MeteoTech Premises. Robots are everywhere on the assembly line. Sonic, Tails, Knuckles and Amy are hiding behind a big door, along with Y/N after she caught up to them. Sonic and others are relieved that she's okay.

"Looks like we'll need to watch our step." Sonic said quietly.

Amy tries to take a closer look as a surveillance camera detects the Babylon Rogues behind them. Knuckles pulls Amy back.

"Dang!"

SCR-GP robots start to rush towards Sonic, Y/N, and their friends but they pass them.

"Look out!"

Sonic turns and looks behind him as the robots passed him.

"What?"

The robots stop in front of the Babylon Rogues.

"That's...!"

Jet performs Gravity Control and destroys the SCR-GP robots with his fellow members. Then they landed in front of Sonic, Y/N, and their friends.

"It's been a while, Sonic the Hedgehog." Jet smirked.

"Jet!" Sonic exclaimed.

"Jet!" Y/N exclaimed in happiness and surprise.

This made Jet smirk wider and walk up to her. He cups her cheek, making her blush and shocking Sonic, Tails, and Knuckles.

"Nice to see you again, Y/N. You look good in that outfit."

"Hey, hands off of her!" Sonic glared at Jet, activating protective brother mode.

He ignored and kept on flirting with Y/N.

"Long time no see, shorty." Wave smirked.

"Wave!" Tails exclaimed.

"We're here to settle the score from last time!" Storm stomped the ground to intimidate Knuckles.

Knuckles brought up his fist.

"Any time, Babylon Rogues."

"Cut it out, Storm!" Jet scolded Storm and turned to Amy. "Alright, girly, hand over the Ark of the Cosmos!"

"Huh?" Y/N questioned in confusion, raising her eyebrow.

"What are you talking about?" Amy asked, looking confused and mad.

"Don't play dumb! Not after swiping the Ark of the Cosmos right out of our hands!"

"Hey, hold up a minute." Sonic intervened. "Girls hate guys who rush them, Jet."

"Rush? Heh, I'm the fastest thing in the universe! And today, I'm going to prove it!" Jet declared.

"Alright, guys, enough!!" Y/N yelled, surprising everyone as they immediately went quiet.

"I know we are having a great reunion, but we have robots to deal with! And Jet, what do you mean by the Ark of the Cosmos?"

Before Jet could explain, a security alarm goes off and several robots begin coming towards them as Y/N thought so.

"Sonic, Y/N's right, we can't stay here!" Tails warned.

"Looks like we'll have to do the reunion later. See ya, Jet!" Sonic said, running off.

"Let's go!" Y/N said, running off as well.

"H-hey! Wait!" Jet exclaimed, running after them.

Sonic, Y/N, Jet, and the others ran down the path ahead on their Extreme Gear. Amy tries to join them, but Storm blocks her way.

"Oops, can't let you past until you hand over that stone, little lady."

"Hey, out of the way, buddy! I'll lose sight of Sonic!"

Amy pulls out her hammer and hits Storm. Amy starts running away and Storm staggers behind her.

"W-waaait!"

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

Sonic, Y/N, and Jet are riding on their Extreme Gears down a path.

"You two can use those powers, too?!" Jet asked in shock.

"Pretty handy, really." Sonic said.

"Yeah, it's awesome." Y/N said.

Sonic repels some robot with a burst of gravity. Y/N did the same to other more robots and swung her giant fist whip, destroying them. In a room, Eggman is working with his computer.

"Engage EM algorithm, maximum value. Access mother computer. Mother computer access denied."

"Why!?"

Sound of crashing is heard.

"Hmm? What's this racket, and now of all times?!" Eggman said, standing up.

Eggman goes to the door and the door opens. He looks somewhere while he is confused, when Sonic, Y/N, and Jet come through and hit Eggman with their Extreme Gear, sending him backwards into his computer's key board.

"What went flying just now?" Knuckles asked.

Eggman gets up and sits on his chair.

"Do I look like a ball to you?!"

"Eggman?! What are you doing here?!" Sonic asked in shock and anger.

"What do you mean? I own this company! Ahh ha ha ha!"

"What?! So you're the ringleader behind this one too, Eggman?!" Y/N growled.

"Ringleader? What the devil are you babbling about?" Eggman asked.

"Come on, cut the act. I'm talking about the global robot rampage!" Sonic glared.

"You must be joking. That's been quite a headache for me as well."

"Like we'll believe anything you say!" Knuckles yelled in anger.

"Calm down. We go way back, don't we? I'll let you in on something. Not even I know why are they've gone amok, but they appear to be following a leader." Eggman said.

"A leader?!" Sonic then remembered SCR-HD. "...Well, I guess for now we'll buy that Eggman isn't involved."

"So maybe that has nothing to do with the robots that attacked us..." Tails said.

Sonic holds out his Ark of the Cosmos as well as Y/N.

"Wh-where did you two get that?!" Eggman stuttered.

"So you were holding out on us, Eggman!" Sonic glared.

Knuckles threatens Eggman by cracking his knuckles.

"Spill everything you know. Now!"

Y/N threatens Eggman too by bringing out her katana towards his face.

"Or else there will be consequences!"

Eggman immediately starts working with his computer.

"Very well. I'll tell you..."

A picture of the mother computer room starts coming into the view.

"All robot activities within my facility is normally controlled by the mother computer. As the core of MeteoTech network, it was supposed to be the perfect computer. But as of a few days ago, I've been unable to control it remotely."

The power unit within the mother computer is shown.

"The power unit within the mother computer is a stone identical to the one you're holding. According to my analysis... That stone can covert huge amounts of mass energy into other forms of energy, and exudes a unique magnetic field..."

"Huh??" Knuckles questioned.

"Shut up and listen!" Eggman snapped.

Several SCR-GP robots led by SCR-HD are shown.

"If my deductions are correct, the robots' leader is using the world's robots in an attempt to collect these strange stones from around the globe."

"So why do they need the stones?" Sonic asked.

"That even I don't know." Eggman replied.

"...They're drawn to one another." Jet said.

"What?" Eggman asked, turning to him as everyone else look at Jet.

"These aren't just some rocks. They're spoken of in Babylon clan legend as... Ah! That's right! Girl, give me back the Ark of the Cosmos!"

Everyone look back to find Amy not here with them.

"Amy's gone!" Tails gasped.

"Storm's not here either!" Wave gasped.

"Sounds like we've got a fix on the robot leader's location."

Eggman starts working with his computer again.

"Satellite monitor on!"

Three points - one red, another grey, and the last magenta - are marked on the computer screen. The first shows a picture of SCR-HD, the second shows Storm, and the last shows Amy.

"Amy!!" Sonic, Y/N, Tails, and Knuckles shouted.

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

Amy is running from Storm.

"Wheeze... Hold up!"

"Ugh, do you ever give up?!"

Amy stops up.

"Fine, if you want it that bad, I'll give it to you!"

Amy throws the Ark of the Cosmos into Storm's face. He falls on the ground unconscious.

"Where the heck am I?" she asked, looking around.

Storm wakes up and finds Amy looking angrily at him.

"Thanks to you, I got separated from Sonic, you big jerk!"

"Uh... Um..."

She pulls Storm back on his feet.

"So you're going to find the way out. Am I clear?"

"C-crystal clear, ma'am, sir!"

Storm goes ahead and Amy follows him down a path. The scene shifts to Amy and Storm further down the road, where noise of a robot is heard.

"What's that noise?"

SCR-HD comes towards them. It stops in front of Amy and Storm as it scans them. When it discovers Storm's Ark of the Cosmos, it suddenly explodes and falls to the ground. Amy and Storm walks up to SCR-HD. Storm sees an Ark of the Cosmos in robot's back.

"It's the same! This is just like the stone we found at the Gigan Rocks!"

He takes the Ark of the Cosmos out.

"The Giga- what?" Amy asked in confusion.

"And now this makes two of them! I gotta get back and tell Jet!"

Storm runs away.

"H-Hey! Wait!"

Storm ignores Amy and continues running. Amy is angry at him.

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

Aquatic Captial. Sonic, Y/N, Tails, and Knuckles are riding down the road to Amy. Suddenly, Sonic sees something and stops.

"Amy!"

Amy is standing in front of the broken SCR-HD and then she turns to Sonic.

"It took you long enough!"

Amy starts beating Sonic. Tails and Y/N goes to the robot.

"What happened here?"

"Did you defeat it?"

"Don't ask me! First it comes flying at me full tilt, then it just blows up."

"It blew up?!" Sonic asked.

Tails gasped.

"Wait, does that mean...?!"

"What is it, Tails?" Y/N asked, looking at him.

"Sorry... I need to think it through a little more first." he said, clutching his head.

"Ok, but don't stress it out. Take it easy." she said, rubbing his back.

"Thanks, Y/N." he smiled, blushing with his tails wagging behind.

Knuckles walks closer to Amy.

"Hey, where's that meathead, Storm?"

"He grabbed something out of this robot and high-tailed it out of here."

A broken part on the robot's back is shown. The group waits for a moment.

"So does this mean the rampaging robots will all cool it?" Knuckles asked.

"I don't think it's that simple. If Eggman started all this by putting that stone in his mother computer, I don't think it'll stop until we remove it." Tails said.

"So where is that?"

The group starts thinking. Suddenly, Amy gasps.

"Wait, I remember Storm saying something weird about the thing he took from that robot matching something they found someplace else. Well.. Ohh, where was it he said? Gi... Giga... Something like that. Wait, Gigan..."

"The Gigan Rocks." Knuckles said.

"Right! What you said!"

"You know it, Knuckles?" Sonic asked.

"It's a pretty famous ruin among us treasure hunters. A legend about shooting stars tells of some star shard sealed there that can grant your wishes."

"Whoa... That sounds amazing..." Y/N said in awe.

"I know." Knuckles said, smirking that he's impressing her with legendary stories.

"Shooting stars! Sonic, Y/N, let's head to the Gigan Rocks right away! We might find a clue about these stones!" Tails said.

"Leave the directions to me! But they say the star shard is in a sacred chalice deep in the ruins, and getting there ain't easy. Nobody's made it back alive yet. We'll be risking our necks." Knuckles said.

"Yeah! Don't worry! That's nothing new." Sonic grinned.

"We can handle it!" Y/N grinned.

The group rides away. But what they didn't know is the broken SCR-HD starts coming back online.