Meat

"You jerk." Dib turned to his enemy briefly.

"Eh…Erm—Well, it's your fault, sausage-human thing. You could have left me in my superior Irken form so I could have found the cure."

"What? You weren't going to find the cure for me if I hadn't put you in the same situation!"

"Oh, yes, that's right," Zim nodded awkwardly. "But you still shouldn't have spread your stupid condition to Zim because—well—I am Zim!"

There was a brief moment of silence. Dib contemplated something, and shuddered.

"Are you sure this isn't really fatal?"

"Of course not, Dib-stink," Zim reassured. "Your inferior human labs know nothing. Zim just lost his cool for a moment back there—though he quickly regained it—and I had momentarily forgotten that I hadn't designed the mutagen to actually kill you."

Dib cocked his head to the side—designating the upper part of his body as his "head". "You…hadn't?"

"No, Dib-human," his enemy told him. "Yet again, you fail to comprehend Zim's masterful plot. I intended to just turn you into a sack of meat so that you could sit by and helplessly watch me destroy your world."

Dib shook furiously. "If I still had my arms, I'd strangle you."

"Hhha!" Zim spat victoriously. "Too bad you don't! Wait, how are we even talking without mouths?"

"I dunno," Dib admitted. "And hey, don't make fun of me! Neither of us has limbs right now!"

"Yes, but, uh, Zim can improvise without limbs! Even as an Irken sausage-beast-Zim," the alien gloated.

"Improvise? How?"

"I still have my Pak, see?" Zim shifted to the side to show it. "I still have my mechanical spider legs—I feel them in there."

"Wait—I forgot you have an extra set of legs!"

"Of course I do, stupid."

"How am I stupid?" Dib shouted, inciting an eager bark from one of the dogs right outside. "Why don't you use your spider legs to escape?"

"Ehhuhh…" Zim scrambled for words. "I—uh—I thought of that, I just—eh…Silence!" He deployed his mechanical appendages and attempted to launch himself off of the couch.

"Uhhn…Ehh…nyuhh," he grunted, straining to lift his bloated body onto the floor. "Ehhhyehh uhhh uhhehhh…Eh, forget it." He retracted the legs and fell back onto the sofa.

"Well," Zim pointed out, "for now we at least have a comfy couch to sit on."

"And plenty of food," Dib noted, looking at their lunch-meat bodies.

Author's Note: Another episode continuation, as you may have recognized. I left out a key word to help make the "mystery" just a bit more challenging.