All right, welcome to book 2 and here's where things are gonna get fun. Here's the rundown.

After a year, the Underground has returned to Canterlot High, and this time they've brought more of the team, looking for fun and adventure. But what they find is trouble. Evil beings from Equestria called the Sirens have taken over and Scourge and Fiona has allied himself with them. Can the team fight them back or will the multiverse be enslaved? Enjoy!

Ch. 1: Back to School

It had been a year since the Sonic Underground had wound up at Canterlot High and helped save the multiverse from Sunset Shimmer. Sonic and his siblings were hanging out in the jungles of Angel Island, with Knuckles' permission, of course. Sonic was working on his parkour skills, Sonia was looking through a fashion tabloid, and Silver was helping Manic get a handle on his geokinesis.

"All is peace. All is calm," he said, as the green hedgehog tried to lift a brick (Which I count as stone since it's made of clay). "Within the silence of yourself, Manic, reach out with your mind and raise up the brick." Manic tried to lift it, but it only got a few inches off the ground while under control, until it flew up and hit him in the head.

"Ow!" he said. Then Sonia pulled out a pad of paper and marked something.

"That's the 37th time." she said, keeping score.

"A little more control. Once again," said Silver, meditating while hovering with his powers and pointing to the brick.

"No way, Silver. I'm sick of this geokinesis stuff," he said. "Why do I have to learn to move rocks with my mind?"

"Lock-picking and your drums will only get you so far, Manic." said Silver.

"It got us a TV show," said Sonic.

"YOU CAN'T COUNT ON THAT!" shouted Silver. "NETWORKS ARE FICKLE! THEY CAN DROP YOU LIKE A MAN WITH BIG OAK FINGERS!"

"So what? Will they like me if I have the power to make things hit me in the face? Is this a good skill?" asked Manic.

"You have to learn to do it right," said Silver. "Now try it again, or you'll get nothing for supper but a piece of leather and a blatherskite."

"What the heck's a blatherskite?" asked Manic.

"IT'S A PIECE OF LEATHER! Now concentrate!" said Silver.

"But we're supposed to be down at the lab later today." said Manic, sitting back down.

"You've got plenty of time. Just relax," said Silver. "Now. All is peace. All is calm. Within the silence of yourself, reach out with your mind and raise that brick!"

Manic tried and got it far higher off the ground than before.

"Aaahh-AAH!" said Silver as Manic hit himself in the face again, this time splitting the brick in half and falling on his back. "Aw, dammit!"

Sonic Prime: "Freakazoid!" Reference! *hears crickets in the audience* What? No one's heard of "Freakazoid"? *still hears crickets* It was a WB TV show in 1995. *hears someone cough* Look it up. *walks away*

"Sheesh. It took thirty-eight times for the brick to break," said Sonic, picking up his brother. "Pretty sure that's a new record."

"Forget it. Let's get to the base and see what Tails wants from us this time," said Silver and he floated away. Soon, they arrived at the hangar to find Tails tweaking his arm cannon. Then Sonic was surprised to see Knuckles and Shadow were there as well.

"What're you guys doing here?" he asked.

"Well, you remember that dimensional portal I built last year?" asked Tails.

"Yeah." said Sonic.

"Well, I-" Tails began before he noticed Manic. "What happened to him?"

"He hit himself in the head with a brick thirty-eight times. Then the brick split in half," said Silver.

"Geokinesis training again?" asked Knuckles.

"He's improving, I'll give him that," said Silver, looking at the barely conscious hedgehog. "So who gets to wake him up today?"

"It's the Ultimate Lifeform's turn." said Sonic in a snarky tone.

"I hate you, Sonic," said Shadow. He walked over and sent a lightning bolt of Chaos Energy into Manic's shoulder, prompting the green hedgehog to quickly raise a fist and punch him in the face, knocking him to the ground.

"Ugh," Manic groaned stretching. "Thanks for the wake-up call, Shadz. So what's up?"

"Well, I modified the portal design to both A; run off the power of the Chaos Emeralds, and B; work as an alternate mode on my arm cannon." said Tails.

"So you mean we could get back to CHS?" asked Sonic.

"That's our first stop," said Tails. "Then I was thinking we pay Flash a visit."

"Heh. Good. I've been waiting for a rematch," said Sonic, stretching. "Let's do this."

"I take it you boys are coming too?" Sonia asked Shadow and Knuckles.

"Of course," said Shadow.

"You think I'd pass up something like this?" asked Knuckles.

"Don't you have a Master Emerald to protect?" asked Sonic.

"Nah. Chaos is the true Guardian, remember?" asked Knuckles.

"What are the odds of us turning into humans after we leave the portal?" asked Shadow.

"Well, given the fact that Sonic and his family transformed when they went through, and the elasticity of the Mobian morph-gene, I'd say 1 to 1." said Tails.

"So, definite." said Knuckles.

"Pretty much." said Tails.

"I'm coming too," said Silver. "I've done a lot of dimension-hopping, but I've never gotten a chance to go to this world."

"The more the merrier," said Sonic. Once Tails was done with his red arm cannon, he slid it onto his arm and put his finger on the trigger.

"All right. Everyone stand clear," he said and aimed it at the wall. He turned the dial and fired off a large green blast that turned into a wormhole on contact.

"All right. Let's do this. Canterlot High, here we come!" said Sonic. Everyone jumped in and when they came out, boy were the girls in for a surprise.

Speaking of whom…