The next day, after school was over, the trio and Jazz made their way to Danny's house. The ponies and Danny's parents were waiting. They went to the lab. Maddie spoke. "First things first. The guards had no reports of Blueblood attempting to go back into Equestria. Jack and I took watch at different turns over the night, and nothing came out of the Ghost Zone. So we're led to believe that he's still somewhere in the Ghost Zone. We're going to search for him. Hopefully ghosts haven't gotten to him first."
"The Ghost Zone? Hold up, Mom, we can't just go tearing in there. It's endless. He could literally be anywhere in there. We'd never find him. Our best bet is to just see if he comes back through. He'd have to eventually to survive." Danny said.
"So what? We can't do anything?" Rainbow Dash asked, irritated. Sam nodded.
"Looks like it..."
Twilight Sparkle smiled. "Not to worry! I was just studying a new spell. It should be able to show where lifeforms are. Considering ghosts aren't exactly lifeforms, it should narrow it down."
"Well, it's certainly worth a shot. Oh, and Twilight, I finished reading the book on beginner spells you gave me. I need a new one." Jazz said. Twilight nodded.
"Oh, it's always wonderful to find a friend who loves reading as much as you do! Alright, now..." Her horn began to glow. She concentrated. "Alright, I obviously detect all of you, including Danny...but...it seems like there's something not too far away from the portal...oh goodness!" She stopped. "Brace yourselves! Speak of the pony devil, it looks like Blueblood might be trying to come back through!"
No sooner than did she speak did Blueblood begin to pull himself through the portal. He was badly battered. His clothes were torn and his hair was all over the place. Maddie and Jack immediately pulled out weapons and Danny went ghost. The rest pulled out their wrist guns. Blueblood's eyes were filled with fury.
"I...have had enough of you all...putting me through hoops." His left eye twitched involuntarily. "You've become more than a thorn in my side...I have dragged myself through the worst place possible to get back here. Without a certain map. And I shall end it!" His horn glowed. "One spell shall put you all out of commission for a week!"
"Not on my watch!" Twilight shouted. At the same time Maddie had immediately grabbed the Maddie Modulator to counteract it. Right as both spells from both unicorns were shot, both were intercepted by the modulator. Maddie had meant to just capture Blueblood's, but Twilight's had accidentally been absorbed as well.
The modulator began to shake and smoke. "EVERYPONY RUN!" Applejack shouted. "SHE'S GONNA BLOW!"
But it was too late. The modulator exploded with a loud, resonating BANG with a storm of smoke. There was coughing. But every human in the room felt strange. Their bodies began to painfully feel like it was changing rapidly, too fast for comfort. When the smoke faded, Blueblood was gone. The group moaned and groaned. Jack was the first to fully open his eyes. When he saw his hands had turned to hooves and a horn was on his head, he groaned.
"This is not good." he commented.
"What happened?" Fluttershy asked aloud. The ponies regained their bearings and turned to the rest...only to recoil in shock. The spell had changed all the humans to ponies again. On Earth, no less. "Oh..."
"What's- oh!" Everypony began to rise to their hooves awkwardly. Sam groaned.
"This is just perfect. My parents are gonna be so mad..."
"Hey, mine too!" Tucker grumbled. "I don't think they'd be too happy to see me like this again."
"We have more important things to worry about..." Maddie muttered, ruefully poking her wings. "Blueblood escaped again."
"Fabulous," Danny commented sarcastically. "Just freaking fabulous."
"How long did he say that spell was supposed to last?" Rarity asked. Jack frowned.
"A week, if I'm correct. That means my family and I, and Sam and Tucker are going to be afflicted by this. Well-"
They were cut off by frantic knocking at the door upstairs. They stared at each other in horror, and Maddie came to the door, followed by the rest. "Um, now's not a good time! Come back...eventually..." Maddie said.
"Mrs. Fenton? It's Mrs. Foley and Mr. Foley." a voice came. Tucker's eyes went wide.
"Oh, um...Mom! Dad! Uh..."
A sigh. "I take it you are suffering the same problem as well..."
Eyes went wide. "It wasn't just us?" Twilight Sparkle asked aloud.
"No! Not just you at all! Please, open the door..." Jack opened the door using his magic and outside of the door was Tucker's parents, two unicorn ponies. Behind them ponies were stumbling in the streets, trying to stand up.
There was a long silence, and then Sam gasped. "Amity Park?"
"No. Worse...it appears the entirety of Earth has fallen foul of whoever caused this...we were wondering if you might have any idea of what might've caused this, considering our children have been in that world once."
Tucker sweated. "No, not at all. We're just as confused." he lied. His parents seemed to believe it and nodded. Soon Sam's parents, struggling as they attempted to run, made their way up to the Fenton's door. Both of them were earth ponies.
"I see we're all having an issue." Sam's father commented dryly. Mrs. Foley looked to them.
"It looks like the Fentons had nothing to do with this. They're just as confused."
"That can't be good...but when the world gets turned into ponies, nothing can be good..." Mrs. Manson said. "Anyhow, Mayor Masters has declared an emergency town meeting. You may wish to speak with him on the way to solve this. Come with us!" They said urgently. The group followed nervously. Jack didn't look pleased at all that he had to go listen to Vlad. The ponies from Equestria did their best to look like they were just as confused as the others- previously human- and forced a fake stumble in their step.
Blueblood had been hiding in Danny's room. When he saw them leave, he smirked and was about to walk out when a laptop caught his eye. It had already been logged into- probably by Danny's parents- and ghost files lay open for him. He scrolled through it curiously. He froze when he got to one that said 'half-ghost'. He popped it open and Vlad Masters came on-screen.
He read it for a few moments, learning about the arch enemy of his enemy before grinning maliciously. "The enemy of my enemy is my friend..." he said to himself before concentrating and teleporting himself. No one would notice him on Earth, except for a certain group he would avoid.