Species: Acrosian

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Authors note- Normally I don't do this, but to make sure what happened in Alien Oneshots doesn't occur here. Here's the rules, one, no OC or species from other series, two, this is for the classic alien species not the new one due to a decrease in alien species, and three, no flames. Anyway, hope you enjoy this series and leave a like in the reviews.

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-Bellwood-

"Perhaps a road trip is not the best idea." spoke Rook.

"Why?"

"Because you have duties here and for some odd reason, this situation was enacted before with...strange results."

"Aw come on Rook, you just said sitting around sipping smoothies was mundane."

"Which I agree with, but it takes more planning than purely saying we should go. We would need to talk with your grandfather first to ensure we are not needed. Who knows what dangerous situation might come while we're aware."

Ben sighed. "Ugh, that's just great. What am I going to do now?"

"Well, I am not saying it is impossible, merely saying how you may want to run it by your grandfather just in case."

Ben sighed before looking at the omnitrix and blinked. "Hey Rook, do you think Azmuth added new aliens to the watch without me knowing? I mean he might have had secret functions added on this newer model."

"I am not sure, you could call and ask him." Rook said as Ben started playing with the omnitrix. "Wait, there might be repercussions to meddling with the omnitrix."

"Trust me, I know." He said. "But what's an all powerful watch without a little danger?"

"Haven't you used it long enough to know when to be cautious?"

"Yes, but I know some of the combinations." He smirked. "Plus Azmuth might have taken some of the bugs out."

As he tinkered with it, the watch started to turn a bright orange color.

"Uh, Ben? Is that normal?"

"I don't know." He said while the watch started to glow brighter and bright.

FLASH!

Which caused Ben to vanish as the omnitrix landed on the ground with a thud.

"BEN!"

(Elsewhere)

-Unknown location-

Ben screamed while falling from the sky and saw a large library with several large glass cages below him, all in a green and white coloration. "Wah! Oh crap! I did it again!"

As he fell he noticed a large chair near the floor and landed on it, back first.

"Ow!" he cried out with a wince and hiss before grabbing at his back. "Oh, ow...that hurt!"

When the pain finally went away, he looked around and saw the cages all around him while large bookcases lined the walls and floor, including a large orb in the center of the room with a diamond in the middle of it.

"What the hell is this place?" he asked confused while trying to stand up with a hiss. "Ow ow ow, still in pain."

He looked around while noticing all the cages had a letter on it and numbers from one to hundred and sixteen, each one either bigger than him or smaller than a mouse.

"Alright, think Ben. You mess with the watch, it flashes, you go falling down here, and now there's a bunch of cages." He said while walking to one of them marked 'A-1' and saw it was about the size of a large turtle. "And apparently the watch scanned a turtle while I wasn't looking."

He rubbed his head and tried looking into the cage. But there was nothing in it. "Weird, empty cages."

That was when he noticed a name on the side of the cage that read, 'Arcosian stretchigigas'.

"Wait an Arcosian?" he rubbed his head. "Why does that sound familiar?"

"Initiating simulation." Said a voice that sounded like David Attenborough as the cage opened up and a green portal appeared from it. "Activating body transference now. Narration active."

"Wait what?" He said before getting sucked into the portal. "Ahhh!"

(Elsewhere)

-Planet somewhere in the galaxy, planet's surface-

The planet, which looked like a large ocean with green patches in the center of the equator and the poles, came into view as the camera zoomed closer to reveal a thick chain of swamplands with tiny bits of land in the center of each island as said swamps were surrounding the islands like lagoons.

And for what lived there, it was fantastic life. From large insects with eight wings or legs to large fish with the same amount of limbs, it was a natural paradise.

This included a creature living near the edge of the swamp in a small burrow. It was looking out to make sure the coast was clear before slowly emerging from it's home.

The animal looked like a large lizard with a hard shell with a pink hue to it, large frog like legs with thick membranes around the four toes, a long tail with a paddle like tip, a long neck with hard scales on it about the size of a human arm, a flat skull with dagger like teeth, yellow eyes, and had large claws on the front the size of a small bear. It looked around as a transparent figure looked over the body.

"Ugh….what hit me?" The figure asked in pain. They slowly blinked before seeing the creature and yelped while jumping back. Only to realize he couldn't move at all. "Wait, what's going on?!"

"The planet Arcocan, three million years ago. A planet full of life in a swamp like environment." Said a voice from all around them. "Surrounded by oceans, life slowly evolved to adapt to the change in the water table that builds their habitat."

"What? Who was that?"

"For the Arcosian stretchigigas, their humble beginnings started out as simple ambush predators known as Arcosian armomegus, or just simply, the swamp sniper due to its strange adaptation to life in the swamp lands."

"Hello? Someone there?"

The creature walked around before spotting a large bug with ten wings and a stinger on it flying onto a rock. It sniffled the air before the head detached from the body and snapped on the bug.

"The ability of detachment has lead this species for millions of years to its current form. With the speed of a energy pistol, the Arcosian armomegus can snatch prey from the air or in the swampy waters that makes up it home." The voice said.

"Wow, kinda like a snake, except a little bit creepier."

The animal reattached it's head before walking into the water and started swimming like a toad.

"The Arcosian armomegus, with its webbed feet, can swim though the shallows like a small boat. And the claws on its forelimbs were best used to dig through the murky water like a nuclear drill, hunting for small insects or to make a new burrow when the water table increases and floods the old one."

The creature dug into the mud before making a new burrow and turned itself around towards the water's surface.

"Wow, that went by fast. Wait, what am I saying? Hello!? If you can hear me can you lend a hand out here?"

"These species lasted for about two million years with relatively no changes to its biology." The voice said. "However about one million years before the present day, a fascinating change occurred with the prey."

A large looking lizard with two eyes, long spines, no front arms, and two long legs with three toes walked to the water's surface for a drink of water as the Arcosian armomegus started to get in position. "Gi. Gi gig."

"RA!" The head roared while launching towards the animal.

"Gi gi gi!" It cried out before running away faster then the head could and ran out of the area.

"The introduction to bipedalism in the local ecosystem." The voice said as the figure began to realize the severity of the introduction of legs. "This new form of locomotion allowed local animal life to go one step ahead of the predators, including Arcosian armomegus."

"Ok, so it met something with legs that got away, so?"

That was when the area changed to show more two legged animals running around the swamp as the Arcosian armomegus looked really thin.

"Over a few million years or so, the use of bipedalism began to take root on Arcocan. From the smallest species to the largest of predators, the lifeforms increased in diversity as slow moving animals such as Arcosian armomegus began to decline in population." The voice said. "And with the threat of extinction, the Arcosian stretchigigas was almost at the doors of death."

"Wait, is that why I'm here? Just to watch some old sample of an alien that's dead? I didn't know the omnitrix could do something like that."

"But." Said the voice before it showed the creature starting to evolve in a rapid succession until it stopped on a larger version of itself, but with a more pronounced head and no limbs or a tail, just stubs where the limbs should be as it moved around like a worm in the water. "Over time, evolution would allow the Arcosian armomegus to evolve into a new species, Arcosian wormgigas, a species which utilized a heightened intellect in exchange for its limbs, a trait that would later lead to the evolution of Arcosian stretchigigas."

"Huh, sounds like it's gonna turn into some esper if it can't use it's limbs."

The creature wiggled through the mud before seeing its prey and detached its head before swallowing it whole.

"Through perseverance and competition, the Arcosian wormgigas would slowly but surely take over the role of top predators and become the most extraordinary species in the Draco Galaxy." The voice said before a portal opened behind the figure. "End of simulation. Arcosian stretchigigas DNA now usable."

"Woah!" The person cried out before getting sucked in.

(Elsewhere)

And appeared in the library again as the figure, now revealed to be Ben, crashed into the floor as the portal closed behind him and glowed a bright gold color.

"Ow…." He groaned before seeing a orange orb floating towards him.

"Will you continue your exciting exhibition in the Omnitrix Fossil Archives?" It asked in the same narrative voice from before.

"Wait, fossil archives?"

It looked at Ben right in the eyes, unblinking.

"So the watch can actually go so far back and tell what the species were like before now?"

"Will you continue your exciting exhibition in the Omnitrix Fossil Archives?" It asked again.

"Yes?"

It floated towards one of the cages marked 'A-2'. "Narration needed?"

"Considering I've never considered what they might be like, that would be helpful."

It blinked before floating towards the center of the room. "Activating DNA activation. Subject, Arcosian stretchigigas."

(Outside the watch)

Rook tried to rationalize the situation at hand while holding the omnitrix in his hands. "Oh dear, Ben? Ben can you hear me?"

FLASH!

The omnitrix activated as a green armored Arcosian with green eyes and a light pink colorization appeared in his hands, and sent him crashing to the ground in pain.

"AH!" He cried while the body slipped downwards and landed on his face. "Ah...ow…"

The body didn't move as Rook got his hands out and rubbed them in pain.

"Ben? Did you transform?" He asked while noticing that he wasn't responding, or breathing at all. "Oh no, I need to get you to Plumber HQ at once."

The only problem was that the armor was heavy and well, he wasn't that strong. So it presented a problem.

(Back in the omnitrix)

"So floating ball, just what am I gonna see next?"

"The Omnitrix Fossil Archives is a delicate archive in which species that are capable of evolution to be catalogued and studied for the next generation." The orb said. "Currently, one hundred and sixteen species are categorized into the system."

"Holy crap that's a lot." He said. "But what about Upgrade?"

"Galvin Mechamorphs are not part of the system due to being formed from machines, not evolution. Only species that are capable of evolution, organic and technorganic life are the norm for the collection."

"Ok, that makes sense." Ben nodded. "So why was I unable to move?"

"Archival data allows for simulated life, however, events of the past can not be changed. As such, the mind of the individual will only see the actions of the specimens, not control the actions of such unique life forms."

"So like a virtual reality game, but where all I do is watch."

The orb looked at him before Ben looked at the cage marked 'A-2' and saw a name, 'Aerophibian neurojigus', on it.

"Hey, isn't that Jetray?"

"Initiating simulation." Said a orb as the cage opened up and a green portal appeared from it. "Activating body transference now. Narration active."

"Not again!" He groaned before the screen went black.

To be continued.