HELLO EVERYONE! this is my first Invader Zim story...actually, this is an IZ crossover with Regular Show. this is also a very special story, because it is co-written by my BFF, PerryRocks- Wolf Warrior! yes, so some of the chapter you read is hers. i'm really excited, and i hope you enjoy this! oh, and i should probably mention that i haven't watched Invader Zim much, and i never really watched it when it was on TV, so if i get anything wrong, don't hesitate to let me know! thanks, and enjoy!

DISCLAIMER: i DO NOT own Invader Zim, Regular Show, or any of their characters. i only own Rita, Gwen, and Sonya. i don't own Ava either, she belongs to PerryRocks- Wolf Warrior

Gir was sitting on the couch, watching TV. "I'm bored" he said out loud. Zim was down in his lab doing who knew what, and he seemed to be in a bad mood earlier when Gir had offered him some cookies that he'd made. Just then, a commercial came on TV. There was a beautiful park and a tall, lanky gumball machine suddenly walked in front of the bench.

"Are you bored with your life?" he asked.

"YES!" Gir shouted, staring intently at the TV. Then he gasped, his eyes widening as he zeroed in on the talking gumball machine. "GUMBALLS!" he shouted. He tackled the TV. "GUMBALLS!" he screamed louder. "Well then, if you just need to get away and relax, get connected to nature, then be sure to visit the park" the gumball machine was saying. "GUMBALLS!" Gir screamed.

"Gir! Keep it down!" Zim snapped.

"But there are gumballs on TV!" Gir whined. He got up from the couch and put on his dog suit. "I'm gonna go get me some gumballs!" he ran to the front door, but stopped and turned around. "I'll be back later… WITH GUMBALLS!"

"Yeah, sure" Zim muttered, not paying any attention.

MEANWHILE, AT THE PARK…
Rigby was sitting at the kitchen table, grumbling to himself.

Gwen walked over by him. "Hey Rigby" the raccoon grumbled. Gwen smirked. "What's your problem?"

"Nothing" Rigby snapped.

"Come on, tell me" Gwen said.

"My sister called this morning"

"sister? I didn't know you had a sister" Gwen said.

"I don't tell you every little thing about my life!" Rigby snapped.

Gwen rolled her eyes. "Ok, so your sister called. What's the big deal?"

"You don't know my sister" Rigby said. "She's… weird"

Gwen laughed. "Weirder then you?"

"yes! I mean, no! I mean… she's crazy, ok?"

Gwen frowned. "Crazy?"

"Yeah. As in, psychotic"

Gwen blinked. "Um… ok. And?"

"AND? She's coming to the park this afternoon!" Rigby shouted, flinging his arms in the air dramatically.

"Oh come on Rigby, I'm sure she's not that bad"

"are you two talking about Rita?"

Gwen turned as Mordecai walked into the kitchen. "If that's Rigby's sister's name, then yes"

"is she coming over or something?" Mordecai asked.

"I think so. Ask Mr. Grumpy pants over here" Gwen said, motioning toward Rigby. He glared at her.

Ava came over, "Hey Guys. What's up?"

"Oh, nothing much. i'm just DOOMED, that's all!" Rigby said.

"Uh, why?" Ava asked.

"my sister Rita is coming today"

"Oh, the humanity-wait, you have a sister?" Ava said.

Rigby sighed and nodded. "Yes, unfortunatly"

just then, there was a shout from outside. "OH !"

Rigby gasped and went O.O "oh no, she's here!"

Mordecai laughed and walked toward the door. He opened the door, "Rita?"

Rita tackled him, "MORDEEEYYYYYY!"

Ava laughed. Gwen giggled.

Mordecai laughed. "Hey Rita" he hugged her.

Rita grinned. She looked just like Rigby, except she was gray and had violet colored eyes. "WHERE'S MAH BRO?"

"Under the table" Gwen said, pointing.

Rita looked at her. "Who are you?"

"I'm Gwen. It's nice to meet you"

Ava grinned, "Come out Rigby! That's not nice to ignore your sister!"

Rigby grumbled and hesitantly came out from under the table.

"THERE'S MY BRO!" Rita yelled. She grabbed Rigby and hugged him.

Rigby sighed. "Hello Rita"

Rita laughed psychotically.

Gwen and Ava went O.O

MEANWHILE...
Gir was walking down the road toward the park. he was humming. "hmm hmm hmm..." He looked down and saw a bee. "BBBBBBEEEEEEE!" he chased it. He ran into a tree. "Bye bye bee!" he yelled, waving as the bee flew off.
He gasped when he saw the park up ahead. "GUMBALLS!" he screamed. He started running.

Rita giggled. "Bro, I've missed you!"

"Uh, yeah, you too" Rigby said.

Gwen smiled. "They're so cute!" she whispered to Ava and Mordecai.

Ava grinned, "I agree". Her ears suddenly perked up, "do you hear that?"

"What?" Gwen asked.

"It sounds like annoying shouts" Ava said.

"Yeah, and they aren't coming from me!" Rita said.

Mordecai snickered. "Come on, let's check it out"

"AHAAAHHH! GET OFF ME!" someone yelled.

"That sounds like Benson!" Gwen said.

"GUMBALLS!" shouted a voice.

Ava went O_O

they all ran outside.

Benson was on the ground, a small green dog pinning him down.

"GIMME GUMBALLS!" the dog screamed.

Benson turned red.

"AAAAAAAAHHHHHHHHHH!" Ava screamed and jumped into Rigby's arms.

Gwen and Mordecai grabbed the dog and pulled him off Benson.

"AAAAAAAAAAAAAAAAAAAAHHHHHHHHH!" the little dog screamed. "I WANT A GUMBALL!"

Rita grinned. She ran over to Benson, put a coin in the slot on his chest, reached into the little door, and pulled out a gumball. She handed it to the dog. "Here ya go!"

Ava went O.O and got off of Rigby.

Gir ate the gumball. "THANKIES!" he yelled at Rita.

She grinned. "No problem doggy!"

"What kind of dog are you?" Gwen asked, a little freaked out.

"I'm a mongoose dog! My name's Gir!"

Rita smiled. "I'm Rita!"

Ava blinked, "A MONGOOSE Dog? Is that possible?"

"YES!" Gir smiled.

"AWESOME!" Rita shouted.

"oh brother" Rigby grumbled.

"You ok Benson?" Gwen asked.

Benson sighed and nodded, getting up off the ground. "Yeah, I guess so. And who the heck are those two?"

"Well the crazy girl is my sister, Rita" Rigby said. "and the weird dog... I have no idea"

"I've never seen him before" Mordecai said.

Ava smiled, "He's a robot!"

"WHAT?" Gwen yelped.

"How know?" Gir asked.

"Dude, you talk robot, and your mouth ain't moving, so that's a costume!"

Gir blinked. "I LIKE CHEESE!"

Rita gasped. "ME TOO!"

Ava sighed. "Oh gosh!" she grabbed Gir's ears and pulled the hood back, revealing Gir's real head.

Everyone went O.O

"OH MY GOSH, YOU'RE A ROBOT!" Rita yelled. She smiled. "Cool!"

Gir laughed.

Ava grinned, "You like him, don't you Rita?"

"HECK YEAH! He's a robot!"

"I meant like like like"

"I LIKE LIKE PIE!" Gir shouted, laughing like a maniac.

Rita rolled her eyes. "No I don't Ava!"

Gwen giggled. "Denial" she whispered.

"So Gir, what are you doing here?" Mordecai asked.

"I saw the gumball man on TV!" Gir said, pointing at Benson.

Ava smiled, "oh the parks commercial"

Gir nodded. "YEPPERS!"

Rita grinned.

"Well, it was nice meeting you Gir, bye now!" Rigby said.

"Rigby, that's not nice!" Rita said. she looked at Gir. "You wanna hang out here for a while?"

"OK!" Gir yelled. "CAN WE MAKE BISCUITS?"

Rita gasped. "OMG, GREAT IDEA!" they both ran into the house.

Benson grumbled. "They'd better not break anything in there"

MEANWHILE...
Zim was done in the lab, and walked into the living room. "Gir, where are you? Gir? OH GOD! GIR!" Zim growled, facepalming.

he searched the house, but he couldn't find Gir anywhere. "Where could he be?" he ran outside and smacked into his neighbor, Sonya.

"Watch it Zim!" Sonya said. "Where's the fire?"

...

There was a loud crash.

Ava laughed, "Too late, B!"

"YAY! The bowl broke!" Gir shouted.

"I've got another one!" Rita said.

Benson and the others ran inside.

Rita and Gir were pouring stuff into a bowl.

"What are you two doing?" Rigby asked.

"We're makin' biscuits!" Rita said. She and Gir laughed.

...

"No fire" said Zim calmly, before busting out in anger, "JUST THAT GIR IS GONE TO WHO NOWS WHERE!"

Sonya blinked. "Well I'll help you find him"

Zim gasped.

"What?"

"DIB! I bet Dib took Gir!"

Sonya facepalmed. "Oh for the love of...!" she sighed. "Zim, I doubt Dib took Gir"

"LET US GO! WE CAN'T LET DIB DO ANY OF HIS SICK EXPERIMENTS ON GIR!"

...

Ava smiled, "Oi!"

"So what now?" Gwen asked.

"As long as they don't break anything else, I guess we'll just let them finish with their biscuits" Benson said.

...

Sonya facepalmed.

"Come, we must hurry!" Zim shouted.

Sonya sighed, but followed after him.
They ran down the street to Dib's house. Zim banged on the door. "OPEN UP, I DEMAND THAT YOU RELEASE GIR!"

the door opened.

Sonya sighed. "Hey Dib" she said.

Dib went O.O "Sonya! What are you doing here with HIM?"

"RELEASE GIR, FILTHY HUMAN!" Zim shouted.

...

Suddenly, the oven blew up.

Ava went O.O, "Oh my!"

"YAY, EXPLOSION!" Gir yelled.

Rita giggled. "Dude, you rock!"

"daaawwww!" Gwen said, smiling.

Rigby facepalmed.

...

Dib shut his door closed.

Zim banged on his door, "DIB!"

Dib opened the door, but only got to be hit in the face several times by Zim banging on his door.

Sonya grumbled and grabbed Zim's arm, stopping him from hitting Dib any more. "Look Dib, Gir is missing. Have you seen him?"

"No"

"oh, ok then" Sonya said.

"LIES!" Zim shouted.

Dib facepalmed. "Look, I don't have Gir, ok?"

"LIAR!"

Sonya grabbed Zim. "Ok, thanks Dib. Sorry to bother you" she started to walk off, pulling Zim with her. Suddenly she gasped. "ZIM!"

"What?"

"Doesn't Gir have a tracking system?"

Zim went O.O "yes... yes, he does! "Quick, BACK TO THE LAB!"

...

Ava grinned.

DING!

The timer went off.

"BISCUITS ARE DONE!" Gir yelled.

...

Zim happily pulled out his detector, "YES!" Suddenly, the batteries died. And it fell from Zim's grasp. "NNNNNNNNNNNOOOOOOOOO!"

Sonya sighed. "Dude, calm down"

"DON'T TELL ME TO CALM DOWN!"

Sonya walked over to a drawer and pulled out a pack of batteries.

Zim blinked. "Oh. I forgot I bought those last week" he took the batteries and put a few into the detector. "Gir, here we come!"

...

Ava got them out. They looked flat, and disgusting.

"YUMMY!" Gir shouted. He and Rita each took a biscuit and ate it.

"Wow, real burnt flavor!" Rita said.

Gwen giggled.

"Oh boy, this is going to be a long day" Rigby muttered.

well, how was it? i think we did a good job, and thanks so much for writing it with me Sara! i can't wait to get started on chapter 2! PLEASE REVIEW, and i hope you enjoyed this!

-FreddysNightmare1984