Brand New Teenage Mutant Ninja Turtles: Book 1

Hey this is a crossover story of 'BNA: Brand New Animal' and 'Rise of the Teenage Mutant Ninja Turtles'. I do not own any of the characters from 'BNA' or the cartoon series 'ROTTMNT', only the characters that I've created inside my head. This is my first time writing a crossover like this, so I hope you all enjoy it.

Summary

It had been seven months after the turtles and their friends had defeated the Kraang and prevented the end of the world. For a while things seemed to be perfect and the family could finally have time to breathe. Unfortunately, their time for relaxation is turned upside-down when the brothers come across a strange girl, who had wandered into their sewer home. A girl that they thought was actually a mutant, but is actually a new species that they have never heard of or encountered before. What they didn't know was that their encounter with this girl will have them wind up going on an adventure of a life time. Protecting their new friend from people who wish to kill or kidnap her, to discovering a new race of beings that are hated by all of humanity. Follow them as they slowly learn more about these new beings called . . . beastmen.

Prologue

Alarms blared throughout a hidden facility as red lights lit the dark hallways. Sixty people ran through the building in a panic and many of them were scientists. Some were frantically running towards the multiple exits of the building, while many others were trying to gather up what they can of their research notes. One of the lead scientists stopped one of their workers in the hallway with a serious expression appearing on his face.

"Make sure that you and the others grab whatever you can," The lead scientist ordered. "We cannot lose any of our research on our project, do you understand?"

"Yes sir," said the worker before he dashed down the hallways.

The lead scientist was then approached by another worker, who had a panicked expression upon his face.

"Sir, we have a problem!" The worker said in a frantic voice. "We went to the lab where we were holding the subjects for our experiments in, and found that Subject 239 has escaped!"

"What!?"

But before the lead scientist could say anything else a loud snarl, that sounded like it came from a giant dog, was suddenly heard from down the hallway. He and the worker quickly turned to glance down the hallway in fear. The lead scientist then let out a growl before turning to the worker again.

"Forget about Subject 239 for now!" exclaimed the lead scientist in frustration. "We need to get out of this building now, before those monsters come and tear us all a part!"

With that said, the lead scientist and worker quickly ran down the opposite hallway as they headed towards the roof of the facility. Yet unknown to the two men a figure had been watching them from inside one of the vents. They were staring through the grill of the vent as the two scientists ran, before they flinched slightly in fear when they heard the growl. They slowly shifted away from the grill before they continued to crawl through the vent. The person got about a few feet before flinching once again when they heard the anguish cry of a scientist being torn apart. The person froze at the horrifying sound for a moment, but quickly got their wits together and continued onwards. It took about an hour for the person to reach their destination as they came to a grill that lead to the outside of the facility. The person paused for a minute as they gazed out to see that the grill led out into an alleyway. They stared out at the world before them before flinching when a flash of light flared up outside. The person hesitated in fear. For a split second they were having second thoughts about going outside. But then a look of determination appeared on their face before they finally made up their mind. The person carefully maneuvered themselves around within the vent, before they had their feet facing the grill. Once their feet were in position the person began to kick it. It took a couple of tries before the grill finally popped off. The person then twisted themselves around again before poking their head out from the vent.

As they did, we see that the person was wearing an old and ragged grey hooded cloak, which covered and hid their face in shadow. Underneath the cloak, the person wore a gray mid-sleeved nightgown.

They looked around to see that they were in a large alleyway. One that was large enough to fit a car or a truck in it. The person then looked down to see that the street was twenty feet below them. They frowned slightly before glancing back up in front of them. When they did, the person saw a fire escape balcony in front of them. Relief coursed through the person before they ducked back into the vent again. They turned around once more and began to crawl out backwards. It was a slow process but the person was able to get out. They planted their feet against the wall of the building, while gripping tightly to the outside edge of the vent. The person stared at one of the platforms for a moment before tensing their legs against the wall. Then they quickly let go of the edge of the vent and made a leap of faith. The person was able to grab onto the railing before quickly climbing up and over it onto the platform. The person let out a sigh as they stood on the platform to catch their breath. Once they did; the person began to climb up the stairs of the fire escape. They climbed climbed for about a minute or two until they finally reached the top of the building. The person climbed up the ladder as they scrambled up onto the roof. But when they did, they stopped dead in their tracks. Through the shadows of the person's hood, we see their sky blue eyes widened in horror at what they were seeing in front of them.

The sky was bathed in a bright red that looked like the color of blood as monstrous machines tore a part the large city. Their gaze then turned towards Metro Tower, one of the tallest buildings in the city, where a giant sphere hovered at the very top of it. Multiple fires burned everywhere as the sound of people screaming echoed throughout the air.

The person raised a hand up to their mouth as they silently gasped at the sight before them. They then fell onto their knees as their eyes welled up with tears before they spoke in a female voice.

"This . . . this is horrible. How on earth did this happening?"

The person continued to stare at the burning city, unable to tear her eyes away from the scene before her. But she was brought out of her shock when she heard growling behind her. The person quickly turned around and saw six strange, four legged creatures coming towards her.

The creatures were the sized of a tiger and their skin was a dark pink. They had three toe clawed feet, spines that ran along their backs, a jagged beak like mouths, and glowing red eyes that were shaped in a zig-zagged pattern.

The person quickly stood up from their sitting position as she stared at the creatures before her. For a moment, fear gripped at the person's heart, but she quickly got her wits together before she turned and jumped off the edge of the building. The monstrous hounds quickly ran towards the edge of the building. They were about to jump off the building to pursue the person, but paused in their steps when a fast moving blur suddenly shot up into the air. The camera moves upwards to reveal the blur to be the person that had jumped off the building. Yet the most surprising thing about the person is that their arms had turned into wings with silver white colored feathers. Wings which resemble that of a snowy owl's. The monster hounds growled and snapped angrily as they glared up at their escaping prey. The person panted as she stared down at the hounds for a second before she turned, and flew away from the roof that she had been on a few moments ago.

The person flew above the city as she gazed down at the destruction below her. She saw many human soldiers fighting against machines that seemed to be possessed by strange pink vines. Along with the monstrous hounds and other creatures that the person could not really identify. The scene below the person looked even worse than what she had seen on the roof. She continued to fly for a bit more before yelping in surprise when a helicopter monster suddenly appeared in front of her. The sudden appearance of the monster caused the person to quickly veer left. As she did her wing hit the side of a large building. Luckily it wasn't a hard hit but it was enough to cause a bit of damage. The person let out a yelp of pain before they clumsily began to fly down towards the street. Her landing was less than graceful as she rolled across the street before coming to a stop. As she did, the person's wings shifted back to being normal arms. The person groaned as she slowly picked herself up from the ground. For a moment she was a little disoriented by the crash. It didn't last long though as she quickly got her wits together before spotting a pack of monster hounds heading towards her. The person jumped to her feet, turned and ran down the street in hopes of escaping the hounds. She ran as fast as her legs could carry her. She didn't dare look back as she ran down the street with the monster hounds snapping at her heels. In her panic the person turned into an alleyway. Unfortunately the alley that she had turned into was a dead end. The person stopped in her tracks before turning to face the monster hounds again. The monster hounds growled as they slowly stocked towards their trapped prey. The person slowly backed away from the hounds before her back hit the wall behind her. She froze in fear as the monster hounds closed in on her. As they did something inside the person suddenly snapped. A primal instinct that quickly grew inside of her. One that made her drive to live grow stronger.

One of the monster hounds then leapt forward with the intent to kill the person. But as it did, sky blue sparks suddenly appeared around the person's body. The scene changes to the outside of the alley's entrance as a bright light flashed out from it. From the flash of light the monster hounds were flung out of the alleyway, and crashed into one of the building across the street. The hounds all slowly picked themselves up from the ground before turning their gazes towards the alley. When they did, the monster hounds flinched back in surprise and fear. The screen shows us the concrete of the street for a moment before a large, canine paw with black claws slammed down upon its surface. The paw was accompanied by sky blue electrical sparks that zapped and crackled around it. The monster hounds let out whimpers and snarls as a large shadow fell over them. The scene that shifts to show us a large four legged canine.

The canine had silver white fur that completely covered its whole body except for a sky blue star mark on its forehead. The tipped of the large canine's ears also had that same sky blue. The canine had a thick ruff with silver and sky blue highlights in its strands; a long bushy tail that seemed to ripple and cascade like a waterfall; and an ethereal sky blue light that surrounded the canine's body. The canine stood about the size of a delivery truck, towering over the monster hounds that stood before it. A low growl rumbled deep within the canine's throat. A sound that resembled that of rumbling thunder as it glared down at the monster hounds with its glowing sky blue eyes.

The monster hounds let out a few growls and barks as they tried to intimidate the giant canine in front of them. But that only seemed to annoy the beast as it glared down at them. Then, ever so slowly, the canine opened its large jaws. As it did a white flame began to slowly form within its maw. The scene changes to show us the top of the buildings before a bright flash of white flared up from the streets. It was accompanied by a loud boom that could be heard from miles away. The scene switches back to show us the giant canine again. It stood completely still as white fire burned in front of it. The very same spot where the monster hounds had once stood. The canine continued to glare at the flames for a moment before its ears caught the sound of helicopter blades. It turned its eyes upwards to see one of the monster possessed machines flying towards it. The canine glared up at the helicopter monster as it aimed one of its missiles towards them before firing. The missile flew straight and true as it landed a direct hit on its target. A large explosion occurred as smoke filled the spot where the missile had hit the canine. The helicopter monster hovered as it waited for the smoke to clear, to see if its missile had killed the canine. Unfortunately it never got the chance to see. A bright flash appeared within the smoke before a streak of sky blue light zipped out of it. The streak flew passed the helicopter beast before it landed one of the rooves of an abandoned apartment building. The blue streak revealed itself to be none other than the canine. Standing proud and strong without a single scratch on their body.

The helicopter monster turned to glare at the canine for a moment, but then its green eyes widened in stunned shock. A second later the helicopter monster exploded. The canine watched this with an indifferent expression upon its face. It then lifted its head and let out a loud wolf howl that carried itself all across the city. The howl attracted the attention of other machine monsters as they all turned, and headed in the direction it was coming from. The canine watched as the machine monsters; helicopter, tanks and trains advanced towards its location. Once they were close enough, bright sky blue light began to engulf the canine's body. The light became so intense that canine's body completely vanished inside it. Then, without any warning, the light flared outwards and engulfed almost the whole area of the city. The monster machines that were engulfed by this bright light quickly disintegrated upon contact. Many others try to flee but were too slow and winded up meeting the same fate as their brethren. Once all of the machines had been destroyed the light slowly faded. The canine gazed out across the city for a moment before it jumped down from the roof. It landed near same alleyway entrance that it came out of moments ago. It slowly walked into the alley with a slight limp within its step. It completely disappeared within the shadows before another flash of light burst from the shadows. It was only for a brief moment before the light disappeared within the darkness.

In the alleyway the sound of panting could be heard. Then a shadow appeared on one of the walls of buildings that made up the alley. The shadow had the appearance of a human, but if one were to look closely they would see that something was off with the shadow. From the shadow's outline features we see two canine ears sitting on top of the figure's head, and from the backside of the figure was a long canine tail. The scene switches to the ground where we see the tattered remains of a night gown and an intact cloak. The female figure panted as she collapsed onto the ground. She then reach forward and grabbed the cloak. As she did we see the person's hand. Her hand was humanoid in appearance, but it was covered in silver white colored fur with sharp claws at the end of her fingers. The figure picked the cloak up from the ground and threw it over herself. Once the cloak was covering her body, the person stood up from the ground. She stumbled slightly before steading herself. The person panted for a moment before she glanced towards the alleyway's entrance. She then started to make her way towards it when the person felt her foot land on something metallic. The person blinked before looking down. She saw that her foot hand landed on top of a manhole cover. The person stared down at it for a sec before quickly making a decision. She knelt down and lifted up the manhole cover with ease. The person then lowered herself into the hole while gripping the ladder firmly in the process. Once she had a good grip on the ladder, the person quickly grabbed the manhole cover and slid it back over the hole. Once it was covering the hole again, the person began to quickly descend down the ladder. She let out a groan when the disgusting smell of the sewer hit her nose.

"Well . . . better to be down here than on the surface." The person said in a low voice.

It didn't take long to reach the bottom of the ladder. The person's feet landed on the dry concrete ground before she began to look around. After a moment of contemplation; the person picked a direction to go and began to run down the concrete path. As she did the person's shadow passed over a couple of faded graffiti pictures upon the brick wall. The faded pictures instantly changed into bright letters. We then see the title of the story appearing on the wall of the sewer. Blue, red, purple and orange electricity sparked around the letters before they were engulfed by a bright flash of cyan, sky blue, pink and white light. The screen was filled with bright light for a sec before fading into black.

To be continued

And here's the start to my BNA/ROTTMT crossover story. I hope you all enjoy it and leave a comment to tell me what you think of it.