A/N: Okay guys, forget I mentioned 'Robothedgehog II: Princess Star on the last chapter, I've decided that the these series would be a different timeline compared to the Robothedgehog series, if you know what I mean. Enjoy! Oh, and I do not own Sonic the Hedgehog or anything related.

SONIC THE HEDGEHOG Z

The return of Caliburn and Merlina

In Tails' workshop, the now 11-years-old, two-tailed fox, now wearing a pilot helmet over his head and a lethal vest, was working on his X Tornado plane, while the now 18-year-old Sonic, with grey sunglasses with green lances over his head and the crystal ring over his right wrist, was taking a nap by the tool locker.

"Just one more bug to iron out and…there! It's done." Tails said as he finished working.

"Cool!" Sonic replied as he woke up. "Let's go out for a flight!"

DING! DONG!

"Someones at the door! Who could it be?" Tails said walking up to the door. "Good day and how may I-" Tails' cheerful look suddenly turns into terror when he sees a bunch of demonic knights at his door.

"Uh, excuse me, I'll be right back." Tails smiled nervously as he closed the door.

A sweat drop rolls down the side of his head

"Um, Sonic?" Tails called.

"Yeah?" Sonic came over.

Tails opened the door, showing Sonic the uninvited guests. "What the?!?! Underworld knights!?!?!" he said in shock and terror.

Suddenly, Sonic quickly grabbed Tails and dashed back to the workshop as the knights all burst their way into the house.

"You know about those guys?" Tails asked curiously.

"I'll explain later, we have to get rid of them first!" Sonic said as they arrived in the workshop. "Quickly, get in the X-Tornado!"

"Right!" Tails said and did just that.

Soon after, the knights found burst their way into the workshop and attack Sonic and Tails.

"EP! X-Tornado, transformation!" Tails transformed the X-Tornado into the X-Cyclone.

The knights attack them by swinging swords, axes and spears, and shooting their crossbows.

Sonic attacks them with homing attacks and breakdance, fighting combo melee attacks, while Tails fires machine guns from his X-Cyclone at them.

"Tails! Open the hanger door and drive them outside!" Sonic ordered.

"Okay!" Tails said and pushed a button on the remote, opening the hangar door.

Sonic and Tails head outside, but just as they did, there were more knights outside. The duo tries to outrun them all with everything they got, but there were just too many. They were quickly surrounded.

"Aw man, I wished Caliburn was here right now." Sonic frowned.

"Did someone call my name?" a familiar voice spoke.

"Who said that?" Sonic and Tails asked looking around when they saw a girl in a purple robe and a sword next to her on the roof of his house. "Who are you?" Tails asked.

"Caliburn! Merlina!" Sonic greeted with joy. "Boy, am I glad to see you two again!"

"Uhh…" Tails was confused about what was going on. "Sonic?"

"I'll tell you later Tails." Sonic said.

"Sonic! Catch!" Merlina tossed Caliburn and an armour glove to Sonic.

Sonic quickly caught both of them, wears the armour glove over his and holds Caliburn with it. "Ready for this?" Caliburn asked.

"You bet! Let's do this!" Sonic said.

The knights attack Sonic with their weapons. Sonic concentrates his soul energy into Caliburn and…

SLAAAAAAAAAAAAAAAAAASH

Sonic swung Caliburn, creating a massive slash wave, whish sliced most of the knights as they turned into black smoke. Sonic repeats this until he defeated all of them.

"Well, that's that." Sonic said in victory.

"You can say that again." Caliburn agreed.

"Hey! What's going on here? Who are these two Sonic?" Tails insisted.

"Oh yeah, time for some introductions and explainations." Sonic said.

"Say, aren't you the local blacksmith?" Merlina asked Tails.

"Blacksmith?" Tails asked confused. "No, I'm Tails."

"Oh, my apologies, I mean, you look just like him." Merlina said.

"Tails, that is Merlina the Royal Wizard of Camelot and granddaughter of Merlin." Sonic introduced her to Tails.

"Granddaughter?" Tails asked confused as he came out from the X-Cyclone.

"And I am the sacred sword, Caliburn!" Caliburn introduced himself. "My, you look just like the local blacksmith from back in Camelot, you wouldn't happen to be related to him would you?"

"No, I'm not a blacksmith and nor do I know one, or am related to any at that matter." Tails said.

"He's right, this Tails, he's my best friend and sidekick, and also an excellent mechanic." Sonic introduce him.

"My lord!" Caliburn said. "Say, where are we exactly?"

"Tails' workshop, in the suburbs of Emerald Hill Town." Sonic said.

"And what time of the year are we?" Merlina asked.

"Um, 9 of August, 2009 A. C." Tails said.

"Then that means, we must have travelled out from the story book and ended up in Sonic's world!" Merlina said.

"Uh, yeah, looks like it." Sonic said.

"But, what is going on? And how do you know these two?" Tails asked Sonic.

"Tails, remember when I told Amy about my adventures in King Arthour's storybook world and she didn't believe in me?" Sonic asked.

"Yeah, why?" Tails asked. "Wait! You mean?!"

"That's right! I wasn't lying at all!" Sonic said.

"But, how did you two end up here?" Tails asked Merlina and Caliburn.

"We have no clue I'm afraid." Merlina said.

"One minute we were in the castle, the next we ended up in the forest." Caliburn said. "That's when we saw the underworld knights attacking your home."

"Something fishy is going on here." Sonic said. "You don't suppose the Black Knight, the fake King Arthur has suddenly come back from the dead do you?"

"Umm…" Merlina and Caliburn tried to think of the case.

"I mean, he disappeared in a puff of smoke after we defeated him." Sonic said.

"Oh yes, I remember you tell me about that." Tails said.

"There is always the possibility that the King Arthur that my grandfather created might have had a soul that would live on in the underworld." Merlina explained. "He must have somehow managed to escape from it and ended up in this world."

"And in turn, that also must have resulted in people from back in Camelot being pulled into this world too!" Caliburn added.

"Yeah, including you guys too." Sonic said. "If the faux King Arthur is really back, then we might be in trouble if he learns about the Chaos Emeralds."

"Chaos Emeralds?" Merlina and Caliburn asked.

"They are seven mystical precious stones, capable of turning people's thoughts into power and manipulate the fabric of time and space itself." Tails explained. "Once you have all seven of them, they can be used to either create a miracle or total destruction."

"By the gods!" Caliburn exclaimed. "Then we certainly are going to be in trouble if he does so!"

"Yeah, you better believe it!" Sonic said. "Say, if you guys were dragged here, then many the Knights of the Round Table were too!"

"Wait! I just remembered!" Tails said and everyone looks at him. "Sonic, if you really had visited King Arthur and the Knights of the Round Table's world, doesn't that mean you…"

"Yes Tails, it's true!" Sonic said, interrupting Tails' question. He didn't wanted anyone treating him like the real King Arthur, since he doesn't like being the leader of a huge kingdom and whatnot.

"Wow…" Tails said. "Well, then I guess we should move on then, before more of those weird creatures show up."

"I shall assist you too, I'm curious about Sonic's world." Merlina said.

"Alright then, let's go!" Sonic said holding Caliburn.

"Mister Sonic! MISTER SONIC!" They heard Cream yelling.

"Who was that?" Caliburn asked

"That was Cream, one of our friends." Sonic said.

Sonic, Tails, Caliburn and Merlina went up to see Cream and Cheese who were at the door with agitated looks on their faces.

"MISTER SONIC! AMY HAS…" Cream noticed the sword in Sonic's hand and purple haired. "Oh, uh, who are you?"

"I am the sacred sword Caliburn." Sonic's sword introduced itself.

"And I am Merlina the wizard." The purple haired girl introduced herself.

"Oh, nice to meet you, I'm Cream and this is my friend Cheese." The rabbit introduced hersef and the Chao.

"Chao chao!" Cheese greeted.

"So, what's going on?" Sonic asked.

Later on, Cream explained about the invasion on Station Square and how the strange black knight kidnapped Amy. Sonic was angered with Amy's kidnapping.

"That cheap bastard! He mistook Amy for Nimue!" Sonic growled.

"Nimue?" Cream asked.

"Perhaps it is out turn to explain ourselves." Caliburn said.

Sonic, Tails, Caliburn and Merlina explained to Cream about the sword and the wizard, Sonic's adventure in King Arthur's world and how they ended up in their world.

"Then it's really true!" Cream exclaimed. "Amy though it was all a made up excuse for forgetting their date."

"Chao chao!" Cheese agreed.

"Um, date?" Caliburn asked.

"Alright then, only one way to go!" Sonic said ignoring Caliburn's question. "Let's go find the Knights of the Round Table and the Chaos Emerlads!"

"Alright!" Everyone except Caliburn said.

"But you haven't answered my question yet Sonic." Caliburn said.

"Um, how about later?" Sonic said, blushing a little.

"Uh, okay I guess." Caliburn said, raising his eyebrow.

Everyone went inside the X-Tornado. Tails was piloting, of course, while Cream and Merlina were in the passenger seats and Sonic was sitting on the nose cone with Caliburn.

"Alright Tails, onward!" Sonic ordered, pointing Caliburn forward.

"Roger! Everyone hold tight, here we gooooooooo!" Tails announced.

Soon after, the X-Tornado took off into the skies, with Caliburn and Merlina screaming at the top of their lungs because of how fast they were going, while Sonic, Tails and Cream were enjoying the ride.

A/N: And so, another great adventure begins! Will Sonic find the Emeralds and the Knights before it's too late? Will Amy ever be rescued? And what about Eggman and his robots? Find out all about it in the next chapter of SONIC THE HEDGEHOG Z!!! R&R, please.