The ninjas, the mane seven, and Spike looked at the four alternate ninjas turtles. Michelangelo looked at himself and his brothers, “Dudes, we're standing on two legs this time.”
“Fascinating,” Donatello said, “I guess my portal projector must've taken our mutant DNA into account.”
“What're you guys doing here?” Twilight asked.
Leonardo answered, “We came here to warn you that certain someone-”
“Or two certain someones found a way into this dimension!” Donatello cut him off.
“And one of them begins with a "Krang" and end with a "Shredder"!” Raphael added.
“And they're up to some totally bogus stuff, dudes!” Michelangelo finished.
The turtles and their allies looked flatly at each other, until Donnie spoke up, “Yeah... you're a little late to warn us on that.”
“We already know they're here.” Raph added.
“Really?” Leonardo asked in surprise.
“Well, talk about bad timing.” Raphael grumbled.
“Beggin' your pardon, y'all?” Applejack spoke up, “But could somepony tell us why there are two sets of turtles here?”
Michelangelo noticing the girls looked happy, “Hey, Rainbooms! Good to see you again!”
“Why does everypony keep calling us the Rainbooms?” Rainbow Dash asked sounding annoyed.
“Cause that's who you are?” Raphael replied like it was obvious.
“And why are you girls looking at us like you don't know us?” Michelangelo asked.
“Because we don't.” Spike replied.
“Yeah, this is the first time we've ever seen you before.” Pinkie put in.
Michelangelo turned to the other ninjas, “Like dudes, what's up with the Rainbooms?”
“Did they get amnesia?” Leonardo asked.
Twilight spoke up, “No, Leonardo. Like I had to explain to Krang, these girls aren't the Rainbooms, they are their pony counterparts.”
“Pony counterparts, huh?” Donatello asked, “Interesting.”
“So um, who're these guys?” Fluttershy asked.
Sunset spoke up, “Girls, these are the Turtles counterparts from another dimension.”
“It's nice to meet you all. I'm Leonardo, I lead.”
“I'm Donatello, I do machines.”
“I'm Raphael, Cool but rude.”
“And I'm Michelangelo, I'm a party dude!”
Pinkie gasped, “A party dude! That's amazing!”
Rarity noticed the other turtles belt buckles, “You wear your initials on your belt buckles. Why is that?”
“So we know whose is whose.” Donatello answered.
Suddenly the doors opened up, as the Young Six entered, “Hey, Headmare Twilight, I was wondering if we could...” the students saw the other turtles and stared oddly at them.
“Uh, did I hit my head during training?' Gallus asked in confusion.
“Or are we seeing double turtles?” Smolder asked.
The ninjas could help but laugh at the dejavu, until Twilight explained, “You're not imagining things, these are the Turtles from another world.”
“Another world?” Yona asked.
Ocellus gasped, “Of course! I read about these guys too! They're the Turtles counterparts!”
Donatello spoke to his brothers, “Heh, she knows."
“But they're not very combatant ninjas.” Ocellus put in.
Raphael frowned, “Hey, bug girl, we resemble that remark!”
“Who're these kids?” Leonardo asked.
“These are some the students we're been training in the art of ninjitsu.” Leo explained.
“This is Sandbar, Gallus, Smolder, Yona, Silverstream, and Ocellus.” April introduced them.
“You're training kids to be ninjas?” Raphael asked in disbelief.
“Yeah. And they did better in their training on the first day than when we trained you knuckleheads.” Raph said to spite them, and the other turtles frowned with steam coming out of their ears.
“What're they doing here?” Sandbar asked.
“They just now apparently realized their Shredder and Krang have come to Equestria.” Karai answered.
“You guys must be really slow.” Gallus told the other turtles who were starting to get annoyed by the mocks.
“But I guess it's better now than later.” Twilight admitted.
“Why's that?” Michelangelo asked.
“I'm afraid Shredder and Krang have all the necessary components they need to open their portal to Dimension X.” Fugitoid explained in sorrow.
“What?!” the alternate turtles gasped.
Raphael groaned, “Oh, great. Which means we have to clean up the mess you posers left!” the ninjas frowned, until Fluttershy flew up to him.
“That is not a very nice thing to say to my friends.”
As Raphael saw Fluttershy's eyes gaze sternly at him, he backed away before hiding behind a couch, “Please make her stop with the staring!” Rocksteady and Bebop laughed to themselves.
“If they have all they need to open a portal to Dimension X, they'll need to bring the Technodrome to the surface.” Donatello reminded them.
“Wonder why they haven't already started?” Mikey wondered.
“Probably because of how late it is.” Pinkie guessed, “I mean even villains need their sleep, you know.”
Meanwhile at the Technodrome, Night Terror was speaking to his superiors, “Master Shredder and Master Krang, we have all we need to put the plan into motion. Why are we not initiating it now?”
“Because, you fool, it's late. And I'm tired!” Shredder answered.
“You're tired?” Dark Leo asked in outrage.
“What've you got to be tired about?” Dark Donnie asked.
“You didn't do any work today.” Dark Raph reminded him.
“Yeah.” Dark Mikey agreed.
Suddenly the Technodrome monitor was beeping, “Quiet, all of you!” Krang shushed them, “The scanner is picking up a trace of inter-dimensional energy.” he worked the monitor before pulling up on screen the ninjas, the ponies, and the alternate turtles, “Oh, no. It can't be!” Krang gasped.
“Not those blasted turtles!” Shredder complained.
“What're you talking about?" Night Terror asked in confusion.
“Them.” Krang motioned to the other turtles on the monitor.
“Another Leonardo?” Dark Leo asked in shock.
“Just what I need another Raphael.” Dark Raph growled.
“Are those the turtles from your own dimension?” Chrysalis inquired.
“Precisely. And they're just as bothersome as the ones you've faced.” Shredder warned her.
“No matter, with our forces we should be more than a match. Especially when my rock soldiers from Dimension X arrive.” Krang explained.
Dark Donnie spoke up, “Fighting our doubles is going to be near impossible, since they got those medallions! When we fought them at the gala, we didn't stand a chance!”
Chrysalis smirked, and spoke to the four dark ninjas, “Which is precisely why I have a little surprise for you four. I used some of the leftover Sombra Crystals to make something that will give you Dark Turtles the winning edge!”
“What is it?” Dark Raph asked.
Chrysalis levitated four medallions with black crystal shards in them, “Ooh! Pretty!” Dark Mikey marveled.
“Are those?” Dark Donnie asked.
Chrysalis levitated the medallions around their necks, “Yes. I have created exact copies of the Turtles' medallions. Each with the same and greater power of the original! A little something I've been working on since I first created you all.”
“Are you sure they work?” Dark Leo asked curiously.
“Perhaps you can test them out on something or rather two someones...” Chrysalis smirked, while motioning to Shredder and Krang.
The Dark Turtles grinned and tapped into their new powers, with green markings covering their bodies. Shredder noticing this spoke, “Why are you looking at us like... Uh, oh!”
“Don't you dare!” Krang warned them.
The Dark Turtles attacked them with their powers and fried them both. The two bumbling villains laid on the floor looking beaten.
Dark Leo spoke evilly, “Let's see those Turtles try and beat us now!”
“Yes, but as Shredder said it is late and we must still prepare for everything tomorrow.” Chrysalis said.
Dark Mikey yawned, “Yeah, I'm feeling sleepy anyway.”
So the Dark Turtles and Night Terror took their leave, while Shredder and Krang picked themselves up and left as well. Chrysalis walked away and through the Technodrome halls thinking about all that's happened.
“Working with those two lame brains has been nothing but a pain, but it's all going to pay off. And I will have a new army to exact revenge on all those little ponies.” she laughed.