When something crazy happened, there was only one possible explanation.

Well, actually, crazy things had many explanations, but Captain Kathryn Janeway recognized this brand of crazy.

"Q!" she yelled at the sky, pounding the ground with a hoof (it seemed the easiest way to get someone's attention in this body) "What do you want from me this time?"

Far off laughter sounded, and she exhaled loudly through her nose. It made a soft neighing sound, and she heard the far off laughter again, joined by closer laughter.

She whirled on her crew, nearly falling over. "This isn't funny!"

A pony that (based on the Delta Flyer marking on his hindquarters) she guessed was Tom Paris suppressed a chuckle. "Sorry, Captain, but it's hard to be serious when we're multicolored ponies."

She sighed. "I know it seems silly, but let's not lose our heads. We don't know where Voyager is or even what planet we're on."

"And here I was, thinking you would be different from Jean-Luc. How foolish of me."

Janeway whirled around again, and this time landed in a pile of short, stubby limbs. She got to her hooves angrily. "Of course we're going to be concerned about our ships, we're - what, exactly, are you?"

The strange creature that spoke with Q's voice spread his arms. "I am a draconequus! Spirit of mischief and disharmony! Here, they call me Discord." He indicated himself.

"An appropriate name," Janeway said drily. "Why did you bring us here, 'Discord'?"

"Why do I need a reason, Kathy?"

"You usually have one."

"Maybe I just enjoy it when things are mixed up. I have to say, Kathy, you make a lovely pony."

She wrinkled her nose, and continued on her line of thought. "You have a son. You're a responsible adult now. Or at least, you have to set a good example," she added quickly.

"And bringing you to a very safe, happy place isn't setting a good example?" Discord asked innocently. "Your ship is fine, your crew is fine, you're fine." He spread his mismatched arms. "Why don't you explore a little? Relax. Let your hair down. Metaphorically speaking," he added, glancing at her mane.

Janeway fixed him with a hard stare.

"Fine, be that way," he said, and vanished in a flash of light.

She sighed.

"Everyone, spread out. After all, we are explorers."

But Uhura was born way too early to be Captain Janeway's magical girl mentor. She'd be something like eighty years old when Janeway was old enough to attract Kyubey's attention, and that was the lynchpin that this whole story revolved on. I'll just have to look through someone else's posts, unless I decide to make another concept and use fewer fandoms in it.

The Doctor banged on the wall/door/force shield on his cell. "For the last time, I'm not the saboteur!" he yelled, kicking the door in frustration.
Staring intently at the ensign whose name he couldn't remember, he said, "Can I at least talk to the ship's Doctor?"
The girl nodded, and pressed a button on the intercom. "Brig to Sickbay, the prisoner has requested Dr. McCoy's presence."
Things were silent except for the beeping that all the computers on this ship seemed to enjoy doing.
McCoy walked up a few minutes later, looking like River did when the Doctor did something monumentally stupid. Meaning pissed. "I'm not letting you out. You landed Jim in the hospital, and now he has yet another food allergy."
"I'm not trying to escape. It's just, your saboteurs are shapeshifters."
This didn't surprise McCoy as much as the Doctor thought it would. "Okay... you could've been a bit more original, anything else?"
"Um... their true form is red, and very big, and covered in suckers. The best way to kill them is to shoot them."
The Doctor realized to his horror that as he was speaking, McCoy had turned into exactly what he had been describing. Gulping, he jabbed his sonic screwdriver at the force shield, which exploded into a field of sparks. "Nice meeting you, but I gotta go," he said, before running very quickly away.

PMMM/Doctor Who

---

"You shouldn't be here."

"Why not?"

The Doctor paced around the TARDIS's control suite, glowering at the consoles and not looking at the interloper. He smacked something with a hammer and the ship lurched violently, spiraling off through space and time to get as far away as it could. He fought for hours, he fought for days, hurling his ship through the universe and even outside on occasion.

Still she stayed.

"Why won't you talk to me?" She asked on the twelfth day.

"Because you shouldn't be here."

It was the only answer the Doctor ever gave her, and then things got tricky for her. She wanted to help people who were in pain, and he was, oh, how he was. She wanted to take the pain away. Always.

He threw her off and he ran and ran, going on forever and going through forever. Regenerations came and went, and still she stayed, watching him. Sometimes she wanted to protect him more directly, but one of her merest arrows could sunder a whole world. So she stood, and waited.

"Why won't you talk to me," she asked on the last day.

The Doctor sighed and turned. He was old now, impossibly old, still going through the universe and touching lives. "Because... because you're asking the wrong questions."

He parked the ship on a deserted beach on an unknown world.

"Then what's the right question?"

"You've had thousands of years," he wheezed, "and you haven't come up with the answer?"

"Um... why shouldn't I have been here?"

"Ah. Well, that's on the right track. Ish. You should have been spent long ago, spent and used up and thrown away."

"Are... are you frightened?"

"Yes. Of you, before you ask."

"Why?"

"Because I..." The Doctor fought for breath. "Because I remember what you did. What my people made you do, made you into."

She looked at him blankly.

"Oh, hasn't it happened yet? Hah, time for you, I suppose. All... what was it that I used to say? Timey-wimey or some such thing. Youth. Gets you in the end, doesn't it? Well, it's time I stopped running away from, I think."

"You'll let me take away your pain?" asked Madoka Kaname.

"Yes," said the Doctor, and became the first victim of the Nightmare Child.

---

Rastamouse (yes, it's a real show)
Barney The Dinosaur
Beetleborgs
Charlie Chalk
Dennis The Menace

Let me try this. I choose Doctor Who and Sherlock:

"Going back in time and changing history; that's cheating," Jim remarked with a glimmer of amusement.

"A trick I learned from an old friend," Spock Prime replied, unfazed. He leaned back ever so slightly thinking of old times and of a friend

Of course, Spock was but a child when he met him. A rather mysterious fellow he was, who insisted on being addressed as the Doctor. He did not seem to have a degree in anything, which puzzled Spock a bit. Doctor of what? Doctor Who?
Nevertheless, he was pulled into a small adventure with the man and his companions. Spock wondered whether he was dreaming- a blue British Police box dating back to pre-warp Terra that could travel through time seemed much too childish and wildly unrealistic. And yet...the memories were so vivid. A familiar wheezing sound in the distance interrupted his thoughts. He turned to see nothing. A slight breeze caressed his aged face.

The five fandoms:
Lord of the Rings
Percy Jackson and the Olympians
BBC Sherlock
Attack on Titan/Shingeki no Kyonjin
Hetalia: Axis Powers

Lessee here....

Puella Magi Madoka Magica/Harry Potter


As it turns out, after the death of Voldemort, quite a few Death Eaters had escaped, spreading around the globe where they would either hide away relatively harmlessly or be hunted down by magical officials.

At the moment, one Death Eater in particular was running away from that very fate through the nighttime streets of Mitakihara City.

Alexius Rosier had once entertained very big thoughts, of rising through the ranks of the Death Eaters. After the Battle of Hogwarts, those had shrunk to surviving the aftermath of the war, biding his time. As of right now, they had become 'get away get away get away.'

In the corner of his eye, something tugged at his magical senses. He turned around in surprise as the world around him warped, the streets becoming even more shadowed yet somehow strangely lit, as massive white-robed figures rose out of nowhere.

Rosier instinctively snapped up his wand, shouting out the Killing Curse. The bolt of green light seemed to work, the creature crumpling and dissolving, but another one simply rose up to take its place, the strange creatures raising their hands as one to point at him. He barely had the time to cast a shield charm before straight bolts of light hit the shield, and almost broke it. He grimaced as the strain of holding it up began to build, and he realized with a sinking feeling that even if they stopped their barrage he'd never be able to fire off enough curses to get them all in time.

Out of nowhere, a girl with bright yellow hair, dressed in some kind of ridiculous white and brown outfit dropped out of the sky, landing next to him. "Don't worry, you're safe now," she said brightly, waving her hand. A web of ribbons wove over the top of his shield charm, easily stopping the strange bolts. With another theatrical flick, she drew strange, long white tubes out of thin air, each one firing off spheres of orange energy at the monsters.

Her attack was quickly joined by vibrant purple bolts, fired by a girl with a pair of truly enormous glowing white wings and a bow, and a girl dressed all in red with a spear carved through the targets the other two didn't get. Within minutes the creatures had been completely destroyed, with only some strange black cubes that the girls were now diligently collecting remaining.

"Well! I'm so sorry you had to get involved with this," the yellow girl said apologetically. "This is all probably very confusing to you, but it'd probably be for the best if you just went home and tried to forget about this."

Rosier stared in shock. Did the girl actually think he was some kind of (he shuddered at the thought) Muggle? And one so easily fooled as to not need a memory charm? "Listen, I don't know who you think you are, but I know more about magic than you would-"

"Stop right there!" yelled voices from the ends of the alley. Rosier grimaced as members of the Japanese versions of the Aurors (Mahou-shugo something? Something like that, anyways) brandished wands and paper charms at him.

He growled and grabbed the closest girl - the winged one. If she had a bow, she'd probably have the least close-quarters ability of any of them. He pointed his wand at her heart. "Stop or I'll kill her!" he snapped at them. "Now drop your wands and walk away."

Before any of them could obey that, the girl stomped down on his foot, harder than any teenage girl should be capable of. On reflex he fired a curse at her, swearing as he did so. Now his hostage was dead and useless and wait why was she still standing? And glaring at him?

The dark haired girl, who seemed to be quite mobile despite the curse that had very clearly hit her, stood there for a moment, before punching him into a wall. The last thing he managed to think before his vision blacked out was "I am never going to Japan again."


~~~~~

Yes, there is canon evidence of Homura being that hard to kill.


Next fandoms, hmmm

Teen Titans
Elementary
Free! (aka Swimming Anime)
Gravity Falls
Danny Phantom

If someone wanted to contribute and had a crossover idea, but someone else had already replied to the post containing the fandoms that they wanted to use, would a hypothetical Boarder then need to wait for someone else to list the same fandoms, or could they just respond to the post with their own variation, provided that it was different from one of the ideas that had already been used?