Disclaimer: Me want Zim, but me don't own any Invader Zim stuff. TT

Description: Zim encounters another Irken invader sent by the Almighty Tallest, who is supposed to help him. Now Dib suspects both of them are aliens. So, what happens next?

PF: An invader Zim fic! (Hops on couch and talks like Gir) I love this show.

Chapter one: Another invader

Ms. Bitters showed a pretty little girl, black hair and blue eyes, who was much cleaner then some students. "Class, we have a new student joining us today. Her name is Mer. If you have anything to say, say it NOW! Dib, what do you want?"

"She brought a dog to skool, and the dog is smelling Zim! Because he's an alien but that's not the point! She cant bring an animal to skool! If she was normal she would have known not to!" Dib screamed. Practically trying to find a reason to call her an alien.

"It followed me to school. I tried to get him to stay home but he wouldn't listen." She patted her dog on the head whispered something in it's ear and it marched out the door. She then looked around and shrugged. "Um, miss I don't see a place for me to sit." She looked at Ms. Bitters.

"Your right. You over there!" She pointed to a student next to Dib. "You've been expelled" He ran crying out of the room. "Take a seat."

On Mer's way to her new seat she pretended to drop her pencil over by Zim's desk. "Silly me. Here's an apology note!" She handed Zim a letter with strange writing on it that he recognized as the Irken language. He gasped and read the note quickly. It read:

Invader Zim,

I have been sent to you from the almighty tallest. I moved near your house and I will assist you in taking over the silly humans. It is very important that we work together else you will be discovered. we don't want that now do we! I will be at your house as soon as this pathetic skool gets out.

From, Invader Mer

Zim flinched when he read the note. "Ms Bitters. I need to go to the bathroom." He tucked the note into his pocket, glaring at Dib as he watched Zim's every movement. Ms. Bitters hissed and pointed a sharp pointy finger at the door. Mer giggled and waved goodbye to Zim. "Ewww." He shivered. Once he reached the bathroom he contacted Gir. "Gir! There is another Irken here! Be prepared for anything freaky or stupid to happen. Gir! Are you listening to me? Hello!" Gir was watching the scary monkey show. "GIR!"

"Okie-dokie!" Gir said. "Would you like fries with that?" His attention snapped back to the television. "I love this show. Bye now!"

"Gir, no! You didn't hear a word I said did you?" He screamed in frustration and returned to the class right before lunch. "Mer! We need to... talk."

"Yippeee!" She got out of her seat and followed Zim to the cafeteria. "So what do you want to tell me?" She said grinning.

"You shouldn't be here, and keep your voice down. Dib might hear." He led her into a janitors closet. "So you're an Irkan too?" She nodded and blushed a little. "And you are here to HELP me? That's the most ridiculous thing I've ever heard!" He doubled over in laughter.

"Oh Zim. You're so funny." She giggled. "But I am here to help. You really should change your disguise. That paranoid kid seems a lot smarter than the rest of them."

"Don't worry, I have everything under control! So you can just go back to Irk and-"

He opened the door and a large group of students started chanting, "Zim's got a girlfriend!" Repeatedly. Dib was edging toward the front trying to break into the closet to see what was going on.

"Ahhhhh!" Zim screamed and slammed the door shut.

"Of course you do. See ya later!" She left the closet, smiling. Zim left too, only to find Dib waiting for him in the hall.

"What do you want now Dib?" He said hatefully.

"Nothing. Accept that new girl in class. She almost acts as weird as you. But she's so... happy. All she does is smile, is that not weird?" He glanced behind himself and saw Mer laughing and giggling, talking to the other girls while sitting at a table. Pretending to like the food. Still poking it and trying not to eat most of it.

"That is kind of weird. But she's just a perfectly normal human worm baby. Go ahead and ask her." Zim pointed to her and Dib turned towards the cafeteria.

Looking back at Zim he said, "If she says she's a worm baby then she's an alien." He said. When he asked Mer she faltered but the girls she was with told Dib she was a perfectly normal girl. "Fine, But I'm watching you both."

Dib watched them the rest of the day, all the while listening to Ms. Bitters repeating the words "Cow lickers" because of some weird reason for doom.

Mer went to her house and got her dog. It was two houses down from Zim's place, and Dib followed her. It was a perfectly normal looking house and when she walked inside, Dib tried to sneak in. As soon as he entered the living room, two adults came to him and looked very angry.

"You must be our little pumpkins new friend. But that is no reason to break into somebody's house! OUT!" Her father opened the door and tossed him out. "Goodbye!"

Dib hid behind the fence and waited for Mer to come back out. No matter how long it would take. Much to his luck she came walking outside with her dog several minutes later. He followed her less then a block when he realized she was going to Zim's house. When he stopped, so did Mer. "Are you done following me now?" She turned and giggled. Remembering something she saw on T.V. the previous night, (When boys follow angry girls) she screamed and kicked him. "Stalker!" He hopped up and down in pain while Mer walked happily away.

"Zim! Yoohoo! I'm here now!" Mer knocked on Zim's door and much to her surprise Gir answered the door. He was colored red and pulled out a large gun. "Where's Zim?" She asked. Gir turned blue, put the gun away, and led Mer to the toilet. "Ew. Uh, thanks you first Tejay." Her dog turned into a robot and hopped in the toilet, followed by Mer.

"Ahh! What are you doing here?" He asked her.

"The note." She turned off the hologram, revealing her Irken form. She had light red eyes, like Zim and was about five inches taller. Then reached inside of Zim's pocket. "Duh." She wasn't smiling anymore but she didn't look angry either.

"Oh that." He looked stupid. "Oh look at the time, I have to go now!"

"Sit!" He sat. "Now. Everything about this place is pathetic, but we should probably tell the Almighty Tallest that I'm here now. I've bee quite busy since I got here." Zim nodded and told his computer to contact the Almighty Tallest.

"Oh, hey guys! How's it going? I see Mer is with you." Mer smiled and nodded. "So, Zim, you are getting a better disguise aren't you?"

"Of course not!" Zim exclaimed. "This is perfect already!"

Red interrupted. "Nu-uh. Look at Mer's disguise. Wait, it is better isn't it?"

"Of course Almighty tallest." She showed them her disguise for a brief second and released it again. "It took a while to find the right one, but it was there. Zim you should have looked longer. All humans may be ugly but humans seem too have horrible taste in everything. The food here is revolting."

"Very good Mer. Zim, you're doing slightly better then we thought. If you shape up then we can bring Mer back but that won't happen for a while now will it? Well, we have a new report coming in now, see ya."

"Goodbye!" Zim said. "I'll report back later." The image disappeared and Gir entered the room.

"Gir! You should be upstairs guarding the house from people like Dib! Go!" Zim commanded.

Gir considered this and made up his mind. "Okay! If you really want to be alone... Can I bring Tejay with me?"

"No! he might turn, you know stupid, like you." Mer grabbed onto her robot Tejay and put him as far from Gir as possible. "We really need to work on that robot of yours too Zim. Have you tried fixing it?"

Zim thought back to the time he fixed Gir and panicked. "Well, of course I have! It just didn't work. He was still stupid, I guess you could say."

"BYE BYE NOW!" Gir hopped into the elevator and left them alone.

"That was weird. Now. The disguise. Let's see." She reached into her pak and pulled out some human cloths. "Try this on. Now." She shoved the cloths into his arms. "Put this on over your head."

Zim refused to put on the cloths. They smelled like humans, but she forced him to put them on any ways. "It's hideous! Never will I wear this!"

"Yes you will." She laughed. "Because I say so." Mer got a computer and selected the disguise that Zim saw most fit, it turned into a disguise machine and Zim stepped reluctantly into it. He emerged in a puff of smoke. "There. Much better." Mer stepped back and examined him. "Now, I have things to take care of at my base. Bye Zim." She waved and departed.

"Grrr." Zim growled. "This is stupid! The humans are too stupid too see through even the simplest disguise, this one is so UGLY! Ah well." Then he left to go watch the Dib. Who was following Mer, staying between Zim and Mer's house so he knew exactly what they were doing... sort of.

PF: Okay, that's all for the first chapter. Review please and come back later for more! Right Gir?

Gir: Yeah! I'm gonna go watch the scary monkey show now (20 minutes later) I'm gonna watch it again!