Here it is! Part 6 of my crossover saga! This time, it's Sonic The Hedgehog and Teenage Mutant Ninja Turtles(The Nickelodeon version)! This one is a bit more tied in to one of my previous stories but I still tried to make sure you don't really need to read it or any other story of mine to understand this one.

In terms of timelines, for Sonic I have decided that this saga takes place between "Sonic Generations" and "Sonic Lost World" so events from the latter will not be mentiond. For the turtles, they met Casey Jones and that's about the most accurate I'm going to be about the second season as it's still on-going.

That's all I have to say. I own nothing and I hope you will enjoy this story as much as I had fun writing it! Please review if you have something to say, either good or bad.

Black. Black is all that was. Nothingness and emptiness were the only words to describe the environment. The only thing that wasn't really black was an old man wearing a red jacket with white strips and yellow squares, white gloves, he had goggles on his head, his pants were black and so were his shoes. Under his giant pink nose was a long brown mustache.

"Annoying hedgehog". The man mumbled to himself. "First his younger self. Then this limbless freak, then a raccoon and now a princess! How does he do that"?! The man seemed to be frustrated beyond belief.

"You seem familiar with this hedgehog. Don't you, Doctor"? A robotic voice with somewhat feminize features to it asked him out of nowhere.

The doctor looked around every way, trying to locate the thing the voice belonged to. "Who is it? Where am I? What do you want"? He asked.

"Who and what is not important, Eggman". The voice said which caused more panic to the man. How this thing did know his name?

"I know where your little hedgehog nemesis is heading to next, and he is going to cross-paths with some troublesome enemies of mine". The voice explained. "I am going to send you to my servants on earth who fight those mutated freaks. You are trained with robots; you should be fine with them".

"What? Who are you?!" Eggman asked. "What are you talking abouuuuuuuuuuuuuu…" He couldn't finish before he felt himself teleporting away.

Eggman fell on his back hard. When he opened his eyes he noticed he was in some sort of laboratory. The place seemed like its being rebuilt at the moment and it was mostly white and it had a huge circle portal in the middle of it. There were also 3 large guns circling the portal.

The doctor got up from the floor to a sitting position and looked around. He then noticed 2 identical men with black hair and a blank expression on their faces. They also wore suits that resembled a tuxedo.

"Where am I"? Eggman asked the 2 men.

"The one who is fat who appeared in Kraang's base of operations is inside Kraang's base of operations". One of them said.

Eggman would have yelled at the man for calling him fat, but his grammar proved to the doctor that he wasn't an English master.

"Umm… Who is this Kraang exactly"? He asked. "Is it the voice that talked me and sent me here"?

The 2 looked at each other before grabbing Eggman and carrying him to a nearby room.

"Hey! Let me go! Where are you taking me"?! He tried to struggle them but to no success. They eventually threw him inside another room.

"Kraang's special guest will wait in Kraang's waiting room before talking to the Kraang's partner who is known as "The Shredder"." They said before slamming the door.

Eggman scratched his head in frustration. "First Sonic beats me again, then this old lady comes out of nowhere and… sends me here and now I'm a prisoner to those foreign people". He signed.

"Sounds like another day at the job, Boss". Eggman then heard a familiar voice coming from behind him. He turned around to see 2 small, floating robots. One of them had a round shape to his head and body. He was mostly black with a red head and hands. Near him was a robot at about the same size but he was shaped like a square and instead of red, he supported a yellow color.

Eggman's face went wide in surprise at the sight. "Orbot? Cubot? What are you doing here"? He asked his former robotic side-kicks.

"Well…" Cubot started. "After you left us to study that purple thing we found at space, we came across a group of those robot aliens who were coming back to earth".

"We thought we will eventually catch up with you once Sonic will stop whatever you were planning with that thing so we tagged along on their invasion". Eggman growled a bit at Orbot's continuing criticisms about his loses.

"Eventually, when they found us they trapped us here and we haven't heard from them until today, when they said their ultimate boss, I think, will send them you to help out with some creatures". Orbot finished his explanation.

"So… are we on earth now"? Eggman asked to which both nodded.

"Where were you, Boss"? Cubot asked.

Eggman told them all about his universe travels, the stuff and creatures he teamed up with and how Sonic with the help of others defeated him again.

After the doctor and his robots were done catching up, one of the men from before came in.

"The one known as "The Shredder" will now speak to the one known as "Eggman". He said before presenting a floating monitor. On the screen appeared a thin man who wore a durable armor with spikes appearing on his shoulders, arms and legs. He also had a silver helmet which also had spikes on it and he also wore a cape. Beneath the mask, his face seemed somewhat burned.

Near him stood a girl, who looked to be about 16 years old. She had dark brown hair which was dyed blonde at the back of it. She wore black clothes and a silver armor above it.

"Greetings, Doctor Ivo Robotnik". The man greeted.

Eggman flinched for a second. "How do you know my name"? He asked.

"I have ways". He replied. "I have heard about your efforts dealing with this hedgehog hero the world is referring to as Sonic. I found your success in blowing up the plant really impressive". He complemented the doctor who seemed to relax as the conversation go on.

"I myself have a problem with some animal teens that not only foil my plans, but their master also took someone I love. I would like to make you an offer. Help The Kraang build stronger robots to help us take them out and then we will help you with your little problem".

Eggman didn't like the idea of working with complete strangers who seemed to know a lot about him without even meeting them, but the offer sounded decent enough and every help he can have taking down Sonic will be appreciated. "Done".

"Very well". The man commented. "I am the Shredder". He said before showing to the girl near him. "And this is my daughter, Karai. We will wait for your word on when the robots will be ready." The screen went black as soon as he finished speaking.

Orbot and Cubot turned to Eggman. "So what now, Boss"? The round one asked.

"We build robots. I have no idea what I have gotten myself into, but if they offer me help with taking out that blue pest I'm in". He declared.

Meanwhile, the world's famous blue spiky hero with the red sneakers and white gloves, Sonic The Hedgehog, was preparing for a much needed vacation. After traveling to 2 universes and meeting new creatures and friends (One of them, he was still trying to find) he decided to head out to New-York city with his 2 best friends; The orange fox with the 2 tails known as Miles "Tails" Prower and the red echidna guardian of the famous Master Emerald, Knuckles The Echidna.

"Okay, guys. The Tornado is ready and the chaos emeralds are inside my suitcase so we are good to go"! Tails announced happily.

"Awesome, Buddy"! Sonic thumbed him up before turning to Knuckles. "Are you sure the Master Emerald will be safe with The Chaotix"?

"I trust those guys. They will be fine". Knuckles replied.

"If you say so, Knuckles". Sonic nodded at him before climbing on to the plane's wing while Tails got in the pilot's sit and Knuckles in the back sit".

"Let's go ahead and relax for a bit. We need a break from universe traveling". Sonic said as Tails started the plane.

The trio was on their way to the "Empire City", unaware that instead of a vacation waited another adventure.

So that was part 1! Let me know what you thought in the reviews!

We got a bit of an introduction to the main villian of this entire saga. Who is it? I'm not telling!

Hope you enjoyed and please review!