On Mobius, Uncle Chuck plugs in two cords, and he looks at Rainbow Dash and yells, "Now Dash pull it! Sonic hit 1-6-6-7 on that computer!" Rainbow and Sonic do their tasks at the same time but the machine he created, which is a chrome ring suspended above a staircase, fizzles for a moment, powers on and crackles with electricity before failing. Uncle Chuck snaps his fingers, "Darn, not enough wattage it seems. Its gonna need some adjustments."

At the same time on Equestria, Twilight has converted most of her library space into a wild magical laboratory, papers and pipes scattered all over the ground, She scratches her chin, "Maybe a different methodology? No. Is the thought process different? No that's not it either."

Spike looks at Twilight worried, "Hey Twilight, maybe you should take a break, you've been at this for two whole days." Twilight with bags under her eyes says, "I know Spike, but I feel like I'm on the brink of figuring this out, I have the functionality, I don't know where it goes, but I do know that crossing through that mirror transforms you into something else and that would leave us wide open if those robot monsters' master shows up, I'm trying to reverse that process, but so far it isn't working I need to come at this from another angle."

Spike then thinks, "What if it uh, didn't… mirror?"

Twilight's eyes open in realization, "You're a genius Spike!"

"I am? Oh cool, I guess I am." He says with an overblown ego.

Then on Mobius, Uncle Chuck fiddles with a bunch of wires and cords, his eyes widens as he yells, "Oh darn it!" Sonic looks over, "Hey what's wrong?"

"The cord I purchased is too out of date, and I don't have the proper adapter. Hmm, I'm a little out of practice, I may need Tails to finish this."

Sonic nods sadly, "Yeah, I haven't heard anything from the hospital where him and Knux were at."

Then when they say that. The door to Tails' workshop opens, and Tails is standing in the doorway, his arm, torso, and head are covered in bandages. He's panting and sweating.

"Tails what are you doing here?" Sonic asks

Tails stops panting when he hears Sonic and he looks at him, Tails lower lip starts quivering and he starts bawling his eyes out, jumping into sonic crying into his shoulder. Sonic pats him on the back as he cries out, "I thought you-you were dead, I couldn't find you on the monitor and-and-and the portal's signature wouldn't show up." Sonic stops him, "Hey, little buddy, I'm here and I'm not dyin' anytime soon."

Tails stops crying as Sonic and Tails sit on the floor. Sonic then asks, "Are you still sick?"

Tails shakes his head and says, "Oh not anymore no, I was discharged earlier today. I flew here with my own tails, after Knuckles told me you were here. He's also okay but he's still recovering, he took a lot of damage."

Sonic sighs in relief, "Good, I'm glad you two held that big guy off. Also did you meet my new friends, Rainbow Dash, and Pinkie Pie?"

"Oh, yes. I had figured they were from some other world, Knuckles told me about them, I'm surprised that they are so strong with chaos energy."

Then tails looks over and sees Uncle Chuck, looking under a device. Tails then says, "Hey Uncle Chuck!"

Uncle Chuck responds, "Hey little Tails, could you give me a hand with the ol' machine, I'm tryna get Dash and Pinkie back to their home, Equestria as it's called."

Tails stands up and wipes his tears on his forearm then looks at all the machinery, "I think that wire there goes there… and what program are you using to control the portal's frequency?"

"I was using , Did I overlook something?" Uncle Chuck says this as he plugs the cord he had in his hands into a different area, then Tails steps over him and walks up to the computer, "I think you used the wrong 'Moebium'," his fingers dance across the keyboard like a pianist, "Oh. You used the right program, it just needed an update, and the launcher was bugged, so I just made a patch. Its updating now." Tails then pushes a button as Uncle Chuck pulls a lever, and the portal lights up with a silvery light.

On Equestria, Twilight stares into the mirror, she breathes out and then her horn glows purple as she casts an improvised spell and fires into it, the mirror turns black first, and then it crackles with static but as the static goes across the surface of the mirror stops reflecting and begins to glow with a silvery light.

Twilight whispers to herself, alright now to test it. She levitates and throws a balled-up piece of paper through the portal, on the other end, where Tails, Sonic and Uncle Chuck are standing, a wadded-up piece of paper shoots through the portal. Tails unfurls it and reads aloud, "'Dear Princess Celestia, today I learned the value of compashin.' Huh."

"Hey, I know that name! That must mean the portal worked!" Sonic says excitedly, he peaks outside to see Rainbow Dash lounging in a hammock.

He yells out, "Yo, Dash! Portal's workin'." She flies out of the hammock and lands in front of the door, "Well what are we waiting for?" Sonic lets her in and is about to let Rainbow Dash step through it, before Sonic asks, "Wait what about Pinkie?"

"She was hangin' out with Amy and Big at the lake. She's been havin' a good- ". Then Sonic vanishes in a blue blur then comes back with Pinkie in his arms, at this moment Pinkie is wearing a camo bucket hat continuing her conversation as if she's still there, "-then Rarity laughed so hard she shot her smoothie through her nose it was so funny!" Pinkie Pie looks left and right "What the- Sonic, what's the big idea? I was telling Big and Amy the funniest story!"

Then she sees the swirling portal, "Oh." She looks kind of sad, "Can I least say bye to everypony?"

Sonic lets her down and smiles and says, "If everything works out, we should be able to come back and forth but you two should go through first."

"Hold that thought Sonic, we don't have enough power for continuous travel, we'd need a… Chaos Emerald, which may be in short supply." Tails says with a pained expression.

"How many trips are there?" Rainbow Dash asks Tails.

"Well, from what I can see, there's only three. Which is serendipitous if Sonic does want to go back," Tails then turns back, "but until we find a sufficient power source over here, it's a one-way trip for a long time."

Sonic gets an idea, "Dash, I got a plan."

"What's your idea, Sonic?" Rainbow says in excited curiosity.

"What if we stuff one of those Elements of Harmony in there, Colin's journals said there were like Chaos Emeralds."

Rainbow says, "I can do that, should be a piece of cake!" then she takes off and blips into the portal.

As this is happening Twilight writes down a note, and talks to Shadow, Silver, and Spike. "Thanks for getting the guys, Spike." Spike's smugness hasn't worn off as he says, "Wasn't a problem, Twilight, 'specially with how tight me and the boys are," he holds up a fist bump to each of them, Silver gives him a fist bump without hesitation, but Shadow glares at Spike. In response, Silver makes Shadow do it with telekinesis, Shadow fist bumps Spike, but yanks his hand out of the telekinesis.

Twilight then says, "So by my estimations, based on the strength of my spell, and the strength of the previous enchantment, only three ponies can use this portal."

As she finishes her last syllable Rainbow Dash then blasts through the portal, and Silver catches her with his powers, before she can slam through the bookshelf.

"Make that two 'ponies'." Silver says with a nervous grin.

"Rainbow? Oh my gosh are you okay?" Twilight asks.

"Ugh, my head is spinning…" Rainbow Dash says this as she lulls her head back and forth. Then she shakes her head and flies up to Twilight, "Twilight that Tails guy needs a Harmony Emerald, err, an Element of Chaos, wait no, I need an Element of Harmony."

"Woah, woah, Dash, slow down. Who's 'Tails' and what does he need again?" Twilight looks at her with concern.

Rainbow Dash, clears her breath, "So, in our fight with a guy named Fist, Fist took Sonic's Chaos Whatevers, so we need an Element of Harmony, like maybe mine or Pinkie's, something like that."

Twilight looks down, "Dash, the Elements of Harmony aren't anyone's anymore. I'm sure you felt it on Mobius. In the state they are in, they are far more dangerous."

"Yeah, well this portal has to stay open, or we can't visit Mobius." Rainbow Dash says with concern .

Shadow then speaks up, "If we don't have the full set, none us can access our super forms."

Rainbow Dash then yells, "Okay then, smart guy, what's your idea?"

Shadow crosses his arms, "Obviously we need Sonic to fight, and Pinkie lives here. If you passed through portal, that means only two people can pass through. Therefore, Sonic and Pinkie should come to this side. We'll figure out a way to get back later, as long as we have the emeralds then Mobius is safe." Shadow walks forward, "Think about it, our enemy does not need portals to get between worlds, he has another method involving this 'Chaos Void' I'm sure. If he needs both sets, we need to find the Master Emerald here as soon as possible."

"Well there's one more problem, how are we supposed to tell them that?" Rainbow Dash says while crossing her arms like Shadow is.

Then a device gets thrown through the portal. Its plastic frame clatters to the ground and slides between Shadow and Rainbow.

The black screen turns on to see Tails' face along with Sonic in the background and Pinkie bouncing around, Tails then says, "Connection test. Check one, two. Anyone there? Sonic, Silver, uh, Rainbow Dash? Respond."

Rainbow Dash gives it a suspicious look as Shadow picks it up. "This is Shadow."

"Oh good, With the portal open our P.D.A.s have full signal with each other. Where are you at right now Shadow? Is that a library?"

Shadow points the P.D.A. at the modified mirror, then Tails says, "What the heck am I looking at, is that a mirror?"

Twilight walks over, "Shadow can I see that thing?" Shadow hands over the P.D.A. and Twilight magically takes the PDA and the two talk about the set-up to their respective portals, and how they were made with Uncle Chuck also talking about his process. Twilight then says, "That's why our portals connected, they are operating on the same frequency, I wonder if I could change the spell just a bit to give you full functionality with your tech."

Tails then lights up, "You should try it, I'll adjust the program on my side, maybe if they are more aligned the efficiency output would be much greater considering our limited energy."

Through a coordinated effort the pair of prodigal geniuses find a way to format the portal so that both sides can operate it with equal authority.

"With the adjustments me and Tails made, we can make two more trips, meaning it has only four uses. I think we should keep one available, so the P.D.A.s still work." Twilight says.

Shadow smirks, "That's back up. we could get Sonic and Pinkie over here, as well as Knuckles, we need his strength on this side."

"Actually Shadow, Knuckles is… still really hurt from fighting that Fist guy." Tails laments

Shadow snarls, "Damn."

Then on the P.D.A. everyone loudly hears, "Sonic the Hedgehog! Why did you take Pinkie away from our lunch?! She was telling us a really funny story!" Amy says with an annoyed tone, "That's what I said!" Pinkie Pie says loudly, Sonic tries to defend himself, "Amy, we just figured everything out, things might get really bad soon and I may need to go back to Equestria." Amy looks at Sonic with an even more incredulous look, Tails then looks at Amy and says, "Amy there gonna need some muscle over there, you should go with them."

Amy looks at the portal, then she looks back at New Mobotropolis through the doorway, "But what if something happens?"

"Don't you worry Amy, worse comes to worse one of you power houses can come on back, besides Tails is no pushover." Uncle Chuck says, "Sonic might need ya over there and your new friend prolly would be sad if you weren't there."

Amy smiles and nods giving a thumbs up to Uncle Chuck, "You're right. Thanks Chuck. Let's go fellas."

Sonic, Amy, and Pinkie Pie Jump through the Portal, leaving one use left and an open communication to Equestria secure.

As they all get their bearings and greet each other, say hi to one another. Ponyville shakes and trembles, the Mane 6 and 4 Freedom Fighters converge on a form that craters itself in the middle of town square.

They see a body surging and pulsing with pitch-black energy, it convulses on the ground until the ones that fought Neo Lix recognize less than half of his corpse, but his jerky and twitching motions betray the movements of an independent lifeform looking more like a puppet on strings. A corpse being manipulated.

The body stands on legs made completely of darkness, the only body that is shown is the burnt left half of Neo Lix's chest, neck, and head, where the flesh and limbs should be is replaced by ever moving darkness. His eyes open, though they aren't his they are red with green pupils.

The eye locks on to all ten of his foes.

Then it speaks as a white line forms its mouth in the darkness moving as it talks. "Ten champions guard my final objective." Its body twists, "How will I compete?" then it laughs, "They don't know where the Equestrian Master Emerald is, like I do. So I will make it fair for everyone."

It looks directly at Sonic, "You. Your world will be annihilated. I will be rid of these gems, all of them. Forever. I will use Mobius as a bomb and shatter them to unrecoverable pieces." his eyes scan the crowd to Twilight, "I rule this world, I allow it to have the final breaths of life for a billion years as I detonate the night sky one star at a time, Ponykind will bear witness to a starless oblivion. Then die to the cold."

"I will be back in two months. Hope you can find that Master Emerald in time." Then it laughs, it laughs and leans back tearing at its own face, every living thing in a mile can only feel one thing irradiating off of this grotesque being. Hatred. Then the body crumbles to dust and blows away in the wind, leaving behind traces of a malevolence beyond belief.

The Ponies and Mobians now have a limited time to complete their task.