Chapter 1

A/N: This Chapter uses most of what happens in the Teen Titans origin episode "GO!" as a template. it is meant to start off the story, and not all the chapters will be as near to "episode copies" as this one is. I simply wanted to use the character's origins from the TT series to introduce the story, and yes, I will be using aliens from all the Ben 10 series. As per the usual warning, I do not own Ben 10 or Teen Titans. They belong to their respective owners.

Ben walked out of Mr. Smoothie at a leisurely pace, enjoying a chocolate-blueberry combo smoothie. Gwen was close behind him, followed by Kevin who, against his better judgement, had actually ordered one of Ben's suggestions.

"Ugh! I can't believe I let you talk me into getting this!" Kevin complained as he threw away a barely eaten peanut butter-jalepeño combination that despite the appeal of spicy peanut butter was as per Ben's usual smoothie tastes, a horrible combo that left an awful aftertaste in his mouth.

"Don't blame me! You're the one who took my advice. It can't be that bad, can it?" Ben took another long sip of his smoothie as he opened the passenger door of Kevin's muscle car and let Gwen get in. Kevin slid into the driver's seat next to his girlfriend and sighed.

"Guys, could we just have one peaceful car trip without you two bickering over something stupid?" Gwen asked with an exasperated sigh. Ben stopped everything he was doing. "Mr. Smoothie is NOT stupid! Don't even joke like that." At that point, the trio's plumber badges received an incoming signal. It was Grandpa Max, and he sounded worried. "Ben, Gwen, Kevin, where are you? Never mind, the situation is calling for experience, and after your fight with Vilgax, I know you three can handle it. I'm sending Kevin the city's coordinates."

As soon as Kevin got the coordinates, he let out a low whistle. "What is it? Where are we going?" Gwen asked, to which he replied "Jump City. Hang on, we've got a long drive ahead of us."

When the trio arrived at their destination, they were greeted with a horrifying sight. Lizard-like creatures with wings were destroying every building in a fifty mile radius. Ben jumped out of the car and, running against the crowd, yelled his trademark "It's hero time!" as he activated the omnitrix's dial and scrolled to the alien he wanted.

"Humongousaur!" Ben yelled as his form changed to that of a thirty foot tall orange dinosaur-like biped with a round black and green depiction of an hourglass on his chest. Several of the lizard-like creatures immediately directed their attacks at him, and Gwen was forced to put up a mana barrier to block the majority of them from reaching him. Kevin was having his fair share of trouble with the creatures until suddenly, as if out of nowhere a green panther jumped next to him, biting one of the aliens into submission.

"Ummm... Nice kitty?" Kevin said uncertainly as he and the panther were forced back to back. He absorbed the metal from a nearby street lamp and punched the nearest lizard's lights as he watched the panther make quick work of two other aliens. Then suddenly, the panther changed its shape into a green skinned teen with a purple and black jumpsuit, and he was wearing a mask. "Follow me, and bring your friends. We could use you, especially the big guy." He gestured toward Humongousaur, who was busy pulverizing the army of lizard aliens.

Gwen ran over to her boyfriend and asked "Who's your friend?" To which the green teen responded "Beast Boy, ex doom patrol, who's that?" And he pointed at Humongousaur again, who noticed him this time.

Ben finally stopped pounding the Lizard creatures long enough to say "The name's Ben, now how do we stop this invasion? And for that matter, who started it?"

Beast Boy looked up at the thirty foot tall Vaxasaurian and explained the situation so far, with several pauses in between to knock out more aliens. "Some alien girl that was their prisoner escaped, and they threatened to destroy the city if we interfered with her recapture. I got separated from my friends after I beat up a couple of these guys without really paying attention because of my… ummm, short attention span. Then I ran into you guys. Pretty lucky for me, huh?"

Before any of them could react to the cocky grin that Beast Boy gave them, a huge hologram extended across a tower on the island in the distance, and the alien that could only be assumed to be the leader of the strange flying lizards began to speak. "Fools, the Earth scum were warned. Your insolence will be punished. Your city shall be destroyed." Then the hologram disappeared and a huge ship turned toward the city and began charging a giant particle cannon. Then the four teens heard an argument coming from a block away.

"All the fault is yours! I commanded that you leave me alone, but you insisted upon the being nice!" They heard as they ran toward the voices. "My fault? You blast me, you kiss me, but you never stop to mention that they have a gigantic particle weapon!" After that several things were said in both English and a language that none of them recognized. They arrived on the scene just in time to see a girl in a purple hooded cape yell "Quiet!" Then while everyone's attention was on her she simply said "Hi."

Then Team 10 and Beast Boy were noticed. "There you are, Beast Boy! Soooo… who are they?" Cyborg asked him while gawking at the huge form of Humongousaur. Gwen decided to do the introductions "I'm Gwen, this is Kevin," she pointed at her half Osmosian boyfriend, who said "'Sup" and then she continued, "And this is Ben."

"Ben?" Repeated the girl who had been yelling in another language, "This name is most strange for a Vaxasaurian. And what is an Osmosian doing on this planet?" Now it was Team 10's turn to gawk. This girl knew what species Ben currently was and apparently also knew what an Osmosian was. After the initial shock was gone, Ben evaded the question and asked the group, "Do we have a plan of attack or are we going to let the city burn?" The alien girl never lost her distrustful and confused look.

Raven was first to speak up. "Well, if Ben here was smaller, I could transport us to the ship with my dark powers, but he's way too big to-" She was cut off by a green flash and a perfectly human Ben Tennyson taking the place of Humongousaur. "How 'bout now?" he asked as the confusion on everyone but Gwen and Kevin's faces increased. Raven only recovered enough to mutter "Well, that works." As they were all engulfed in her dark magic and transported into the ship.

"Ugh… that dark energy stuff gives me the… uh, I mean… It's cool!" Beast Boy said, giving Raven a thumbs up. "Niiiiice." Kevin responded sarcastically to the green skinned teen's quick recovery. "We have to get to the firing controls. There isn't much time." Robin said to the other seven as they began to sneak down a corridor. Then Gwen noticed Raven had stopped following them. "Mind telling me why you're always by yourself?" she asked the robed teen.

"You heard the kid… I don't exactly fit in." she said, seeming a little more downcast than usual. Gwen put a hand on her shoulder. "He's green, two of us are half alien, one of us is half metal, one of us has a plethora of aliens at his disposal and one of us is from space. You fit in just fine." Raven decided that now wasn't the time to question her new friend on what she meant about aliens and simply nodded, thinking she would ask later.

The orange skinned girl, who by this time had gotten used to her strange company, directed her attention to Robin "I bring you… apology." She stated, unsure of how he would react. "Don't worry about it. I'm sorry I yelled too." Robin said. The alien girl continued "And, again, you are all very… nice. On my world only my Knorf'ka has shown me such kindness."

"Well things are different here, but we shouldn't be stopping to chat, because if they didn't know we were here before, they do now." Ben interjected as he raised the omnitrix dial and thought ~skip the catch phrase, it would attract unwanted attention.~ as they were surrounded by the lizard aliens.

"Take them out, team." Robin said as, on a hunch, Raven raised a necromantic shield around her and Ben. "Thanks." He said as he slammed the dial down and out of habit, yelled "XLR8!" Raven then lowered the shield and XLR8 took off, knocking out the remaining seventeen or so aliens in 0.3 seconds. Changing back into Ben, he picked up one of the alien spears and said "I think I'll keep the element of surprise."

"Dude, are you always this resourceful?" Beast Boy asked dumbfounded. "eh... so, so." He responded. When they found the bridge of the ship, they saw that it needed a key card, and Robin was more than happy to bring out an explosive. Then Gwen got an idea. "Why don't we just have Ben use Greymatter to hack into the door mechanism, instead of blowing up the ship?"

"Who is this Grey Matter you speak of, and how did you manage to be a kineceleran?" The orange skinned alien girl asked him. She was very interested in what this human could do, but she was still cautious. Again, Team 10 was stunned that she recognized his form, and knew the term to match. Robin took the liberty to use Ben's stunned face as extra time to blow the door open.

"-it takes more than eight juvenile heroes to defy the mighty Lord Trogar." They heard the leader, apparently Trogar himself, say as they entered.

"We're not eight heroes, we're one team." Robin said confidently. "Since when did I say I was part of a team?" Kevin asked, annoyed that no one had asked his opinion. He charged into the room anyway, coated in the red metal that the ship's hull was made of. Beast Boy ran, or rather bounded over to a group of the aliens as a kangaroo, taking them out with his powerful legs, but was knocked against the wall after one of them landed a powerful punch. Raven used her dark powers to appear in front of Beast Boy's attacker and put up a small shield to repel his punches.

When her shield failed on her, Robin used the opportunity to jump onto her attackers back. A punch to the face and roundhouse kick later, the Lizard alien grabbed him around the torso and threw him across the room, where he was grabbed midair and set down by a hand, made of pure mana energy. "What the?" was all he could get out before he had to get back into the fray. The orange skinned alien shot strange green bolts of energy towards Trogar as he began to run towards her, only to be stopped by Cyborg and Kevin, who were both more than glad to punch him several times. Unfortunately, they were both knocked backwards by the force of his punches, and she was grabbed and forced onto the floor, struggling to get free.

"Hey ugly!" the entire bridge heard Ben shout, "Pick on someone your own strength!" and he hit the dial of the omnitrix. "Fourarms!" and he began pummeling Trogar mercilessly. Unfortunately, he was swarmed with the entirety of the bridge, minus Trogar, who was forced to recover for a short while.

"Cyborg, can you rewire that into some sort of weapon?" Robin asked as he, Gwen, Cyborg, and Kevin were cornered. "I can try." Cyborg responded, fiddling with his arm. Raven, who had been trying to help Beast Boy recover, suddenly felt the need to intervene, and yelled "Stay away from my friends! Azurath Metrium Zinthos!"

The entire bridge experienced an explosion of dark energy, which knocked it out of the sky and into the ocean. This had Trogar's full attention focused on Raven, whom he raised his claws to strike a killing blow. There was a sonic cannon shot as Cyborg shot directly into Trogar's back and he went down. Hard.

"Alright, I'm only gonna say this once. Booyah!" Cyborg said as he lowered his newly wired sonic cannon. Kevin gave Beast Boy a high five, nearly knocking him over as he forgot he was still covered in metal.

The next day, four of the heroes, along with Team 10 were still standing on the island in the bay, gazing over the city "That's quite a view" Raven commented. "Somebody aught'a build a house out here." Cyborg replied. "Yeah, if you like sunshine… and the beach." Beast Boy added as he elbowed Raven. She gave a small chuckle "You know… you're kind'a funny."

"You think I'm funny? Dude, I know some jokes!" Beast Boy exclaimed, to which Raven freaked out a bit. "Keep the jokes to a minimum and I might let you off without a warning punch." Kevin said aggravated. Then he addressed Gwen "And my car got destroyed in the attack, along with our plumber badges so it looks like we're stuck here until we can contact your grandpa, babe."

Ben suddenly asked as if out of nowhere "Did anyone see where… ummm- she didn't leave, did she?" he looked around a bit before the subject of his question stepped up from around a rock and approached the group.

"Please, I look… nice?" she asked. "I… still don't know your name." Ben said, looking flustered. She paused stepped forward and said "In your language it would be Star… Fire." Ben blushed as he couldn't find his voice. Robin stepped up for him and said "Welcome to Earth, Starfire."

"I thank you all for your bravery and help, and I wish to ask permission to remain here, where the people are most strange, but also most kind." She said. "You don't need our permission." Raven said. Ben finally found his voice again and added "But if you want our friendship, you've got it."

"I guess we could all use some new friends." Cyborg said, and Kevin grumbled "Well my car did get destroyed, so I'm stuck he- owww." He got elbowed by Gwen. "Besides," Beast Boy added, "we kinda made a good team. Right Kev?"

"It's Kevin, not Kev, but it was pretty fun to beat those lizards senseless." Kevin let a laugh escape his lips.

"Is he always like this?" Robin whispered to Gwen. "You get used to it." She answered.

"So… Were you serious about wanting a house out here?" Ben asked Cyborg.

"Well… we would need enough space for all of us to live comfortably, so it would take a couple years to build, but it would be nice. Not like it will ever happen." Cyborg said. Ben and Kevin shared a knowing glance, then broke out in laughter.

"I don't get it. What's so funny?" Beast Boy asked as they continued laughing. "I also do not understand this- I believe the term is 'joke'?" Starfire said, confused.

"Just wait… until I can quit laughing!" Ben said almost tearing up. He finally straightened up and said "Hey Kevin, how good are you at only absorbing one species at a time?" Kevin's answer was simple "I've been practicing."

"How? Before you could only absorb several at once, and even then it was random." Gwen said, catching on to what the boys were planning, and disapproving almost immediately.

"Relax, babe. It's a simple matter of touching him while he's in whatever form he needs me to be, and immediately severing contact." Kevin explained. Only Robin had connected the dots, as he had been Batman's apprentice.

"You've got an alien at your disposal that can build a house that big in less than a day?" Robin asked, not convinced.

"Well I need two if this is going to work." Ben confessed. Kevin smiled "Whenever you're ready." Then Ben hit the dial. "Fasttrack!" he yelled as his form changed to the blue and black feline like speed demon. Kevin tapped him once on the shoulder and immediately changed into a perfect replica of Fasttrack. "Oh, Yeah! Now then, what do we need to build?" The Fasttrack that was Ben changed first back to Ben then to Grey Matter. "Anyone got a piece of paper?" he asked. By this time the others were used to the unexpected, and Beast Boy handed him a piece he pulled from seemingly nowhere.

The Galvan began to calculate and draw blueprints. When he finished, he handed them to Kevin/Fasttrack, who looked them over and began to run to the mainland and back several times, piling up construction tools and building materials. Ben then Changed to XLR8 and began helping to build the structure of the tower. When the two were done, a huge T took the place of the alien tower that had previously taken up the center of the island.

The tour of their new home was astounding, as Ben's Galvan form had thought of everything, excluding bedroom designs.