Disclaimer: If I owned Ben 10, I'd try and make the show occur more often and actually get my story straight throughout the series!

AN: I've recently seen stories done by Earth Beast and SaurusRock625 for a Ben 10 idea where Ben gets the Nemetrix while Gwen gets the Omnitrix and it gave me an idea of a story I'd like to do. It would go like this:

When the Omnitrix was being transported, the Nemetrix, which was made earlier by Dr. Psychobos and seized by the Plumbers before he could cause major damage with it, was also being transported for safe keeping. When Vilgax attacked, both devices were sent to Earth and found by Ben. Both watches attached to him, one for each wrist, and the result had an interesting effect. Thanks to the presence of the Omnitrix, the Nemetrix's harmful mental feedback is neutralized causing Ben to have complete control of himself when in his predator forms. This gives him twice as many options as he had previously and when one watch times out, he can simply activate the other one! And in the future, he can be like Omniverse's Ben 10,000 that can mix and match aliens!

Now I know most of you wanted me to get going on my current continuous stories and fear not for I haven't forgotten you. I merely wished to post this first chapter while the idea is still fresh in my head, and for now I will place further chapters of this story on hold until I make a bit more headway on my other stories. In fact, I plan on putting a poll up soon asking which story my readers wish for me to try and finish first. Anyway, please enjoy and as always, Read and Review!

Twice the Hero

Space above Earth's atmosphere:

A being known as Vilgax scowled as his ship pursued his quarry. He had the appearance of a man, but he stood at twice the height of the average human with green skin, red eyes, and a squid like face. All in all, he looked like something from H.P. Lovecraft's Cthulhu Mythos. Vilgax was a vicious conqueror who had been terrorizing the galaxy for countless years and was constantly trying to expand his influence. Right now, he was in pursuit something that would help increase his formidable empire's power even more. Right now, the ship his vessel was following was carrying a device known as the Omnitrix. This device was made by the galaxy's First Thinker, Azmuth, and was said to contain the DNA of all sentient species in the universe. Such a device could make any individual one of the most powerful beings to ever exist, and as such the galactic conqueror desired it for his own means.

What's more, Vilgax learned that the transport moving the Omnitrix to a safe location was also carrying a second device that was recently discovered. Said device was made by Dr. Psychobos, a Cerebrocrustacean who apparently has a superiority/inferiority complex with Azmuth's species the Galvan. He made this new device, called the Nemetrix, in an effort to spite Azmuth and the Galvan. Apparently, Psychobos had been able to get his hands on blueprints for the Omnitrix by unknown means and had hired bounty hunters to gather the DNA of some of the galaxies most dangerous predators in order to match the aliens of the Omnitrix. However, Psychobos was caught before he could do any damage with the device and, while the mad doctor himself escaped, the device fell into the hands of the Plumbers, the universe's law enforcement. The knock-off device was taken to Azmuth where he determined that the Nemetrix, while too dangerous for any sapient being to wear safely, still could be useful in bringing the universes species together and could also help to at least save the DNA of species that could go extinct one day. So it was decided that both the Omnitrix and Nemetrix would be taken to a safe location until such time where they could be used to their full potential.

While Vilgax was more interested in the Omnitrix, even he had to admit that the Nemetrix also provided him with opportunities. This brings us to the current chase going on as Vilgax, on a ship full of his loyal soldiers and robots, was chasing after the vessel that was carrying both devices. While it was clear his ship had the superior firepower, the escaping ship wasn't making it easy for them. Soon, Vilgax's ship was able to knock out the main thrusters of the Plumber craft, and a cruel smirk formed on Vilgax's lips.

"Prepare to board!" he called out to his troops. However, that was when a last ditch effort was made by the green ship as it's rear cannons opened one more volley. The blast struck true and was able to tear the control room of his ship apart, flinging Vilgax from his seat and severely damaging his body. One of the robots controlling the ship's main cannons returned fire in the confusion, blasting the transport nearly in two and halting it's activity forever. No one noticed though, that an escape pod had been jettisoned from the ship before the blast hit, making its way to the nearest planet; a small, blue world that barely made a blip in the grand scheme of things in the universe: Earth.

Earth

"Oh man, this is going to be the worst summer vacation ever! I'd probably have more fun at summer school!" a ten year old boy named Ben Tennyson groaned as he trudged his way through the woods. He was a fairly average looking boy with short brown hair, bright green eyes, a black and white tee-shirt, green pants, and black and white sneakers. He was going on a cross-country vacation with his Grandpa Max, and at first he was completely excited for the trip. Things turned downhill, however, as he learned that his cousin Gwen Tennyson was also going on the trip with them. The two had a fairly antagonistic relationship and were constantly butting heads. Also, there was the fact that, while Ben loved his Grandpa Max with all his heart, the man cooked things that were barely considered edible. All in all, this was shaping up to be a very miserable vacation for the young man.

Suddenly, Ben heard a strange whistling noise and, looking up, saw a flash of light streaking across the night sky. The boy gained an awed look and exclaimed, "Oh wow, a shooting star!"

Before Ben could marvel at the rare sight for too long, the supposed shooting star did something odd. It seemed to make a sharp turn while in the sky and started making its way…RIGHT TOWARDS HIM! With a surprised shout, Ben dived out of the way just as the falling object slammed into the ground with the force of a bomb blast. The young Tennyson, while shaken, was largely unhurt and quickly got to his feet.

"Whoa man, was that a satellite?" Ben wondered as he crept closer to the newly formed crater. Letting his childish curiosity get the better of him, Ben cautiously peered into the smoking hole in the ground. What he saw shocked him. If the object was a satellite, it was way different from any he'd ever heard of. The thing was ball shaped and made out of metal, the outer rim containing ridges like the shell of an animal. Suddenly, the UFO opened up, causing Ben to jump back with a yelp. Taking a few moments to watch the opening, Ben detected no signs of movement, yet the hole was now glowing a mix of red and green. Wondering if he'd stumbled upon some sort of alien Christmas ornament, Ben once again crept up to the crater.

His eyes widened at what he saw. Inside the now open ball were two glowing objects, one green and the other red. The objects appeared to be… "Are those watches?" Ben asked curiously as he got closer to the downed craft.

The green watch like object had the appearance of a very big wristwatch, primarily black and grey in color, with a grey dial in the middle which had a green hourglass shape. The red one, however, looked to be a mix of a wristwatch or a spiked collar that some dogs or punk rockers wear. The face was shaped like a hexagon and is colored red and silver. The symbol has the appearance like an open mouth with sharp teeth. Even with every fiber of his being screaming at him that it was a bad idea, Ben couldn't help but reach out with his hands to pick up the two objects. Suddenly, the two watches seemed to ripple before their bands opened up and sprang at the 10 year old as if they were alive! Ben tried to pull back but it was too late as both watches clamped onto his wrists, the green on his right and the red on his left.

"AAAH! Get off me! Get them off me! GRANDPA!" Ben yelled in a panic as he stumbled out of the crater while shaking his arms frantically in an attempt to get the strange devices off him. Noticing neither was budging, Ben started frantically pulling on both watches and even proceeded to pick up a stick and pry the dual watches off him to no effect. After several minutes of this, Ben leaned against a nearby tree in defeat, clearly tired out from his struggles. Finally, his eyes wondered to the two new decorations on his arms. Since the red one kind of creeped him out a little because of its vicious design, Ben focused his attention on the green watch. Idly he started pressing the bright green buttons that lay on either side of the faceplate, hoping maybe something would happen to tell him what in the heck the thing was.

Suddenly, the watch gave a digital sounding beep before the faceplate popped up like a large button. "Whoa!" Ben cried out startled before regaining his composure. Looking at the now protruding faceplate, Ben saw what appeared to be the shadowy outline of a creature displayed in the center. Fiddling around a bit, Ben discovered that the faceplate turned and with each twist the figure changed to something different. "Cool…" Ben said in wonder before he stopped at a humanoid looking outline that appeared to have flames coming out of its head. Curiosity overriding any sense of caution, Ben pushed on the button to see what would happen.

As the watch's face went down, a bright green light emitted from the watch that quickly hid Ben from view to the casual observer. Inside the light, a startling transformation took place. From the watch, a red, lava like substance seemed to spread out and cover Ben's form. The boy seemed to grow in size till he reached the height of an adult human male, and the red substance hardened to look like bright red brimstone. His feet had a slight oval-like design with only two toes and one back toe, while his hands remained human shaped yet both seemed to be made of concentrated fire. Finally, his head was vaguely skeletal in shape and made of the same red rock as his body while a small inferno acted like hair to the boy's new form.

Once the transformation was complete, the light faded and the changed Ben did the only thing he could think of in his current situation: "AAAAAAAAAAAGGGGGGHHHHHHHHH!" he screamed.

Time-Skip: Next Day, Tennyson Campsite

Ben yawned as he woke up in the bunk bed of his grandpa's camper; the Rustbucket. As he got up to get ready for the day, he thought back to yesterday's events. After freaking out about being on fire, Ben had learned that his new form was actually producing the flames and didn't burn him. Like any 10 year old boy, he soon saw how awesome the whole experience was and began experimenting with his new form. Soon though, he was reminded why adults always tell him never to play with fire as he accidently started a forest fire while messing around with his new fire abilities. The fire had drawn Gwen and Grandpa Max to where Ben was in an attempt to find him, and they were naturally shocked about the change the boy had undergone. Fortunately, with a few choice words Ben was able to convince his relatives that he was in fact Ben, and they were able to work together to put the fire out.

After a few minutes to explain everything that had happened, Ben suddenly turned back to normal as the watch's power seemed to have timed out. Max had determined that the creature he had turned into was an alien based on how the boy had discovered the device, and had gone back to the crash site to investigate. Ben meanwhile, ignoring his Grandpa's orders not to mess with the watch, began experimenting with it to see if he could figure out how it worked. Eventually, he was able to figure out how to get it to activate again, and was able to transform into what looked like an orange, bearlike dog that lacked eyes and could 'see' through the use of gills on his neck. Ignoring Gwen's warnings, Ben went out into the woods to discover his new forms capabilities. He was later attacked by what could only be described as killer robots from outer space and, using both the terrane and his new form, Ben was able to destroy one while Gwen arrived and destroyed the other with a shovel as Ben transformed back.

Thanks to this experience, Ben was able to figure out how the green watch worked as he simply needed to push a couple buttons, select a setting, and he'd be able to turn into any one of ten different alien dudes! After Grandpa Max came back, they heard on the Rustbucket's radio that a giant robot was attacking the nearby campsite. Realizing that it had to be related to the two robots who attacked him earlier, Ben concluded that the robots were after the watches and now people were in danger because of him. Believing he could use the watch's powers to become a real hero, Ben convinced Grandpa Max and Gwen to go and help the innocent civilians. Using the green watch for the third time that evening, Ben became an alien that had skin made of green diamonds that could be shaped into weapons and were impervious to damage. Through both luck and perseverance, Ben was able to take down the large robot and save the day before leaving back to camp with Gwen and Grandpa Max.

As Ben brushed his teeth, Ben idly noticed the red watch lying on his wrist. After arriving back at camp, Ben had been tempted to try out the second watch and see what it could do, but Max had said that it would probably be best to wait until morning to try it out since they were all fairly tired and they had no idea what the thing could do. Max reasoned that they should have nicely refreshed minds before messing around with something outside their understanding. Now that it was morning, Ben couldn't wait to try out the red watch! While he had been wary of trying it out yesterday, both due to it's somewhat more vicious design and because he had later been too eager to find out what his green watch could do, Ben was now thinking of all the possibilities the spiked watch had to offer. Would it also transform him into alien heroes? Maybe it could give him powers like the ability to fly or shoot lazers from his eyes! He couldn't wait to find out.

After a meal made of what could only be described as termite cereal (which both Gwen and Ben tried very hard to ignore and hope they'd get some real food soon), the Tennyson's went outside the Rustbucket and headed to a clearing so Ben could test the red watch. Once there, Ben headed to the center of the clearing while Gwen and Max stood near the trees as a precaution.

"Are you sure you want to do this Ben?" Grandpa Max, a fairly wide man nearing his 60's in a red floral pattern Hawaiian shirt asked in concern.

"Yeah Ben, I mean it's okay to chicken out now. Neither of us will think any less of you," Gwen taunted with a teasing smirk, obviously trying to get a rise out of him. Gwen was his elder cousin by one year and while the two had the same green eyes, you could barely tell they were related. Gwen's hair was shoulder length and a bright orange, held up in the front by a blue hair clip that matched her cat themed shirt. Finally, she wore white capris and white shoes. She also gave off a tomboyish vibe.

Ben rolled his eyes, ignoring his dweeb of a cousin and said to Grandpa Max, "Don't worry Grandpa, I've got this."

With that, Ben started to inspect the red spiked watch to see what it could do. Unlike the green one, it had no buttons to indicate any function. Twisting the faceplate a little, Ben was pleased to see it beeped before the screen lit up some, the mouth shaped guard opening further and showing the shadowy outline of a creature. Twisting the faceplate further, Ben was pleased to see that like the green watch, this one had 10 different icons as well. If that meant what he thought it meant, he now had twice the number of aliens he could turn into!

"Oh sweet! Looks like I hit the jackpot guys! This things got 10 aliens as well!" Ben called out excitedly to his family.

Grandpa Max seemed to sigh in relief while Gwen merely scoffed and folded her arms, clearly jealous of his awesomeness, Ben thought. "So are you going to turn into an alien or what, because I'd rather look at whatever you change into than your pizza face," Gwen goaded.

Ben smirked as he looked down at the icon, seeing that the image looked like the outline of a Saber-toothed Tiger. "Alright, you asked for it!" Ben declared as he slammed his hand down on the faceplate.

Gwen and Max both shielded their eyes as a red light engulfed Ben. When the light faded, the two looked to see what the youngest Tennyson now looked like. In Ben's place stood what looked like a huge feline with sharp claws, a tail with a sharp hook at the end of it, fangs like a saber tooth tiger, mane like a dire wolf, and a small horn on the top of its nose. It wore a red spiked collar that holds the watch's symbol directly at its center.

Stepping towards the currently still alien, Gwen quipped, "Ugh, jeeze Ben first you turn into that dog-thing and now you're a cat. What's next, are you going to turn into a goldfish?"

Meanwhile, Max's eyes widened in alarm as he noticed that the creature who was once Ben seemed to lack any form of recognition in his blazing red eyes. Instead there was the look that most predatory animals have when hunting, one of pure instinct…and hunger. "Gwen, get back!" he urgently stated as he tried to keep his voice as low as possible to avoid provoking Ben.

Turning back to her grandpa with questioning eyes, Gwen asked, "Huh? What's wrong Grandpa? It's just the doofus-"

Gwen was cut off as 'Ben' gave a lion-like roar, his fanged jaws dripping saliva as he started stalking towards the two humans. Gwen gave a startled jump and, turning back towards her transformed cousin, shouted out, "Ben! What the heck's wrong with you?! You almost gave me a heartattack!" Noticing the catlike monster was getting ever closer with no gleam of recognition in its eyes, Gwen said a little less certainly, "Ben…?"

Suddenly, the large cat lunged forward, claws and fangs bared for ripping and tearing! Gwen barely had time to scream when she was suddenly yanked to the side by her arm, the transformed Ben crashing into the tree behind her and tearing it to splinters. Gwen took in several rapid gasps while trying to calm her racing heart, barely comprehending her annoying cousin had just tried to maul her. There was no time, however, as the hand holding her started pulling her quickly through the woods. Recognizing the person pulling her as her grandfather, Gwen stammered out, "G-Grandpa? What's…why was Ben…?"

Max Tennyson, a rare look of worry and fear etched on his face stated, "I don't know for sure why or how, but it wasn't Ben in control of that thing Gwen. He attacked us without any hesitation. I can only assume that whatever that creature is, its instincts are overwhelming Ben and giving him one simple command."

"And what's that?" Gwen asked, fearing the answer.

A grim look appeared on Max's face as he said seriously, "To hunt."

Suddenly, another lion like roar sounded behind them, causing both Tennyson's eyes to widen as they picked up their sprint. Max turned to his granddaughter and asked, "Gwen, do you remember the way back to camp?" Hesitantly, Gwen nodded. "Good, here's what I want you to do: while I get Ben's attention, I want you to run back to the Rustbucket. Lock all the doors and windows and wait for me to come get you, alright?"

Gwen's eyes widened in alarm and she shouted, "What?! No, Grandpa, don't-!"

"This isn't up for debate Gwen!" Max barked back, silencing Gwen's protests. "It's my job to protect you kids, and I fully intend to do so! Now, get back to the Rustbucket and wait for me. With luck, the red watch will eventually time out like the green one did and return Ben back to normal in a little bit."

Tears starting to fall, Gwen solemnly nodded before the duo reached a smaller clearing in the path. Giving Gwen the signal, the two broke apart and as the girl ran down the path as the old man turned to face his transformed grandson. It was only a few seconds later when the catlike creature came bounding into the clearing with a snarl. Steeling his resolve, Max started clapping his hands and shouting, hoping to get the alien's attention. The thing set its red eyes on Max before it seemed to sniff the air for a second. Then, to Max's horror, the cat seemed to split into two identical copies, one heading towards him while the other started heading to the path that Gwen took.

"GWEN, LOOK OUT!" Max shouted before diving away from the advancing predator, praying that his granddaughter would be safe.

Meanwhile, Gwen was running for her life down the path. Hearing her grandpa shout, she was tempted to head back but then heard the sounds of twigs snapping and the panting of a heavy beast breathing. Knowing what it might mean, Gwen continued her run with her heart in her throat, hoping beyond hope she would reach camp before her cousin could catch up to her. After what felt like hours but was only a few minutes, Gwen spotted their campsite and a relieved smile managed to work its way onto her face. With one last burst of speed, the redhead ran into the camper and slammed the door behind her, collapsing against it and sobbing in both relief and fear. Suddenly, the door shook as the creature that was formerly Ben rammed against it, causing Gwen to let out a shriek.

Inside of Ben's Mind

'No Gwen, Grandpa!' Ben mentally screamed as he drifted within the dark confines of his mind. He didn't know what happened, when the red light came from the watch, he'd expect to find himself in a new alien form but in the same mind like it was with the green watch. Only half of that was true, however, as Ben found himself in a new alien body but his mind…it was like being in the passenger seat of a car. He could see and feel everything his body did, but he himself couldn't control anything he did. He could only watch in horror as he started stalking after his cousin and grandpa, like how a cat stalks a mouse. The entire time Ben struggled to get his body to do what he wanted, but nothing he did worked. What's more, the instincts he now felt seemed to be ripping his mind in two. Words like hunt, prey, KILL! kept repeating over and over like a mantra.

'Please, I don't want this! Somebody, anybody, HELP ME!' Ben mentally screamed as he watched one of his duplicates corner Grandpa Max against a tree with the older man holding a branch defensively while the other had Gwen trapped in the Rustbucket. Just as Ben felt like he was about to lose it completely, there was a green light that seemed to shine in the darkness of his mind's eye. Squinting a bit, Ben saw that in the center of the light was the hourglass figure that was in the center of the green watch.

A voice that sounded like a mechanized version of his own suddenly sounded out, "Foreign DNA detected. Analyzing…non-sapient DNA risks mental stability of Omnitrix wielder. Mental feedback filter: Engaged."

The green light started to grow brighter and brighter until Ben had to close his eyes. When he opened them once more, there were two things he noticed: one was that the instincts that had been all but disappeared, only a slight background noise in his mind. The other was that, instead of being in the back seat of his own body, he now was able to move at will. He noticed that he was staring up at Grandpa Max, who was standing with his back against a tree and a branch held defensively in his hands like a sword. Ben slowly backed up and held a paw to his head, shaking off the last bit of fog from his mind. Max, noticing the change in behavior, hesitantly lowered the stick so that it was no longer in a striking position but still close enough that he could bring it to bare in an instant.

"Ben…?" Max asked uncertainly.

Ben grimaced as he lowered his paw and stared at his grandfather, his eyes changed from a ferocious red to a glowing green. "G-Grandpa…" Ben stuttered out in a growling voice.

This seemed to help ease any doubts Max had as he lowered the stick completely, a relieved smile finding its way on his face. Walking over to the boy-turned-alien, the elderly man threw his arms over Ben's shaggy mane and gave him a tight hug. "You had me worried there, kiddo," he chuckled lightly before a concerned frown formed on his face, "We need to find out if Gwen is alright, are you sure you're completely in control?"

Ben nodded his feline head and said, "Don't worry Grandpa, she's alright. I can…somehow tell what that double of mine is doing and it stopped acting crazy the same time I did. Gwen's still in the Rusbucket while I…erm, my copy is moving back towards us."

Max seemed to accept that and, standing up said, "C'mon Ben, let's go see if we can get you back to normal and find out what happened here."

The man and the beast walked back towards were their camp was, meeting an exact copy of Ben's alien form along the way. Going on instinct, the two Bens walked toward each other and seemed to merge together becoming one being again. Just as they made their way back into the campsite, a low beeping noise seemed to come from the collar around Ben's neck and, in a flash of red light, Ben stood in his human form once more. At that, the door to the Rustbucket swung open and in a blur of speed, Gwen tackled both males in a bone-crushing hug.

With tears in the corner of her eyes, Gwen cried, "You two, don't ever scare me like that again! I was so worried!" Breaking off the hug, Gwen turned to glare at her cousin. "And what the heck was that anyway doofus?! You could have killed us!"

Ben flinched at the accusing tone before he felt Max's hand on his shoulder as the man said calmly, "Now, now Gwen, I doubt it was Ben's fault. Let's all go inside for some hot coco and talk about what just happened. Hopefully, we'll never have to deal with this again."

The two children nodded before following their grandpa inside. Ben lagged behind a little to stare at the two watches that now seemed to be permanently attached to his arms. There was still so much that he didn't know about either device, but one thing was for certain: he had a lot of work ahead of him if he was to truly become a hero.

Nemetrix Aliens:

Crabdozer, Buglizard, Slamworm, Mucilator, Terroranchula, Tyrannopede, Hypnotick, Omnivoracious, Vicetopus, Duplicat (Panuncian), Reaver (Anubian Baskurr/Zed), possibly more OC ones in the future

Omnitrix Aliens (so far):

Diamondhead, Wildmutt, Ghostfreak, Heatblast, XLR8, Grey Matter, Four Arms, Stinkfly, Ripjaws, Upgrade

AN2: Just a couple quick things that I thought I'd bring up. First of all, while I love all the Ben 10 series, I was rather disappointed in Omniverse. Whereas Alien Force and Ultimate Alien had a more mature theme (and more mature artwork) than the first season, Omniverse took all that and regressed it right back to how it was in season 1 if not worse! Think about it; in Omniverse there was no Ultimate aliens (except what Albedo, the bad guy, used), limited Kevin and Gwen interaction after all that time with their character development, an 'improved' Omnitrix that functions even worse than the prototype, and worse of all it made Ben into an immature brat again! So, while I enjoyed it, when I get to Omniverse please expect me to make it a bit more mature than what it was in canon.

Second of all, you may have noticed I skipped over quite a few scenes in this chapter. While I would have preferred to show all the scenes we all know and love, I wanted to focus more on the stuff that has changed due to Ben getting two watches as opposed to what stayed the same. So please expect to see scene skips in future chapters, unless someone wishes to beta this story and offers to write out the scenes I skip.

Also, while Ben might be more powerful now that he has two watches, he ISN'T INVINCIBLE! So please don't expect every fight he gets into to be a cakewalk. Ben wouldn't be the hero we all know and love if everything came easy to him, he'd just be like that snobbish Ben 23 from Omniverse. This Ben will have his own trials and difficulties, so don't go complaining when he doesn't just breeze through every enemy he faces.

On a final note, in the future I might be looking for OC predator aliens to add to the Nemetrix, so feel free to drop some ideas you may have.