A whole bunch of you wanted Onion to fight various people. This is a compilation of those specific fights. Also, I'm sorry for being so inactive. School is very hard work.
Malachite vs. Onion
Onion was messing around doing his usual criminal activities when Malachite burst out of the ocean.
She hissed, and immediately crushed Onion with a giant fist.
Onion is dead now.
Onion vs. Centipeedle
Garnet was cleaning the burning room when Steven came in somehow. I don't know how, but he got in. Seriously, Steven. What kind of magical powers do you have? Oh right.
"Hey cool! Centipeedle!" Steven says, pointing to a bubble with a green gem in it. He pops it, and Centipeedle's gem falls out, instantly regenerating into the hideous monster.
It scurries out of the burning room and into Beach City, where it comes across a young boy named Onion.
It hisses, and tries to spit acid at him.
He calmly dodges the acid, and snaps the corrupted monster's neck. To finish the job, he grinds the gem into tiny shards with the heel of his boot, effectively killing Steven's beloved pet.
Ruby vs. Onion (This one was requested quite a bit)
Ruby was alone, still in the Homeworld ship.
She heard a door opening, and footsteps. Jasper, maybe. Or even Peridot.
The steps were coming closer.
Closer.
Closer.
Closer.
Closer.
Finally, a mysterious silhouette stopped in front of her cell door, and turned to face her. It walked out of the shadows. Onion.
He was wielding a machete, surprisingly large for a boy of his age.
His eyes turn a demonic red, and he walks through the cell's electric shield.
Ruby is paralyzed from fear. This unholy child is too much for her to bear, and she breaks down, crying.
Onione ends her pain with one slice of his blade, stabbing right through her gem.
He walked into the sunset, his job completed. Homeworld would be satisfied.
Those were the three that really stood out to me. Onion is basically the spawn of Satan. But anyway, thanks for reading, and don't forget to suggest a fight!