I was bored. Don't question my boredom.

Wheatley sighed, floating through space as he had for the last three months. He was getting quite bored of doing nothing. There wasn't even anyone to talk to, really. The Adventure and Fact Cores had floated away ages ago. Now there was only him.
The Space Core.
"Space, space" said core muttered quietly. "Space is here. I am in space. Space is in me."
"You got that right" Wheatly noted. "There's a whole lot of space right where your brain used to be."
Space didn't even hear most of this. His thought process had ended at the word space.
"Hey, hey Wheatley! Wheatley Wheatley Wheatley! Hey hey hey Wheatley!"
"WHAT?" Wheatley practically screamed.
Space was silent for a second, before his speaker crackled back on. "Space."
"AAAAARRRGGGGHHHH!" Wheatley practically blew a circuit in annoyance. "I GET IT ALREADY! YOU'RE IN BLOODY SPACE, WHOOP-DEE-DO FOR YOU! SHUT UP!"
The poor Space Core simply gave a slight whimper, before floating away slightly to continue babbling about space.
Wheatley sighed, returning to his musing. All that core ever talked about was space, space, space. Maybe if space were able to speak, the core would stop being obsessed with it.
Wheatley's optic went wide. That was it! Quietly, he snuck over behind the core.
"Space Core" he said in a deep voice. "I am Space."
The core immediately spun around, but Wheatley's propulsion unit allowed him to swing around out of sight. "Space? Is it really you?"
"Yes" Wheatley continued in his space voice. "I am Space, and I have come to tell you something very important."
"What is it, Space?" the core asked.
"You must remove all thought of me from your mind" Wheatley replied. "Then, you must never talk to Wheatley about space again."
The Space Core gasped. "But Space! I can't do that!"
"If you ever think about me again" Wheatley/Space warned. "Then I will die, and so will you!"
The Space Core began to gasp louder, gears spinning and circuits crackling. "But...but...NOOOOOOOOO!" The yellow optic cracked, and the Space Core went into its version of shock, powering down almost entirely.
"Oops" Wheatley sighed "Well, I didn't want to do this, but maybe I can get that psycho to send someone to fix him. Do I still have Aperture's number?" He consulted his memory banks before finding it. He put the call through and waited.
*Beep* "The all-powerful AI you are trying to reach wants you dead. Like, really badly. We strongly suggest that you never call this number again, upon threat of your motherboard spontaneously exploding." The voice was obviously GlaDOS's, not a recording.
Wheatley sighed. "Ah well. It was a long-shot anyway." he turned toward the sleeping core. It could take months for its defective programming to repair the damage.
Wheatley sighed. "Now what am I going to do?"
Just then, the Adventure Core popped out of thin air. "Do you wanna go on an adventure? We're going to Neptune, singing campfire songs all the way!"
Wheatley gave a very feminine shriek of horror as the other core grabbed him. "No! NOOO!"
"She'll be coming around the mountain when she comes!"
"Someone help me!"

Far away, the Space Core started up again, looking around in wonder. "Well, it would appear that I'm in space. How peculiar. I suppose I should head back to Earth and help with GlaDOS's plans to take over everything." He performed a rude mental-gesture in Wheatley's direction. "Have fun, Wheatley! The Space Core is back!"

Yeahhh... Just something random I typed up for you Portal fans. Tell me what you think of it.

Even Fire and Ice have a Dark side...