AN: I've been told I have a problem writing overpowered characters, so I took that, and ran with it. So this is 'Xander dresses as Q from Star Trek TNG for Halloween.

Warning: This is not meant to be taken seriously, as Xander with Q's powers are going to run roughshod over the storyline.

Q looked around the place he found himself, and it took only a thought to identify his location.

"Hmm.. This definitely isn't the Enterprise. Sunnydale California, October thirty-first, nineteen ninety eight. There's no continuum, and I'm not in my own body." with a small flash of light, an ornate hand held mirror appeared in his hand, which he gazed into.

"Yes, you are Alexander Harris. Dressed as Q for Halloween, and someone made you become me." He sniffed the air. "This stinks of Chaos magic."

"Xander!" A voice cried from behind him, and he turned to face a red haired girl dressed in revealing clothing. "Xander, thank god."

"I'm sorry, Miss Rosenberg, but Xander isn't home right now. I am Q."

"Oh my god, you turned into your costume as well. We have to find... Buffy!" Willow cried, as she spotted the currently brunet slayer. She ran over to the girl who was hiding behind a tree, looking terrified.

"Buffy, are you alright?" Willow exclaimed.

"What?" The girl asked.

"Are you hurt?"

"Buffy?" He thought for a millisecond. He was omniscient, he just had to find the knowledge amongst infinite information. "Ah, yes, Buffy Summers, the vampire slayer."

"You know of her?" Willow asked.

"My dear girl, I know everything." Q answered.

Willow turned to Q. "She's not herself. Can you do anything for her?"

"Well it would be handy to have the vampire slayer owe me a favor." With that, he snapped his fingers. In a flash of white light, the brown hair and gown were gone, and she was back to blonde, dressed in skinny jeans and a blouse.

"Oh, thank god." Buffy said. "It's like I was trapped inside, but couldn't do anything.

"Well you're all better now. You owe me." Q said.

"I'm sorry, but who are you? Xander wouldn't tell me who he dressed as, though I recognize the star trek uniform.

"My dear, I am Q."

"Just Q?" She asked. "Well that's a weird name. Anyway, we gotta find out who is responsible for all this madness."

"Oh that's simple." Q said. With a flash of light, a figurehead statue of Janus appeared in his hands. "All I need to do is smash this, and the spell ends. Care to do the honor, slayer?"

He passed the statue to Buffy who held it above her head, and smashed it down on the ground.

"Goodbye." Q said, as a wave of energy escaped the statue and flared outward, canceling the effect of the spell.

Xander rubbed his hands on his face. "Whoa."

He still felt it. Knowledge. He could feel the entire universe, and knew what the future held.

"Everybody okay?" Buffy asked.

After getting affirmative answers, Willow spoke up. "We need to gather all the kids back together and take them back to the school.

"No problem." Xander muttered, still bothered by his omniscience. He snapped his fingers, and a bunch of kids appeared in front of them, in flashes of light, all laughing and joking, telling stories about what they believed to be a very vivid dream, and inspecting their candy, which Xander had given back to them when they reappeared.

"How..." Willow was shocked, "How did you..."

"I dunno." Xander said, "I think whatever changed in me was to powerful too be undone."

"So you're now an omnipotent being? Cool!"

They walked for another minute, before suddenly Spike steped out from behind a tree.

"Well well, Slayer, A little birdie tells me that you are all weak tonight."

Buffy got into a fighting stance, ready to mouth off a one liner, when Xander grabbed her arm.

"Allow me." He snapped his fingers, and Spike vanished in a flash of light. In his place is a large ornate wooden box with a crank on the side. After all, Q doesn't do anything that's not ornate.

"What did you do?" Buffy asked.

Xander ignored her, and turned around. Crouching, he spoke. "Hey kids, which one of you wants to turn the crank?" A bunch of the kids raised their hands, shouting 'me, me."

Xander pointed at one of the kids. "You there, come forward."

The little girl dressed like a ballerina ran forward excitedly. She ran to the box, and spun the crank. As she did, the box emitted the 'pop goes the weasel' song. As it ended, the box popped open, and out shot Spikes head, attached to a spring.

"Ah!" Screamed Spike's head. "Bloody slayer, what have you done to me?"

"Don't look at me, it was my all powerful friend here." she laughed as they continued walking towards the school, Spike still shouting in the background.

After dropping the kids off with their parents, they retreated to the library, where Giles was still there, organizing the card catalog.

"G man, it has been one hell of a night." Xander said, as they entered. The three students sat at the table, Giles joining them.

"Wha- What has happened? Halloween is supposed to be a quiet night, for the supernatural."

Willow began one of her patented willow rants, "We got turned into our costumes and I was a ghost and Buffy was a noblewoman and Xander was Q and She smashed a bust and we all went back to normal except Xander and now he's all powerful."

"How do you mean, all powerful?" Giles asked.

Xander snapped his fingers and in two flashes, Buffy and Willow were dressed in bikinis.

"Wha- Xander!" They cried at the same time, Willow turning bright red, and trying to cover herself, while Buffy smacked him on the back of the head.

"Sorry, couldn't help myself." In another flash, Both girls were dressed normally, Willow no longer in her Halloween costume, but in her regular clothes. He turned to Giles. "Q is an omnipotent super being. He can literally do anything. He can remake the universe with a snap of the fingers."

"Dear lord, the power of a god in the hands of Xander Harris."