Author's Note: *checks right and left that the course is clear, and drops off this crossover nobody asked for before running away with mad cackles*


Prologue


Rise verse

It was a nice relaxing evening for the four turtles living in the sewers of New York City. Granted, hundredth of oozesquitoes had spread throughout the city and were biting and infecting more or less innocent humans, but Raph, Donnie, Leo and Mikey needed a break from chasing them.

And what better way than a skateboarding night to do that?

Each turtle in turn slid down the ramp at full speed, displaying the extent of their amazing talent. Donnie was leading the score as the fastest of them all, and dismissed all accusations of cheating with a wave of his hand. Of course he hadn't hidden tech inside his skateboard's wheels. He would never.

"If Donnie's cheating, I'm going to cheat too," Leo announced, and he took his mystic sword from nowhere with a grin too big to be unplanned for.

Raph cleared his throat with a concerned expression. "Are you sure it's a good idea, Leo? It's not that I don't like the tundra or the ice floe or even the moon…"

"Although breathing wasn't easy on the moon," Mikey said, raising a finger to emphasize his words of wisdom.

"Relax, Raph, it's going to work!" Leo shook his bandana tail in a fair imitation of a top model on the beach.

"The odds are against it," Donnie pointed out without even bothering to raise his painted eyebrows. "Considering the 892 previous times it didn't work, your probability of success is…"

"Prepare to eat your words, my dear brother." Leo jumped to the start of the ramp. "Wait for it! Waiiit for it!"

Donnie yawned and Raph facepalmed. Mikey, however, leaned forward in curiosity. Maybe this time his brother would get it right?

"Now!" Leo rushed forward and raised his sword. He waved it as fast as he could, but the wretched thing didn't make the slightest portal.

And as his twirls had unbalanced him, he landed against the hard, cold wall.

"Told you so," Donnie said, unfazed.

But Leo wasn't going to admit defeat. Not now, not ever.

"I'll try again! It requires some minor adjustments, and…"

"Leo, it's my turn!" Mikey protested, jumping to his feet.

"Just another try!"

Mikey took his most compassionate expression as he jumped to the top floor. "Leo, you had your moment and if you only wait a little while, you'll have another one. Now it's my turn."

"We can do it together," Leo offered.

Mikey considered it. "Deal."

"Mikey, you're way too nice," Donnie commented from below.

This time, when both Leo and Mikey rushed forward on their skateboards, Leo felt the familiar tingling of mystical energy ready to be unleashed.

"Oh yeah, baby!" he shouted to the beautiful portal that was opening in front of Mikey and him. Now to direct its end on the other side of the ramp and teach his brothers a lesson…

Raph and Donnie watched with interest as Leo and Mikey disappeared through the portal.

A portal which closed and never reappeared.

They waited for thirty excruciating seconds before exchanging a glance.

"Do you think we should panic?" Raph asked.

Donnie shook his head. "Nah. They'll come back in a minute and Mikey will be all happy he hugged a penguin."

"I hope you're right." Raph wrung his hands. If Donnie wasn't, he might have to come up with a plan to rescue his brothers - a daunting perspective.


2003 verse

Hidden in the shadows of a warehouse's ceiling, four turtles were watching the Purple Dragons moving boxes below.

"Remember, guys, we want to know what they're up to," said the leader in blue. "Stealth only."

"We know, Leo," his red-masked brother answered. "Although I keep thinking that my plan was better. Punching these guys in the face until they tell us everything."

"And that's why you're not the plan guy," the amused voice of a turtle carrying a bō staff said.

"Uh, guys, what's that?" the fourth one asked suddenly, pointing at a blue light in front of them.

"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHH!" the blue light shouted, and two shapes came out of it, one waving something that looked very much like a sword.

Donatello leaned forward, extremely interested. "It looks like a portal of some sort," he said. "That's fascinating."

The mysterious sword drew a blue oval in the air, and for a second it looked like the shape attached to it and the shape attached to the shape attached to it - that one was screaming the loudest - would go through it.

But they missed the portal and it vanished as they landed amongst the baffled Purple Dragons. In the confusion that ensued, the sword was thrown in the air - and it drew a new oval, just next to Leonardo and Michelangelo.

Both of them disappeared from their brothers' view.

"What the shell?" Raphael shouted as he ran to the place where the portal had stood - but from Leonardo and Michelangelo there was no trace.

"Heeeeeeelp!" someone shouted right back from down below. "Heeeeeeeeelp!"

Donatello unsheathed his bō staff. "First things first," he whispered. "Raph? Are you with me?"

"You bet I am," Raphael said through gritted teeth. "First we beat the Purple Dragons, and next I'll have a nice little explanation with those new guys."

He cracked his knuckles and jumped right into the fight.


Rise verse

Raph watched with relief the familiar light of a transdimensional portal coming to life. "See?" he said to Donnie happily, as if Donnie had asked him anything. "They're back!"

Two shapes landed on the ground in a cloud of dust. When they picked themselves up, Raph's bright smile vanished.

The two individuals in front of them were admittedly turtles, but they were not his brothers.

"Wow," Donnie said, showing interest for the first time. "Leo really messed up this time."