They take off in the Party Wagon, but Hun sees them and roars, surrounded by all of the defeated mutants.
"So, I still don't get it. Which Shredder is back? Doin' what? To who?" Casey asks in confusion, the girls facepalming.
"What I want to know is...how did we survive the Shredder's centrifugal scanning process? We should've been broken down into nonexistence. And how did Lia survive having her life source taken away? No offense," Donnie shrinks down slightly from Leo's look. "Something didn't go according to his plan."
"Then he won't expecting us to go after him," Leo says in realization before turning to Amy. "But...I'd like to know how you're still alive too. We...we thought we lost you..."
"Is she a ghost?" Mikey pokes Amy and she slaps his finger away.
"I'm still breathing, so therefore, I'm not a ghost. And...the Shredder didn't account for my safety measures. You see, when the Utroms gave me my powers, they also gave me a back-up life generator if you wanna call it that. So when my life source was drained..."
"The generator kicked in. Brilliant!" Donnie realizes. Amy smiles slightly at him, nodding.
"That would've been nice to know," Mikey grumbles.
"I don't really know how to describe it. And I never told you because it was something only I knew about and understood," Amy crosses her arms.
"So...we know that April and Casey exist in this dimension, but who are you?" Leonardo points to Lily, Melina, and Ann.
"What?" Ann scoffs, "How can you not know us?"
"Well, to put it bluntly, we're their girlfriends," Lily gestures to Mikey.
"Girlfriends?!" Donatello, Michelangelo, and Raphael exclaim in shock, Amy shaking her head at them.
"At least they're human," She comments, crossing their arms.
"We need to head to the source dimension, to what the Shredder called Turtle Prime," Leo goes back to the matter at hand, not that he wasn't happy that Amy was okay.
"But Leo, you saw Shredder's slide show," Mikey points out. "The turtle-verse is, like, ginormous!"
"We have no way of knowing which dimension Turtle Prime is. We'd just be guessing," Donnie says dejectedly, to the dismay of the others.
"Or..." Donatello holds up the portal stick. "We could track your Shredder's exact movements instead. When the Technodrome phases through trans-dimensional barriers, it leaves a trail of particle emissions that, with the right equipment, we can recalibrate the portal stick to track!"
"Portal stick?" Lily asks Melina in confusion, who shrugs helplessly. Raph suddenly presses the brakes, skidding the Party Wagon to an abrupt stop. Everyone in the back crashes into each other as Raph gasps.
"What the shell, Raph?" Mikey demands.
"End of the road, bros and sis!" Raph looks shocked. "Literally!" Something is engulfing their world, turning into black and white, and then blue. The citizens run away, but are immediately caught in it...before they disappear.
"It's like the whole world is being erased!" Casey and the girls back up.
"It's the Shredder, it has to be. He's reached Turtle Prime," Leo deduces.
"Then we'd better recalibrate your tracking device. You said you needed some equipment?" April asks.
"Better equipment?" Ann glances at the Party Wagon.
"All our gear was destroyed along with our lair, but I think I know a place that just might have the tech we need," Donnie explains and they take off into a run. "Come on!"
They arrive at a skyscraper that has a view of the moon. It was better known as a headquarters to a gang they knew too well.
"Purple Dragon headquarters," Donatello says as he sees the symbol. "Nice call, Mr. Wizard." The place is empty, for some reason.
Donnie takes something from the shelves. "I figured the Purple Dragons would still have the goods from that robbery they pulled."
"Yeah," Raph steps up to him. "Without Hun, the Dragons ain't too swift."
"When were they swift?" Amy retorts, snorting at the thought that the Purple Dragons are an actual threat.
Leo walks up to Amy and whispers, "Ames...is the baby..."
"Huh? Oh yeah, baby's fine," Amy waves it off. "Donnie checked me out a little while ago. I'm okay."
He sighs in sweet relief.
Raphael eyes the shelves until he sees the mutated fly from when he and his family were captured. It's trapped in a jar and Raphael gulps at it. "Step on it, home slices. This place bugs me out." He moves forward, and sees a part of a white shirt and turtle shell. He gasps as he sees Hun in front of him.
"Yes. Mutation. It's a real horror show."
The others turn around as Raphael is thrown across the room. He lands against the door, the girls and Casey gasping.
"I don't know how you escaped the Shredder," the lights turn on, revealing himself and the Purple Dragons, "And I don't care. You're all mine now."
"Hun," Raph growls at him.
"Hun?" The girls and Casey ask in shock and confusion.
"Hun," Leo confirms as they pull out their weapons.
"Do you know the thing I hate most in all the world? Turtles and ice freaks!" He charges forward, the Purple Dragons opening fire on all of them. They move out of the way, Hun hitting the floor instead. Raph ducks from the lasers and leaps into the air, kicking one thug before doing a spin kick. He grabs one PD, throwing him to the ground. Another grabs him from behind, but Leonardo pulls his goggles over his face, blinding the thug. Raph kicks him into two others. Mikey glances at Raphael with a smile before they both kick two PDs. Mikey throws Raphael in the air.
"Alley-oop!" He ducks as Mikey kicks another one away. Donatello lifts him up in the air with his staff before throwing him onto the ground. He sees Michelangelo with Hun.
"I look in the mirror, all I see is you!" He slams his fists onto the ground before punching Michelangelo. "And I hate you even more!"
"Hun," Donnie runs up to him, "You don't understand." Hun doesn't listen, punching Donatello. "The Shredder, he-" Donatello is knocked into him.
"Forget the Shredder. You're gonna pay for what you've done to me!" He holds up Donnie's bag of weapons.
Raphael glances at the fourth wall. "Some people just can't handle change."
Amelia looks at it too. "Not that his is a good thing."
Hun gives the fourth wall a weird look, trying to figure out what exactly it is. He grabs Raphael and Amelia in anger. "Why do you keep doing that? Who are you talking to? There's no one there!"
Raph hangs onto him from behind. "You idiot! There ain't gonna be anybody anywhere soon. Look!" He makes Hun look at their surroundings, which is starting to be erased as well. Both Mikeys kick two PDs to the wall and they disappear. Leo and Amy are battling two sword wielding PDs. Leo grabs Amy's waist from behind and throws her into the two. She kicks them to the erased wall and they're gone.
Hun looks in shock before throwing both Raphs off him. "The whole world is going bye bye, dude! Pretty soon you'll be going too."
"No..." Hun stares at it.
"We need your gear to track him, Hun—to stop him," Donnie elaborates and Hun realizes how serious the situation is. He attempts to run away, but is caught in the eraser.
"Hurry! Take it!" He throws the bag and Amy catches it. "Stop him! Stop the Shredder before he-" he screams as he disappears completely.
"You heard the man," Leo glances at the others. "Let's go stop the Shredder." He sees Amy carrying the bag and takes it from her. "Whoa, Ames, hold on. You need to be careful with stuff like this."
"I'm pregnant, I'm not helpless," she narrows her eyes in annoyance.
"Wait, what?!" The girls and Casey exclaim.
"Not the time," Amelia points to the white approaching them. They run out of the Purple Dragon lair.