Based off a picture I love. I know, I know, it's really late for Halloween, but I don't care.

Only pairings are ones you are trying to see. Oh, by the way, this is taking place in the Candy Palace. This is meaningless drabble. Really.

Disclaimer: I don't own Adventure Time. Or the gender-swap of it, either.

Candy people love Halloween. Prince Gumball was- and is- no exception. He was currently fixing his costume, excited like a little kid. One tiny adjustment after another kept him from showing off his costume to Fionna and Marshall.

Granted, he was more excited for Fionna's reaction. He smiled at his reflection. Perfect.

~In the meantime~

"So, what are you exactly?" Fionna asked, eyeing the Vampire King. Said royal smirked at her and bowed.

"I am an axe murderer," he announced. Fionna looked amused. He was dressed normally a gray tank top and ripped jeans. Actually, the only thing that really looked different was that he wore some type of bracelet that had studs on it.

"Would you really kill someone with your axe bass?" she asked, pointing to his guitar. He clutched it protectively to his chest.

"No!" he cried, "Do you know how hard it is to wipe blood off of her?" he demanded.

"And your guitar is female how…?" Marshall did not answer, so he tried a question that was sure to distract Fionna.

"And what's your costume?" he asked politely. Her eyes lit up.

"I'm a rock star!" she said, striking a pose.

"A bunny rock star."

"A bunny rock star," she confirmed. He shrugged. Leaning backwards so he was in a semi-sitting position while floating, he rested his guitar on his thigh and plucked a few cords.

Fionna, the girl of rock,

Wears a bunny hat,

Thinks that she's hot

Fionna blushed. "Marshall!" He was about to start up again when they were interrupted by a sharp cough. Gumball stood proudly. He wore a long scarlet-pink robe thing, with a huge white ruffle pinned to the top with a large pink gem. He smiled, showing two fake fangs.

"Like my costume?" he said, shamelessly twirling around. Marshall floated up to him.

"Have you been reading trashy vampire romance novels again?" Marshall demanded, raising an eyebrow critically. Gumball crossed his arms.

"Not Twilight," he assured.

"Whatever, man. So, who's ready to do some serious pranking and other mischief?" he asked, rubbing his hands together. Gumball coughed again.

"Actually, I'm hosting a party. I was wondering if you both wanted to come," he said. Marshall gave him a few seconds before cracking up.

"No," he said. Fionna bit her lip. She could be sociable and stay with Gumball, or go wild and nuts with Marshall.

Marshall swayed her. He planted his feet down, standing by her side, and offered his arm. "Shall we go and be mysterious little pranksters, milady?"

"Fluff yes! Sorry, PG!" she said, linking her arm with Marshall. The vampire grinned broadly, before he picked her up and flew out the window.

Gumball sighed.

~With Marshall and Fionna~

"Hey, Fi?"

"Mhmm?"

"Don't read stupid trashy vampire romance novels. You'll end up looking stupid and ridiculous." Fionna laughed.

"No problem, man. Hey, what's Twilight?"

"Something not to read if you respect me."