Y/N is all ready and packed up as she, Sonic, and Amy are going into the multiverse Moebius. Though, she couldn't help but think about Scourge and the first time she get to see him cry. Her thoughts was cut off by Sonic and turned to see him uncomfortable with Amy grabbing his arm with a lovable expression.

"Are you-- um-- ready, Amy?"

"I'll be with you, Sonic! I'll be ready for anything!"

Sonic whispered to Sally.

"I thought this was a solo mission with me and my sis."

"You'll need back-up on a hostile world we know little about. Besides, Amy's been dying for more time with you." Sally smiled slyly.

"You're cruel."

Y/N snickered, making him glare at her.

"How are the secondary star posts looking, boys?" Sally asked Rotor and Tails who're building the portal.

"I think we're done, princess."

"All set to head to Moebius!"

"Just a heads-up— We don't know where on Moebius the portal will drop you, so be careful."

"Lovely. Thanks for that, Rotor, on that note, here we..."

Sonic, Y/N, and Amy jumped through the portal to the hallway surprisingly.

"...go?"

"Whoa. Fancy." Y/N commented, looking around.

"You know, the way Rotor put it, I was expecting something more... perilous."

"For an evil alternate dimension, it's really nice looking." Amy said, looking at the portrait.

"Don't let your guard down though. Who knows who's out there to—"

"Hold it right there!"

"Now that's more like it!" Sonic grinned.

The trio hedgehogs dodged the punch from the blue E-123 Omega.

"Ain't nobody gettin' a drop on the doctor!"

Amy knocked the robot with her hammer along with Y/N slicing the back of the robot with her katana as Sonic spin dashed the robot in the face.

"Want to be this hunk of junk means Anti-Robotnik is here?"

"Yep! It's about time he built a 'bot."

"You ain't layin' a hand on him!"

Anti-E-123 Omega spray out green stuff on Amy's and Y/N's legs and it went frozen as they're stuck. Then the robot floated Sonic in the air as he look dizzy.

"And you can just sit a spell!"

"Whooga... Not cool..."

Jus then, Dr. Ivo Kintobor runs in.

"No, Buns! Stop! They aren't enemies!"

The robot lets go of Sonic.

"You sure, Doc?"

"Positive. This is Sonic the Hedgehog from the Prime Zone." he said, helping Sonic up.

The robot punched the green stuff to free Amy and Y/N.

"Oh. Sorry 'bout that. Can't see colors too well in this thing. That riot foam firms up pretty nice, didn't it?"

"Thanks for the save, Doc. Your versions of us are making trouble back home. We came to see if we could find something here that could stop their invasion." Sonic said.

"I thought Scourge and his Suppression Squad had gone unusually quiet. You have my deepest apologies. Please, shall we continue this outside? It's such a lovely day."

They all went outside to the Grand Forest.

"This is your first time in our zone, isn't it, Ms. Rose?"

"Yes sir, it is."

Kintobor turned to Y/N.

"You must be his sister Y/N the Hedgehog Sonic has been talking out."

"Yes. Nice to meet you."

"It is a pleasure to meet you as well. Allow me to introduce to my world. I am Dr. Ivo Kintobor. I run the hospital tower we just came from. It houses the force-field generator I used to protect the Grand Forest and all the Moebians who fear King Scourge's tyranny."

"Wow, I can't even see the field." Amy awed.

"Good! You're not supposed to."

"What can you tell us about Scourge and his latest batch of craziness?" Sonic asked.

"Yeah. Even Scourge is much more aggressive than I have ever seen him." Y/N said.

Kintobor sweatdropped in nervousness.

"That's my fault, I'm afraid. They stormed my tower and managed to steal my experimental globe posts. They must have used them to cross into your zone."

"They're jerks. We understand. What did you need those posts for?" Amy asked.

"I had hoped to search other zones for new medical techniques. I need something to heal Buns Rabbot."

"Come to think of it, I didn't see the Anti-Bunnie with the stupid squad. Where is she?"

"Right here."

E-123's head opened to reveal Buns Rabbot with purple eye shadows.

"Not long ago, I developed N.I.D.S. Started in the base of mah spin. Scourge kicked me out and left me for dead."

"That's terrible!" Y/N gasped.

"I know. The Doc here took me in and built me this suit."

Kintobor smiled embarrassingly.

"It was the least I could do. My Omega Care Unit creates a stasis field that prevents her condition from progressing and supports her immune system. But she is still mostly trapped within the at robot body. I will not rest until she walks freely once more."

"And 'til then, I'll protect the Doc from those back-stabbin' so-and-sos!"

"I am still not pleased arming Omega, but at least she only wields non-lethal weapons."

"Like that quick-hardening riot foam! Ick!" Amy stuck her tongue out in disgust.

"It was disgusting." Y/N agreed with Amy.

"And the dizzy-making soundwaves. Cool. That explains how this all started. But how do we stop it? Is there anything here that could throw Scourge off his game?" Sonic asked.

"Maybe more of those robots?" Amy added.

"No, no. I named it "Omega" because it was a last resort. I refuse to build an army." Kintobor glared.

"They could try to recruit you-know-who." Buns suggested.

"Absolutely not! She's far too dangerous! Don't even joke like that!"

"Sounds like just the kind of peril I've been looking for!" Sonic grinned.

Y/N smacked his arm.

"Sonic! We don't even know what she's capable of! She could be much worse than Scourge. But we do need more allies as we could."

"Please, Dr. Kintobor! They've taken Freedom HQ and may press on at any minute. We need any lead you can give us." Amy begged.

Kintobor had a thought for a moment before he replied with a scared look.

"Rosy the Rascal. The Anti-Amy. She hates Scourge."

"Yikes. Don't like the sound of that name." Y/N winced.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sonic, Y/N, and Amy are packed up ready to go meet Rosy as they're outside of Kintobor's Tower.

"Thank you, Doctor!" Amy smiled to Kintobor who's adjusting the backpack for her.

"So where do we find Rosy?" Sonic asked.

"My best guess is Castle Acorn. She stalks Scourge relentlessly, and that's where he was last seen."

Kintobor turned to Buns in a mecha suit who's also ready to go with them.

"Are all your systems running? Are there any tuneups you need? Perhaps if I ran another diagnostic..."

"Don't you worry none, Doc. The bot's fine, and I'll keep the do-gooders safe."

He turned to Sonic and Y/N as he help strap up their backpack.

"How do you intend to get back home? Is your pack chaffing?"

"Hopefully your globe posts are still up and running at the castle. We'll be okay." Y/N assured him. "We've dealt with far more worse than this."

"Can we go now?" Sonic impatiently asked.

Kintobor nodded and Sonic, Y/N, Amy, and Buns take off to the Castle Acorn.

"Slow down! It's like you know the way already!" Buns exclaimed through the robot.

"This is Anti-Moebius, right? Our Robotropolis was from the Great Forest, which puts your Castle Acorn the same distance from the Grand Forest."

Shortly, they made it to the abandoned and damaged Castle Acorn they never imagined it would be. Little did they know, someone is watching them from the distance.

"Crimes... How could you stand to live in such a dump?" Amy asked.

"Never was a fan of your cushy lifestyle. 'Sides, it's a castle." Buns said.

They all went inside. Y/N looked around cautiously as Sonic lead the way while Buns and Amy bicker about the taste in the castle they're in.

"Y'all see a dump. Ah see the freedom to do whatevah ah want."

"And you didn't want a decor that wasn't falling apart?"

"It's symbolic!"

"It's depressing!"

Sonic and Y/N glanced to the side to see a shadow figure ran past by from behind the pillar.

"Yo, ladies! Did anybody see that?"

"Yeah. We just saw someone ran past by."

Then, a creepy singing voice echoes the castle.

"Deep inside the🎶Castle Acorn...

🎶Invaders🎵sneaky-creeping...

🎶They don't see my mallet🎵coming..."

Buns pointed at something ahead.

"Tracked the source. Throne room."

They immediately ran over as the song ends.

"🎵Pop! Go their he-ads!🎶"

Sonic and Y/N kicked the door open of the throne room.

"Rosy the Rascal, I presume?"

"You'll forgive us if we don't call for an encore?"

There sat on the throne is Rosy the Rascal, lying on her back and had a disappointed look. She wears a green and white shirt, yellow skirt, white gloves, blue shoes, and red hairband.

"Oh, phooey. You're not my Scourgey. My Scourgey ran away, you know."

"Er-- Right. That's why we're here. We were hoping you'd help--"

Rosy cut Sonic off.

"Scourgey is always so mean. He ignored all my attacks when I was little... I used the magic in a special ring to make myself older. Now I'm a big girl with a big hammer and still Scourgey runs away."

Y/N gulped at how freaky Rosy is. She's not the only one as Amy cringed at the memory that's different than Rosy's.

"That's kind of like what I did, only she makes it sound creepy."

"Ditto."

"And given this zone, I'm willing to bet there was some kind of side-effect." Sonic said.

Rosy immediately stood up with a creepiest smile on her face as if she remembered something.

"Oh yes! It broke my brain allll to pieces! Shatter-shatter!"

She lifts up her big green hammer with sharp ends.

"SO NOW I BREAK EVERYTHING ELSE! EEE HEE HEE!!"

"Yikes! Harley Quinn 2.0!!" Y/N shrieked in fright.

Rosy swung her hammer towards them and they quickly dodged it as the spike smashes the ground, creating a huge crack.

"SMASHY-SMASHY! EEE HEE HEE!"

Sonic jumps over her as she swings her hammer again whilst Y/N flipped further away from Rosy.

"Hold it! We came here to ask your help to stop Scourge!"

"You're a Sonic! My Scourgey is a Sonic! I WANT TO SMASH SONICS!"

Y/N blocked the hammer by punching it away with her giant fist whip.

"But Scourge is the evil Sonic! He'a the good one!"

"Yeah! The likeable one! Lovable, even!"

"🎵Still a Son-ic!🎶Still squish-a-ble!"

Amy comes over.

"But I'm not a 'Sonic'. We're like sisters nearly!"

Rosy turns to her.

"You're breathing! That's good enough for me!"

She charges her with her hammer raised, causing Amy to cling herself onto the old brown curtain.

"EEK! Buns, help!"

Buns runs in.

"Whoops! Ah said ah'll protect y'all, didn't ah?"

"I sure hope things are going better back home." Sonic said.

"Yeah, but let's not jinx it." Y/N said.

He nodded and called over to Buns.

"Hit her with that quick-drying riot foam stuff!"

Buns immediately shot out green stuff, trapping Rosy by the feet.

"Ah wish ah'd been outfitted with somethin' a bit more proactive like a missile launcher or somethin'."

"No-no-no! This is no fun!"

Rosy smashed the green frozen stuff into pieces. Amy quickly jumps in and hits her hammer against hers as they clash in unison.

"STOP THAT!" Rosy shouted.

"Go find Kintobor's Star Globe Posts! I'll keep her busy!"

Sonic and Y/N nodded and runs off.

"Right! Let's go, Buns!" he said.

"You sure she'll be okay?" Buns asked in worry.

"Positive. Amy can handle herself." Y/N assured as Buns follow after them and lead the way.

"Do you know where they would keep them?" Sonic asked.

"Miles and Boomer had a lab set up before ah got kicked out of the group. It should be right over there."

She was right as they found the Star Globe Posts.

"There's the globe! And they're already activated!"

"Maybe they wanted to keep up a supply line?" Buns guessed.

"Too bad for them. One second while sis and I check out what's going on back home."

"Ah'll cover you."

Sonic and Y/N made it through the portal back to the Freedom HQ - Brain Trust Lab.

"Sweet! It's good to be back!"

Y/N's ear twitched and turned to the open doorway.

"And it sounds like there's a fight going on."

They peeked through and were surprised to see Freedom Fighters and Suppression Squad working together to beat up Scourge and Fiona as they fought. Scourge punched Boomer as he look beyond angry and betrayed.

"@#$% TRAITORS!"

Scourge knocked the barrier off from Bunnie, causing her to be pushed back.

"I took down a whole planet! A planet!"

He kicked Alicia away.

"And you morons think you can take me? Me?!"

Scourge spins himself to kick both Tails and Miles.

"Sonic can't take me! And you still try to take me out?!"

He elbowed Boomer in the stomach before he could blast him with his sonic boom.

"You could have served the baddest king ever! Now you're just gonna get served!"

"Yikes." Y/N cringed.

"Okay, I'm lost." Sonic commented.

Just then, Nicole appeared on the screen.

"Sonic! Y/N! You're back!"

"Nicole! We need some narration, stat!"

"The Suppression Squad has mutinied! They want to drive Scourge back to Moebius."

"Whoa, really?"

"Sweet!"

"What about your mission? You two weren't gone long."

"Eh... partial success? Listen, can you keep the portal open?" Y/N said.

"It's tricky, but I think I can maintain the link. There seems to be some kind of boost coming from the other end."

"That would be the globe posts." Y/N said.

Sonic and Y/N runs off to join in the fight.

"Now if you'll excuse us, we've got a doppleganger to bust!"

Fiona suddenly appears before them and blocks them with her boot brought out to kick them as they immediately stopped.

"Not so fast, you two!"

"Whoa! Fiona?!"

Y/N growled, not wanting to talk to her and began charging her, surprising Fiona and Sonic.

"Out of my way, you traitor!!"

She punched Fiona to the side to make her move aside as she got out of the lab to the fight that still went on.

"Yo, Scourge! Miss me?"

Scourge turned to her in surprise.

"You--!"

Y/N kicked him square in the chest, causing him to cough out spit. She then brought up her whip. Scourge got up with a grin and cracked his knuckles.

"Alright, N/N. Let's dance."

Back to Fiona and Sonic as he dodged the kick from her.

"Wait, so you're not part of mutinity? Why?! You're not even from Moebius!"

"What is your fixation with loyalty?! I don't owe you or this world anything! Every time I trust somebody, I get burned! You, my parents, my partners, everybody! So you know what? For once I'm not trusting and relying on anyone!"

"Except Scourge and Y/N. You sure are fighting awfully hard for him. Or maybe for Y/N mostly since you've been trying to convince her to join you when she won't."

Fiona began to tear up a little. She quickly shook it off and tried to punch him but he dodged that.

"It's not like that!"

"You keep telling yourself that."

Amy pops her head out from the globe posts.

"Sonic! Hurry!"

"Whoops! Looks like I took too long. Can't have that."

Sonic tripped Fiona with his spin dash.

"'Scuse me, Fiona. I've got work to do."

Sonic runs in to see Scourge and Y/N wrestling by gripping onto each other's hands, struggling to push each other down. She noticed Sonic is here and with all of her strength, she managed to push Scourge towards Sonic as he punched him right in the cheek. All of the sudden, Sonic, Y/N, Scourge were blasted by the sonic boom by Booner as they went unconscious.

"At last! Get them out of here, quick!"

Miles carried the trio by the quills.

"Right!"

He then threw them towards the globe posts where Amy was who still had her head out.

"Bon voyage, hedgehogs!"

"EEK!" Amy shrieked and quickly move back as the trio fell to the ground before the portal was closed behind them.

Amy helped Sonic up.

"Sonic! Are you okay?"

"Wonderful. Once all the bones in my body knit, that is."

"They're dead..."

They turned to see Scourge getting up as he grabbed his crown.

"Once I get my hands on them there won't be enough left to..."

"Get... off of me!"

He looked down to see Y/N beneath him as he realized he had his hands both sides of her head. They were looking at each other straight in the eyes until Scourge gave her a tease smirk.

"Well, this is quite a turn of events."

"Oh! Don't you think about it!" Y/N growled, trying to push him off but he just stay there like this.

"LOOK OUT!" Buns called out.

Scourge immediately stood up and helped Y/N up as he look to where the direction is with fear in his eyes as Sonic and Amy looks on as well.

"Oh, please no..."

"I couldn't stop her!"

Buns' mecha suit was badly damaged and ripped apart as Rosy stood holding her hammer with a huge scary smile.

"Scourgey! I've been saving an extra-special smash for you!"

"Oh boy..." Y/N gulped.