Another crazy Invader Zim crossover, I know. But I hope you all enjoy this story anyway. I personally think it's a pretty good idea, and would love to hear some reviews from you all about it.

*I don't own Invader Zim or Pokémon!*

Dialogue Key

"Invader Zim, reporting for duty!" = Regular Speech

'You quit your banishment?' = Someone's Thoughts

"Charizard, the Flame Pokémon." = Someone Yelling

"When competing in intense battles, Charizard's flame becomes more intense as well." = Poké Dex Entries

The Journey Begins - Part 1

'PRIORITY ALERT: INCOMING MESSAGE FROM THE TALLEST!'

'Attention Irken Soldiers!'

'You are hereby ordered to report to the Irken Controlled Planet, Conventia, to witness the Great Assigning effective immediately. The time has come for the Irken Army to rule the universe with an iron fist… yada, yada, yada… blah, blah, blah, blah, blah… be prepared to launch OPERATION IMPENDING DOOM II!'

The words of this message flashed across the screens of control consoles belonging to Irkens all across the universe as they began to congregate on a planet that appears to be a purple version of Saturn with a single mechanical ring around it. Ships of varying designs, sizes, and shapes flocked to the planet. Each one bearing the mark of the Irken Armada, and each one housing one or more Irkens who are preparing for possible war.

"Welcome brave Irken soldiers. Welcome to Conventia: the Convention Hall Planet." greeted an alien on a television screen within the planet's outer atmosphere. "Please proceed to the docking ring and take the complimentary teleporters to the planet's surface."

The Irkens did as instructed, each ship arriving at a docking port where the Irkens were teleported to the surface of Conventia. Long tubes sprouted from the docking ring and connected to the various ships belonging to members of the Irken Armada. These tubes glowed yellow as each Irken was broken down into tiny molecules before being sent out to what appear to be sattelite dishes. Each one shot a beam of pink light down to the surface of the planet as hundreds, thousands, maybe millions of Irkens were teleported. Quite the light show it makes, I must say.

As the pink beams of light hit several probes that look like smaller versions of Conventia, the Irkens were rematerialized in their true forms.

Irkens are a race of insectoid humanoid aliens that are short in stature. They have two clawed fingers and a thumb on their hands, a pair of antennae on their heads like various types of insects, large, bulbous, pink compound eyes, and their skins are varying shades of green. They also have a metal backpack on their backs that look almost like ladybug shells, but these are actually high tech devices known as PAKs, which carry an Irken's internal weaponry and are also their life support systems.

"Please be sure to visit the gift shop for all kinds of cheap, useless stuff. If you're here for the great assigning, please remember where you parked and proceed to the main convention hall." the same alien instructed.

A vast majority of the Irkens marched along as they made their way to their intended destination, all the while an animatronic squid (for lack of a better way to describe it) was repeating a single phrase.

"Galactic conquest is near! Galactic conquest is near!"

As they neared the main convention hall, the Irkens passed by X-Ray machines that were there to ensure nobody brought anything illegal into the area. And so far, it seems like nobody has. As the last Irken soldier made his way into the convention hall, that same alien from before began his final announcement.

"Now, wiggle your antennae in salute, because here they are! Your all-knowing, all-powerful leaders: THE ALLMIGHTYYYYY TALLEST!"

A dome in the center of the hall opened up, releasing a small cloud of steam as the gathered Irkens closed their eyes and began to wiggle their antennae as instructed. The top half of the dome kept rising as two spheres flew up and around giving off a small laser light show. Two rods shot down from the top half of what was once the sphere and created a hologram screen as a platform began to descend from the ceiling. And on that platform are the Irken leaders: The Tallest.

The Tallest, known as Red and Purple, stand at a whopping five feet tall and look drastically different from every other Irken. They both wear thick armor on their torsos and forearms while only having two long and spindely fingers. Their own torsos are very thin, causing them to stand with a bit of a hunch like an igor, and their PAKs are much larger and bulkier. They also wear a pair of robes on their lower bodies, and they hover to get around since their legs can no longer support their weight. Their names are Almighty Tallest Red and Almighty Tallest Purple. As their names suggest, Red has red colored eyes and his robes and armor are mostly red with some black mixed in. And Purple's attire and PAK are varying shades of purple.

Red laser beams shot out from the base of the platform as the Tallest descended from on high to mingle with the commonors. The Irkens in the audience went wild at the fantastic display as his leaders descended down.

"Thank you! Thank you!" said Almighty Tallest Purple.

The two waved at their adoring subjects. Well, more like their shorter and more inferior Irkens, but they don't say that out loud.

"See? I told you they'd like the lasers." bragged Almighty Tallest Red.

"Everything is lasers with you!" Purple complained. "I'm telling you, smoke machines are what the people-"

Purple yelped in pain as he was hit in the eye by a small laser that misfired. It didn't kill him, nor did it put his eye out, but it did hurt like the dickens. But the rest of the crowd went absolutely nuts, seeming to not care that one of their leaders is hurt.

"See?" Red bragged further to his downed fellow Tallest.

The platform finally landed on the ground as the lasers stopped firing. The crowd settled down as one of their leaders began to speak.

"Welcome, mighty Irken soldiers. You are the finest examples of military training the Irken army has to offer. Good for you." Red began as Purple got back up while rubbing his injured eye. "Standing behind us, however, are some of the soldiers we've chosen for roles in one of the most crucial parts of OPERATION IMPENDING DOOM II!"

A large, holographic screen lit up behind the Tallest revealing a huge map of the cosmos. The crowd began to cheer once again, happy for their fellow invaders who will be risking their lives to expand their already vast empire.

"You in the audience just get to watch." Red said.

"You should have tried harder." quipped Purple.

"These superior ones…" began Almighty Tallest Red.

"Not quite as superior as us, of course." Almighty Tallest Purple interrupted.

"Psh! Duh!" Red continued. "These less superior than us, but still quite superior soldiers will each be assigned to an enemy planet!"

"There you will blend in with the native inhabitants." Purple instructed before Red took over.

"All while gathering crucial information, assessing the planet's weaknesses, making it vulnerable to our… big… spaceship… gang."

"The Armada." Purple said, correcting his fellow Tallest. "NOW LET THE ASSIGNING BEGIN!"

This time, the crowd went silent, with only a single 'WOO!' being heard from one of the more spirited Irkens.

"Step forward Invader Larb."

The first of the Irken invaders quickly stepped up to the Tallest and presented himself. The Tallest smirked at the sight of this particular Irken, noting that he seems to have had a growth spurt.

"Ah, you seem to have grown since last you stood before us, soldier." Almighty Tallest Red noted, referring to his new height.

"You've been assigned to Planet Blorch, home of the Slaughtering Rat People." Almighty Tallest Purple announced.

A floating monitor showed a picture of Larb screaming as he was attacked by the vicious rat people. Poor Invader Larb began to shed tears at the sight of himself being dismembered in such a gory fashion.

"Why would you draw that?" Larb asked in a voice barely above a whisper.

"However, because of your increased height, we have decided to give you the planet Vort, home of The Universe's Most Comfortable Couch." Red said as the Tallest smiled at the invader.

The moniter changed the picture from Larb being attacked to a picture that shows him sleeping on a very large, comfortable, and luxurious couch.

"Yes!" Larb cheered.

He accepted the data pad from his leaders and quickly ran offstage to read the details pertaining to his mission.

"Next: Invader Spleen!" announced Purple.

Next to walk up to his leaders is a male Irken with a rather tall head with a band-aid above his left eye ridge. The two leaders made a collective sound of amazement at this invader's ability to support the weight of such a heavy skull without the use of technology or psychic powers. Although this likely means that he's going to have very strong psychokinetic powers in the future. Only time will tell.

...Meanwhile…

"Move it, move it! Invader coming through! Move it! Get outta the way!"

A small Irken vessel was speeding through space towards Conventia as a latecomer was just arriving. And whoever it is definitely seems to be in a hurry to make it to the great assigning. Their ship squeezed its way between two larger vessels as the teleporters connected.

Just who is this late Irken?

...Meanwhile (Again)...

"And last: Invader Skoodge!" announced Purple.

The final invader to step up is an Irken who is quite short, very pudgy, and wearing a uniform that has what I assume to be grease stains everywhere.

"Oh, now that's just sad." said Red as he saw this Irken.

"Could you get any shorter?" Purple asked rudely.

Skoodge had nothing to say to excuse his slip up with his uniform.

"You will be assigned to Blorch, home of the Slaughtering Rat People, thank you." Almighty Tallest Red said simply.

Skoodge grew fearful at such a dangerous mission like this one, not wanting to go to a planet where he could possibly die. But it seems this is his lot in life.

"Thus concludes…"

"Hold it! Hold everything!" exclaimed a voice belonging to a woman.

All of the Irkens, including tallest Red and Purple gasped in recognition as they saw two Irkens walking towards the main platform where the Tallest and the Invaders are currently stationed. One of them looks much like all the other Irkens, but he's a little shorter than every single Irken in the gathered arena. But the other Irken, they all know well.

"Talles Miyuki…!" gasped Red.

"You're alive…?" gasped an equally shocked Purple. "And why is Zim with you? I thought he was banished after destroying the Irken homeworld and ruining Operation Impending Doom I."

Miyuki has very pale green skin and icy blue eyes that have the visible eyelashes of female Irkens. Her antennae are also curved inwards instead of folded at the end. She used to have a body type similar to that of Red and Purple, but after some, in her opinion, much needed physical training, she gained a perfect hourglass figure with curves in all the right places that any other Earth woman would kill for. She strode forward with the small Irken keeping a hand on his back for support as the two made their way towards the new Tallest.

She and Zim came to a stop at the base of the platform as Miyuki proceeded to gaze directly into her two successors' eyes, the very look boring deep into their souls as if searching for something. Though, what that could be, I have no clue.

"News of my demise was greatly… premature." Miyuki stated. "It is no secret that I was attacked by an Infinite Energy Absorbing Blob created by this young Irken scientist, Zim, during the early years of my reign. What no one really knows is that it was one of Zim's jealous colleagues who unleashed the blob and caused the destruction of our homeworld, leaving poor Zim to take the fallout. I awoke in the rubble in great pain. It became clear to me that as Zim was doomed to exile on our dying world, I too was trapped with him. But this turned out to be a blessing."

Miyuki closed her eyes and pat Zim on the head, glad that her (secret) son had risked his life to save hers all those years ago. It's another reason why Zim was looked down upon back then. His unwavering kindness to those who deserve it.

"In time, using a special Cryogenic Healing Pod, Zim healed my wounds and helped me train to become as I am now. The solitude allowed both of us to make leaps and bounds in Iken technological advancement. That was when we received a transmission about an Operation Impending Doom II. We took Zim's Voot Cruiser to Conventia, and heard word of this new attempt at galactic conquest. Which leaves us only one question."

Miyuki opened her eyes and once again fixated her gaze on the two new Almighty Tallest.

"Why was I left for dead? Abandoned?" asked Miyuki as she stepped forward and glared at the Tallest harder. "...Why?"

Red and Purple's eyes widened drastically out of fear. It's no secret that while Miyuki loves peace and wanted to make the Irken Empire stronger through diplomacy rather than conquering, she was despised by her, at the time, fellow Tallest: Almighty Talles Spork. He arranged for her death, but died in the process. This left Red and Purple in charge.

They needed to say something to save their skins. And quickly!

Fortunately, Purple the blabbermouth saves the day.

"The… the blob, it… it caused an explosion that collapsed the central power core chamber! The last thing anybody saw was you charging into the experimental Space Bridge portal to try and evacuate! No one saw you come back out!" he exclaimed as he tried to reason with the female Tallest.

Miyuki's glare lessened as she thought about this. She knows Red and Purple aren't to blame for this. It's Spork. But since he's dead now, she needs a way to vent her frustrations. Luckily, she knows the perfect method.

"I find your reasoning to be… logical."

Red and Purple sighed and visibly relaxed, glad that they would no longer be in any danger of being killed by the female Tallest's righteous fury. Miyuki walked up to the podium with Zim close to her and addressed her people.

"Attention all Irken Soldiers. Now that the truth of what happened during Operation Impending Doom I has come to light, the Irken known as Zim has been forgiven of the crimes with which he was accused. No longer is he banished. He too shall be an Invader for the Irken Empire, joining me on a joint mission to seek out a new world in the Gamma Quadrant, and observing the natives of the planet I have chosen to see if it is habitable for Irken life." she announced. "Now, let us commence OPERATION IMPENDING DOOM II!"

The crowd of Irkens cheered in response to this decree from their Tallest and began to file out while the Invaders got ready to travel to their destinations.

Little did they know, someone has become aware of their plans...

...Meanwhile, on a Planet Far, Far Away…

"...They're coming!"

A pale boy with glasses, black hair in the shape of a scythe, hazel eyes, wearing a dark blue shirt with a frowny face on the front, a black trenchcoat, pants, and shoes, stood up from his listening place on the roof of his house. He jumped down, holding onto the gutter pipe to slow his descent.

Inside the house, however, a girl with equally pale skin, purple hair that looks like a beast's open mouth with four fangs, wearing a gothic style dress, opened the fridge for a beverage. But it seems as though there's none of the drink she desires. And this leads her to only one conclusion.

"Dib drank the last soda. He will pay…!" she growled.

Finally, the boy from earlier, who we now know is Dib, slid down the gutter pipe before jumping into the kitchen through the open window. Unfortunately for him, he miscalculated where he was going to end up and fell into the kitchen sink with a loud splash of soapy water. But he quickly surfaced and seems unaffected by what just happened.

"They're coming!" Dib exclaimed.

Climbing out of the sink, he rushed over to his father and tried to get his attention. The man is known as Professor Membrane, and he looks like a grown-up version of Dib as a scientist.

"Dad! They're coming! I heard them! I was up on the roof, and I intercepted this transmission that…"

Professor Membrane quickly shushed his son.

"Not now, son. I'm making…" electricity sparked from what he was working on before he held it up. "...Toast!"

Dib just ran over to his sister, not having time for his father's 'Super Toast' experiment. His sister was sipping a juice box when her stupid brother decided he just had to get up in her face.

"Gaz, they're coming! They really are!"

"Who's coming, Dib?" Gaz asked.

Dib just looked at the starry sky and said three simple words in response.

"I don't know."

...Back on Conventia...

"This is your Standard-Issue Information Retrieval unit. Also known as a SIR. It'll assist you in gathering crucial information for your mission." Tallest Purple explained as he showed the assembled Irkens a small robot.

The robot itself is built with a large head, red optics and details, a pair of claws for hands, and a small body. The fact that they're designed to be shorter than most Irkens is likely due to the culture of this race. How height determines your status in Irken society. And judging by how some parts of the head and body look thinner than the rest, it seems likely that they can compact their own bodies for easier transport.

"It's also a thermos." Tallest Red said.

"Who wants this one?" Tallest Purple asked as he held up the robot.

"I do!" said a random Invader.

Purple threw it to the Invader resulting in a loud, metallic smack as the invader got hit in the face by his new robot.

"OOF! ...Thank you…"

"Everyone else, line up and take a robot." Red instructed.

The shorter Irkens, and Miyuki, all lined up and awaited their turn to claim a SIR Unit of their own. A long, thick cable ejected from the pillar up above, and several tiny robots in their compact modes slid down to be claimed by Irken invaders. The first one activated itself and got ready for possible combat. This one, it seems, belongs to Invader Larb.

"SIR, go warm up my ship's engines." Larb commanded.

"Yes, Master! I obey!" The SIR responded with a salute.

The little robot walked off to complete his task like an obedient machine with Larb following close behind. Smiling at the chance to help out the Irken Empire in a more proactive way, Zim walked forward to claim his own SIR.

"Finally! A robot slave of my own!" Zim said to himself.

But before he could try to claim one of the standard SIRs that were being given out, Miyuki placed a hand on Zim's shoulder and stopped him. The young former scientist looked at the female leader of the Irkens in confusion, wondering why she is stopping him.

"Zim, in light of some recent developments, I've constructed a special assistant for you."

From behind her back walked a SIR that looks much different from all of the others. For one thing, while the other SIRs lack a visible mouth, this one does have a mouth. Its optics, square chestplate, and the ball joints in its shoulders and wrists, along with the little transceiver bulb at the top of its antenna are all glowing a greenish blue instead of red. Even the style of its hands looks different compared to the other SIRs.

"It looks kind of… not good." Zim said, thinking the machine was outdated.

"Looks can be quite deceiving, Zim. Just give the little guy a chance, and I'm sure you'll find in him a best friend and possibly even a brother." Miyuki said with an encouraging smile.

Something that confused Red, Purple, and the rest of the Irken Invaders. They thought all Irkens never use their emotions more than necessary, and mostly just follow the will of the Control Brains. This behavior that Miyuki is showing is such a foreign concept to them all. Suddenly, the strange SIR's eyes flashed from greenish blue to red as the optics narrowed.

"Gir, reporting for duty!" he said whilst saluting Zim.

"G.I.R.? What does the G stand for?" Zim asked.

"I don't know." Gir said with a dopey smile as his eyes changed back to their original color.

Zim simply stared at the robot as Gir started to go absolutely nuts like a bored child. And this is definitely something Zim thought might have been a malfunction.

"Um… is it supposed to be stupid?" Zim asked Miyuki.

"He's not stupid. He's hyperactive." Miyuki replied.

Simply choosing to accept the words of his leader, Zim managed to get Gir under control long enough for the three of them to head to Zim's Voot Cruiser, where Miyuki's own SIR Unit known as Pandora is waiting for them.

*To Be Continued…*

Thanks a bunch for reading, everybody. I hope you all like the idea and have a blessed day. See you all next chapter! But first, let me know if the reviews: which of these three Pokémon do you want Zim to have as his starter?

Rowlett

Litten

Popplio

Let me know which one you want it to be!