Twilight's action, and even the villains grimaced at the sight.

"How could you?" Twilight demanded, as angry tears formed in her eyes. "Why would you do this to us?! I treated you like a friend, and eventually more than that! I trusted you, gave you another chance, and THIS is your thanks?! I'll never join your side, and I'm sorry that I ever decided to believe that I could love you! You MONSTER!"

Her last words rang throughout the limbo like an echo, but it seemed to have some affect on TD. His expression went from shocked, to sorrowful. A tear fell from his eyes, then suddenly his evil grin returned, but it wasn't natural. It seemed forced, involuntary. Twilight noticed this, but before she could ponder why the sudden change had occurred, TD grabbed her and threw her back towards the heroes. Bill instinctively caught her with his psychic powers, even as he was, and set her down.

"Very well then!" TD shouted, "Why don't you join the rabble, and perish with them all!"

He stepped back and looked at the group before him. It was then that Tails finally spoke. His face was one of anger, but not towards his uncle.

"You know, you're right," he said to the dark entity, "Maybe he was just a puppet in your games. Maybe all he served was as a trick to fool us. But no matter his origins, I know my uncle is not a traitor! He's never lied to me about how much I mean to him, and he certainly wouldn't lie to me now! And like it or not, he has chosen his own life now, TD, and with his help we will take you down for good!"

Bill smiled proudly at his nephew, who quickly gave him a big hug.

"I'm sorry it came to this, little buddy," he whispered.

"I know," Tails said, "but for now, let's kick his butt."

Bill nodded, then stood to his full height as the heroes assembled. TD simply looked bored.

"Kill them," he ordered, and the villains charged forward. The heroes barely had time to prepare themselves as the villains charged towards them, intending to end their lives once and for all.

Everything was going south for the heroes at first. The villains were obviously prepared for this fight and were utterly determined to destroy the heroes for good. Even with the superior combat prowess of Bill Prower and Red, the heroes were hard pressed. It wasn't until Red saw Pinkie Pie get hurt by Bill Cipher that things turned around. Pinkie had transformed into a dragon-like creature and was keeping some of the villains occupied, but unknown to her Cipher had sneaked up behind her. With a blast from his hand, he stripped away her dragon disguise and trapped her inside of a pyramid-shaped cage. When Red saw this, anger boiled inside of him and he released a huge surge of energy from his trump card: the Phantom Ruby. The energy surge had canceled out Cipher's prison, much to the entity's surprise, and Pinkie Pie bounded away to safety. However, Red's form had changed as a result of using the Ruby, a change that all the heroes were either surprised to see or grim with memory of who he represented.

Red's fur had changed from... red to black, with the edges of his quills a dark grey color. His boots and gloves were black too. A silver mask covered his face and only one of his yellow eyes could be seen. On his chest, visible to all, was the pulsing and vibrating gem that had caused the energy as well as the transformation. Red's voice also changed into that of the figure that was still fresh in the minds of all Mobains. He may have been a different species from the original, but Sonic and his friends knew who was portrayed nonetheless.

Infinite, the first to defeat Sonic.

Infinite turned to the villains and released another burst of energy that engulfed both sides. On the heroes' side, they suddenly found dozens of clones of themselves joining the fight. It was unclear what the villains were seeing, but it obviously offset them to the heroes' advantage.

"Alright!" Sonic shouted, "The tides have turned! Let's do this!"

The heroes struck again, this time gaining the victory. The villains fought back with a fury, but with the Phantom Ruby on the heroes' side, the battle was very one-sided. Even Bill Cipher was affected by the Phantom Ruby's power, and it both excited and terrified him. Eventually, the villains lay defeated and the heroes turned to the only one left standing: TD himself. TD snapped his fingers- actually, he pretended to and the sound effect was heard; he can't snap his fingers to save his life- and the villains all disappeared.

"Bravo!" he said in mock congratulations, "You have more fight in you than I thought. But you will still lose."

The response he received was the entire army of heroes' charging him at once. TD simply closed his eyes and then opened them again. When he did, a shockwave of energy surged over them, knocking them aside like rag dolls. He then fired a burst of lightning at the majority of them, each bolt making it's mark. The heroes were badly hurt, but the lightning thankfully had not been powerful enough to kill them.

"As I predicted," TD stated. "You'd better get yourselves ready, friends. The real battle has just begun."

With a hysterical, evil laugh, the limbo around them disappeared and they all found themselves outside the portal, where the forces outside immediately rushed to their aid. But the heroes were not concerned about their wounds, for they knew that TD was right.

The battle had only just begun, and he had proved who was the stronger today...

Stay tuned! An epilogue is on the way, then it's on to Volume Two!

Thanks for reading this so far! I'll catch y'all later!