Hey, guys!

Well, I recently saw Avengers: Age of Ultron. That was a pretty good movie, and I liked the references to Guardians of the Galaxy. I just hope that the next Marvel movie after Ant-Man is Deadpool.

Anyways, this arc should be interesting for you all. I won't spoil any details, but let's just say you won't be disappointed.

I don't own RWBY or Sonic. Enjoy!

Beacon Academy, Friday, 4:15 p.m.

The next few days were surprisingly peaceful for everyone at Beacon. Classes went by, Amy chased Sonic, Rouge recovered from her capture by Emerald and the White Fang, and Omega was back to full functionality. Overall, a sense of normalcy was reached.

Until a strange package came addressed to the Mobians.

"Hm… this is rather strange," said Ozpin. He and Sonic were looking over the package while Glynda faithfully stood close by. The package itself was a small box, and it had little weight to it.

"Yeah, no kidding," agreed Sonic. "There's not a return address, like most of the fan mail we've gotten."

"Indeed… It didn't trip any warnings in our screening procedures, so it isn't a bomb. Still, who knows what's inside it…"

Sonic looked over at Glynda and grinned. "Only one way to find out!" He took the package and ripped it open before she or Ozpin could stop him. They breathed a sigh of relief when the blue blur didn't blow up, and looked at the device in his hands.

It was a small disc, not unlike one used to play music in Remnant. "You guys were worried about a disc?" said Sonic, chuckling at their paranoia.

"You could say we're still worried. Look on the disc," said Ozpin. Sonic turned the disc. On it was the face of a bald man with goggles and a huge mustache.

"Eggman sent this?" The hedgehog gave Ozpin the disc. "Hey Professor, could you put it in?" He grinned. "Maybe it's a message of surrender."

"Or it's a virus. Ozpin, are you sure it's safe to do this?" asked Glynda, worried about the welfare of the headmaster.

Ozpin turned to her, a reassuring expression on his face. "I'm sure it really is just a message."

Sonic nodded. "Yeah, if it was a virus, he wouldn't have sent a disc over. Besides, he likes more flair in his cyberattacks. He'd be gloating in your face using your own computers."

Glynda wasn't entirely convinced but allowed the professor to insert the disc into the computer at his desk. The hologram lit up, revealing Eggman in all his obese glory.

"Greetings, Sonic! I'll bet you're cowering in fear about now, wondering what I'll do next!" Eggman cackled a bit, and Ozpin fast forwarded the message until he actually spoke again, which Sonic was VERY grateful for. "Ahem. Now, my evil plans aside, I've, um…" Eggman hesitated a bit. "This really hurts to admit this, but I need your help with something."

"Whaaaaaat?" Sonic was dumbfounded. "Why would Egghead need my help?" He recovered, then smirked. "Is it to trash his robots again?" Glynda shushed him as Eggman continued.

"I've come across something very powerful and very dangerous. I call a temporary truce so we can deal with this together." The evil doctor leaned into the camera. "Trust me, you'll want to see this. As a token of my good will, I'll allow you to bring anyone you choose- including that outdated bucket of bolts, Omega."

Ozpin looked at Sonic. "Doesn't Omega want to blast Eggman into oblivion whenever he sees him?"

Sonic nodded. "Yeah, he does. It really must be serious, then."

Eggman continued, "I'm attaching coordinates for me and your team to meet me at 8:00 tonight." He glared at the camera. "Don't think this is permanent. I'm still aiming to create the Eggman Empire here on Remnant. This truce will end when we're done."

Orbot's head popped in view. "You sure you want to continue fighting, Doctor?"

"Of course I do!" Eggman shifted to his robotic assistant. "I'm not doing this because I want to! If Sonic helps me get rid of him, that'll be one less obstacle in my path! Besides, he's probably going to benefit from this, too…."

"Hey, Doc? You left the camera rollin', partner," said Cubot from off-screen, still talking in his cowboy drawl.

"I did?" Eggman looked towards the camera. "So I did. Well, I have a few more closing words. Sonic, I know we don't trust each other, but I vow on my honor ("What honor?" questioned Sonic under his breath.) as man of science and evil that I will not harm you or anyone that passes through my gates." He held out his hands as he said it to show he wasn't crossing his fingers. "Meet me at the coordinates at 8:00 p.m. tonight, and we'll deal with this together." The message ended, and the coordinates showed up on the screen.

"Well, Sonic? Do you trust him?" asked Glynda.

Sonic scoffed. "I trust him about as far as I could throw him." His expression turned serious. "That being said, something's got him spooked. It sounds interesting enough to investigate." He got up from the chair.

"Be careful, Sonic. Doctor Eggman may need your help, but he did say that it was a threat to both you and him," warned Ozpin. "I trust you to keep the companions you bring alive." He gave the hedgehog the disc with the message.

Sonic took the disc, then went to find the others. On the way to the rooms, he ran into Amy.

"Oh, Sonic! I've been looking all over for you!" Amy gushed, excited to see him. She was about to glomp him in a hug, but Sonic held out a hand, stopping her.

"Hey, Ames. Could you get everyone, please? We've got important news," he said.

Amy smiled and saluted. "Anything for my Sonic!" She noticed his serious expression. "What's wrong?"

He looked at the pink hedgehog. "Let's just say Egghead needs our help with something."

Beacon workshop, 30 minutes later…

Everyone from Teams RWBY and JNPR, along with the rest of the Mobians, watched Eggman's message. "And you're sure we should trust him?" asked Blaze, who was sitting next to Silver and holding his hand.

"Danger inherent with trusting Eggman," droned Omega. He was fully repaired after his encounter with Emerald, and he really wanted to get out.

"Of course we shouldn't trust him," said Weiss. "He's trying to take over our world here."

Ren nodded. "Still, he seemed scared about something. It's certainly sounds like something worth investigating."

Shadow looked around at the gathering. "We'll need to bring our heavy hitters. If this thing has Eggman spooked, there's no reason we should mess around."

Sonic nodded. "Let's get someone from each of our teams, including myself. Ruby, how do you feel about letting us borrow your sister?"

The hood-wearing girl shrugged. "Go for it. If you want damage, she's all yours. I want to go next time, though." Sonic grinned and gave her a thumbs-up.

Yang jumped up from her seat and did some practice punches. "Hoo, yeah! I'm all fired up!" she said excitedly.

"My assistance may be required if any action is necessary against Eggman." Omega brought his machine guns out. "Especially if that action requires termination."

Sonic whispered to himself. "Omega, Yang, myself… Shadow, you up for a little trip?" The black hedgehog nodded.

"I wanna go!" shouted Nora. The other members of Team JNPR were understandably nervous about her declaration.

"You sure, Nora?" asked Jaune. She nodded excitedly.

Sonic grinned. "That's fine with me. Amy, you can come, too. I wouldn't want to break up the hammer team." Amy and Nora high-fived.

A hologram emitter shimmered, and Aeromi appeared. "I'd like to go too. Maybe while we're there, I could hack into Eggman's database. We need more intel on his operations."

"Artificial Intelligence unit Aeromi is welcome to come with me," Omega volunteered. "I can hide her inside my systems on a disc."

"Good idea. We still need to figure out where the last two Chaos Emeralds are, so searching with his radar will help immensely," said Tails. Rouge was slightly disappointed that she wasn't chosen for the role of hacker, but understood that Aeromi would be far more mobile once she got into the system.

Sonic grinned. "Remember, we'll need to act surprised. He still doesn't know that we know are aware of his base's location." Everyone snickered, remembering how the base was discovered. He got up from his seat and grabbed Cobalt Shard. "Alright, guys. Let's see what Eggman wants us so badly for."

As everyone went to their places, Tails walked up to Sonic. "I hope you know what you're doing, Sonic."

The hedgehog put an arm around the fox. "I have a feeling we'll need to cause a lot of destruction, and those guys know destruction. I want the rest of you prepared to come to our aid in case something goes wrong, though." His expression turned grim. "If something has Egghead running for OUR help, it's probably really bad."

The kitsune nodded, and as he went off, Sonic couldn't help but think, 'Who's this "Him" that Eggman was talking about?'

Egg ARK, same time

Eggman paced through his base, visibly nervous. "I may be able to keep him restrained now, but I have no illusions that even my superior skills can't keep him down for long…" He looked in a cell through the containment field, where a black figure was sitting quietly. "Don't get any funny ideas, you piece of scrap. When Sonic gets here, we'll deal with you soon enough." He left the figure alone, though there were plenty of security cameras watching his every move.

Metal Sonic chuckled as the doctor left. "Oh, I'm sure you will, my ignorant creator." He pulled out the white Chaos Emerald, looking into the gem. "However, it will be ME who deals with you..."

*Insert ominous music*

Well, how about that? Metal Sonic will be dealt with in this arc AND most likely a Chaos Emerald to be obtained. I've got big plans for the last Chaos Emerald. I've been planning the location of that bad boy for quite a while.

Points on who can find the Fairy Tail reference. :3

Anyways, thanks for reading, and I'll hopefully see you again soon! Make sure to favorite and follow if you liked it and want updates. Speaking of favorites, I just noticed that this story now has 93 favorites! Come on, guys, I know we can reach 100! *waits for the story to hit 100 favorites*