Okay, so this story is going to need quite some explaining before everyone gets it, seeing as the Sonic franchise loves creating countless stories, all following different paths. Thus I decided to make a path of my own. This story is mostly based off of Season 3 of Sonic X, with the following changes:

- Sonic's home planet is a world called 'Mobius', the fourth planet orbiting a distant star called 'Telvin Six'. Because the concept of a future version of Earth is highly unrealistic and this story takes realism into account, the surface of the planet, nor the names of the continents, will have any connection to Earth's. Mobius isn't Earth, they're different worlds. There has also been absolutely no interaction between the two worlds, and they are unaware of the existence of the other.

- Telvin Six is located in the Bogon Galaxy (a location from the Ratchet & Clank franchise, and that's one of the reasons that this story is a crossover) while Earth is located in the Polaris Galaxy (Polaris Galaxy is also from Ratchet & Clank)

- In this story, every character wears clothing. It's not because I have something against the art style of the Sonic series, it's just that it'd be awkward combination, a franchise in which every character wears clothing and a franchise where this is not the case. Dang, writing it like that makes it even more awkward, huh? Just bear with me please, moving on to the next point.

- This story is, for the most part, my own adaptation. I hope this doesn't annoy Sonic fans, I truly do. Because of this story being my own adaptation, I'll grab several parts from various published works about Sonic, games or spin-offs.

- This story is probably gonna be very confusing as I have to change some things for them to scientifically make sense, stuff like Planet Eggs isn't possible viewed from a scientific perspective, and I did say I was going for realism.

- Even though it is based off of Sonic X, the storyline has been altered greatly to make more sense from a scientific perspective. (It totally has nothing to do with the fact that I'm also very new to the Sonic franchise and because I didn't see Sonic X...) Just bear with me, please.

- This story is set after the events of Sonic X.

With that said, I hope you'll all enjoy this story.

The universe. So full of stars, planets, life, and mystery. A vast and beautiful realm.

Gazing up at the sky from a remote planet in one of the galaxy's outer arms was a small figure. It was male, had white fur on it's face, chest, and at the end of it's two tails as well as on it's ears, while it's fur was golden everywhere else, and it was wearing two red shoes, blue jeans and a white shirt.

It resembled a humanoid, bipedal fox. It's two tails were why it's nickname was 'Tails', although the figure's true name was Miles.

Tails just stared up at the sky, heartbroken. "Why? Why did you have to go? Why you out of all people?" Tails whispered. Only mere months earlier he had met... her, and although it was already a few weeks after she had been cruelly torn away, he was still heartbroken about the event.

He still remembered everything of it. How she came to Mobius, searching for the person who could wield the power of the Chaos Emeralds. Little did she know that Sonic had nearly been defeated in outer space using the power of said emeralds to keep himself alive up there. With little time, Sonic used the last bit of his power to send the emeralds away, deep into space, to prevent the enemy from finding them.

Even Sonic himself didn't know how he ended up safely back on Mobius shortly after, scientifically, he should've been killed without the power of the Chaos Emeralds protecting him. But while Sonic was battling in outer space, Tails had found her.

He had been building something when his computer systems, which he used to keep an eye out for hostile activity all across Mobius, went crazy. Tails learned that something had crashed in the Kerryl mountains.

He had been building an airplane, the X-Tornado, when it happened. Thus, he decided that he could use the opportunity to give it a test drive. He remembered how he had jumped into the cockpit and flown off. While it had taken some effort to get the plane under control, he had gotten the hang of it eventually. With the X-Tornado's jet plane design and powerful afterburners, flying to the mountains only took a few minutes.

When Tails got to the coordinates provided by the computer, it was hard to miss the plume of smoke rising up between the mountains. Landing the X-Tornado nearby, he ran to what he found out was the crash site of an alien spacecraft.

Without thinking, Tails had broken the cockpit window open and had dragged whoever was inside out of the burning spacecraft.

Tails took a good look at the alien. It appeared to be female, with pale skin and green hair. The alien was wearing a green-white dress made of a material that Tails had never seen before. It was fascinating.

Tails realized that the alien was unconscious, thus he brought her to his workshop, where he brought the alien to his workshop's guest room. After gently laying down the alien on the bed in the guest room, he continued working on the X-Tornado to add some more features, waiting for the alien to wake up.

She'd wake up several hours later, and by that time the X-Tornado was nearly finished.

"Where am I?" he had heard coming from the guest room. Laying down his wrench, Tails got out from underneath the aircraft and had walked to the guest room.

He had found the alien awake, and he saw it's two blue eyes look around in wonder, but he also saw fear inside of them.

Then she noticed him. "Who are you?" she said.

Tails took a step forward. "I'm Tails. Miles 'Tails' Prower. And who are you?"

"I'm... I'm Cosmo. Where am I?"

"You're in the guest room of my workshop. I found you in a crashed ship, in the mountains, and decided to bring you here so you could rest."

"O-Okay."

Tails had a storm of questions raging in his mind, about the alien's species and origin, but he had kept his mouth shut for the alien's sake.

The alien had stayed quiet as well, before eventually saying "Tell me... have you heard of the Chaos Emeralds?"

The events that followed, Tails shook his head and chuckled. How they had all traveled across the solar system to gather the Chaos Emeralds, how his relationship with Cosmo had grown to the point where he began to love her... and then how he had to kill her to stop the Metarex.

"That hurts the most, you know." he whispered at the stars. "That I had to do it. I know you begged me to do it, but... being forced to kill someone you love, you have no idea what that feels like."

He sighed. "All I know is... I miss you, Cosmo."

Then he noticed that the stars seemed to fade. "What?" he said as he got up.

He noticed how bright it had become. He actually had a shadow, even though it was midnight.

Turning around, he saw something insane. Downhill, a figure was approaching him. The figure was glowing, though Tails could make out that it had a humanoid shape.

He wanted to run, but found himself unable to, his body simply refused to react.

When the figure reached him, Tails saw that they were wearing some kind of battle armor. The figure was definitely much taller than him, just over twice his size, the figure was about 6'5 tall, towering over Tails, who was 2'7.

The figure stayed silent, and Tails took the moment to analyze the figure. Their face was hidden from view by black glass, likely it was only transparent from the inside. The armor itself was white, with blue plating in some areas. The figure also had a blue X running across his chest with some kind of emblem where the lines met.

Finally, the figure spoke. It had a male voice. "We can bring her back, you know."

"W-What?" Tails stuttered.

"The person you love, but that is no longer here. We can bring her back."

"How?" Tails immediately asked, though he was suspicious.

"By breaking the laws of physics. We can travel back in time to prevent her demise, though we need a lot of power to do it."

"Power?"

"The Chaos Emeralds. We need all seven of them."

"You can't possibly expect me to give seven of the most powerful artifacts known to exist to some random stranger!" Tails yelled.

"Your call." the figure said. "You want her back, or not?"

"Yes..."

"Then stop being such a fool. You can trust me."

The figure nodded. "The name's Hypernova. Trust me, I've done much harder things than traveling through time. I've saved countless civilizations already. I'm here because this is where I'm needed most."

"Wha-"

"The Chaos Emeralds."

"I... I... they aren't even here." Tails stammered. "Sonic scattered them across the solar system in the aftermath of the Metarex crisis to prevent anyone from misusing them again."

"Then we'll go get them. Do you know their location?"

"Uuh... I can find them, follow me."

As Tails walked away in the direction of his workshop, the light emitted by the figure faded. The figure chuckled darkly before walking after Tails.

Alright, this was WAY overdue. Therefore I really hope the fans from Epilogue 2.5 are still here. The least I can do is apologize for the wait and promise a much faster update schedule, as well as reply to the reviews per usual.

Fanfictionfan03: "Well just as I figure out why I could not follow the story comes to a close with that aside you made an amazing plot twist that has already built up hype for Epilogue 3"
Thank you! I hope the long wait didn't kill the hype, and that you're still here. If you're reading this, then welcome back, and sorry for leaving you hanging for this long.

Destiny W: "This was great, I can't wait for the next story. : )"
Thank you! I hope this first chapter lived up to your expectations!

Falcy: "I KNEW IT! BLACK IS BAAAAAACK! What? Did you really think I'd drop my suspicions? And just seeing Simon having to go somewhere far away for his friends' safety...feels sad. But anyhoo, keep it up!

P.S. I think I know the secret word! It's HEAVEN!

P.S.S. Hmmm...so Epilogue 3 will start in the Bogon galaxy, eh? Well, I for one think there will be a portal in Sonic's world somehow opened, causing him and his friends to get sucked up and into the galaxy! That's my prediction on how they'll meet, but hey. At least you've got something more creative than this. I think.

P.S.S.S. You voted R&C for game of the year? Cool! (And Ratchet, please don't break the poor fourth wall, although that might be funny xD)"
Thank you!
P.S. Bingo, ten points for you! :)
P.S.S. I've got quite a setting planned indeed. And a plot, oh goodness do I have plans for this!
P.S.S.S. Ratchet & Clank, Overwatch and Undertale all got my votes, I love those games to death!

Jadzia Ezri Dax: "I definitely wasn't expecting that. I feel very sorry Simon. No person should ever have to feel that way.
P. S. Do we get to submit Sonic OCs in Epilogue 3? I'm just wondering.
P. S. S. Alcyone, how did you know I was talking about you and Simon? Hm?
P. S. S. S. I've never read Romeo and Juliet, but I read a Shakespeare play once. I barely remember any old English in it though.
P. S. S. S. S. I don't mind my OC not appearing yet. See you in Epilogue 3!
P. S. S. S. S. S. "Buuuuuurp!" That was... my Sonic Erupter blasting... uh, Tachyon!
Tachyon says: "Stupid human! That smells!"
Hahaha, lol. :)"
Well... no, I'm not going to spoil it.
P.S. Hmm... I gotta think about that to be honest. At least not these first few chapters, I'm afraid.
P.S.S. Pleione: "I'm sorry, but Alcyone has not been feeling well as of lately, therefore I am here. Since I am not her, I am afraid that I cannot answer that question for you. Again, I apologize, but I'm afriad you will have to wait until she is feeling better to get an answer. I hope you understand."
P.S.S.S.S. Your OC will appear soon enough now! And it's Epilogue 3 at (way too long) last!
P.S.S.S.S.S. I don't blame you for shooting at that guy and his sorry mug. If there's one character I hate, it's Tachyon. So go ahead and blast his sorry face again, I definitely won't stop you!

Max Chronicle: "First order of business: 'Vehena'. What is 'Heaven'?

Second order of business: BLACK HOLE IS BACK (INSERT RIDIKEULOUS #S OF EXCLAMATION POINTS)...I think. If true, go to two. If not, go to one.
One: False alarm.
Two: WHAT WILL IT TAKE TO END THAT FOOL?!

Third order of business: "Simon, you once said you immortalized yourself to do the right thing; to be a hero. At what cost did that come? Show me the lives who've met their end because of you."

Fourth order of business: Well TWG, today you have succeeded in building up my hype to part 3 of Epilogue. See you there.
Max out."
It is, ten points! As for your assumption, you'll have to wait and see. And indeed, many have met their end because of Simon, however, all of them were evil. His weapons cannot even harm good people. And I hope the long wait didn't kill the hype.

The next chapter is already in the works, so it should be here soon enough. And trust me, there's much more to the plot than you may think...