For two series that have many similarities, I am honestly very surprised that these two don't have more crossover stories, other than fan-art of course…

Zim paced around his base angrily, as Gir sat on the controls of their home, eating tacos with a pig. Zim had been pacing for what felt like days now, which was true. The Big-Headed Dib had ruined another one of the mighty Zim's fool proof plans. The hyoomans wouldn't have seen that giant dookie meteor if the Dib hadn't have made the plan backfire into the brilliant Zim. With every plan Zim made, the cursed Dib would find a way to ruin it. And the Armada would be here any day now!

"Curse the Fat Headed Dib!" Zim yelled into the halls of his base, Gir didn't even flinch as he shoved a pork taco into the poor pig's mouth, forcing it to indulge in cannibalism.

"Have sumore tacos pig!" Gir laughed as he gave the pig more and more tacos. Zim looked at the farm animal in disgust.

"GIR!" Zim yelled, "How many times have I told you not to bring that filthy pig into the beautiful Base of ZZIIMM!" Gir's antenna drooped as he carried the pig outside. With the pig-filth gone, Zim began to ponder more. Thinking of more ways to get rid of Dib.

"Time travel didn't work, shrinking myself didn't work, baloney didn't work," Zim said out loud, counting all the times he's tried to destroy the Dib, "WHAT CAN DESTROY THE DIB?!" Zim yelled at his computer.

"Why don't you try going somewhere else?" the computer asked. Zim stopped in his tracks.

"I COULD JUST LEAVE!" Zim yelled happily, "I'm glad I thought of it!" Zim yelled as if he found a planet made entirely of snacks, while the computer, just rolled its non-existent eye.

TIME LAPSE BY GIR SMASHING A TACO INTO THE SCREEN

Dib ran toward Zim's house, the alien hadn't shown his ugly face for some time now, so he must have been up to some plan to conquer earth. Dib's sister, Gaz, hadn't come along because she knew Zim was too stupid to cause any real damage to earth, no matter how much humanity deserved it.

Dib was just at Zim's house, when he stopped. There was nothing there. No home, no gnomes, it was as if the house was never there! The only clue that there was something there, was the now boarded up holes where the tubes of Zim's house once were. Dib stared in shock. Had Zim… left?

Dib smacked himself as he remembered that Zim wouldn't just leave Earth. He had a mission to destroy it! And Dib had a mission to get Zim onto a dissection table. Running back home, Dib got onto his computer, ready to find where that Irken had flown off to…

Unknown to Dib, Zim was nearly at his destination. He wanted to be far enough away so the Dib couldn't find him, but close enough so when his latest plan succeeded, Dib would be one of the first to die. Zim turned to his insane Sir Unit.

"Gir!" Zim commanded him, as the little robot's eyes lit up red.

"Yes Sir?" Gir said, saluting Zim.

"Gather as much information as you can on our new location, so we can make our new home." Zim ordered Gir. Gir did as he was told, and began to scan for whatever appeared normal.

Zim landed his Voot Cruiser right at the edge of the city, but as far away from the beach as he could. Zim then drew up the design for his new base, which had little-to-no differences than his last one. He and Gir put on their old disguises, and walked into their base, the Robo-Parents greeting them as they entered their new home.

Zim sighed as he shut the door.

"Whew. That was easy." Zim said as he entered his trash can.

THE NEXT MORNING

The knocking from outside the door got Zim's attention immediately as he looked at his computer screen. Two hyoomans, were outside his door, making steady rapping on the door. Granted, the knocking wasn't very loud, but still. How dare the hyoomans interrupt the amazing ZIM during his evil planning! Growling as he put on his fool-proof disguise, Zim threw open the door.

"WHATISITHYOOMANSWHATDOYOUWANTWHYAREYOUCONTINUINGTOBANGONTHEAMAZINGZIM'SDOOR!" Zim yelled at the two trespassers. The hyoomans were young, Zim could tell that, one male, one female. The boy was large, had black, curly hair, and a red shirt with a star on it. The girl had glasses, dark skin, and black hair. The fat pig- boy smiled, seeming to not care about ZIm's outburst.

"I'm Steven!" The boy said happily, "And this is my friend Connie!"