In the Neitherworld, Lydia and Beetlejuice got the Finishing Charm from Clockwork and were about to leave, Lydia looked at Clockwork as she said, "Thank you, Clockwork."
"No problem." Clockwork said. "Oh, and be wary, because someday, you will need something when the dark one arrives."
"O...kay." Lydia said, confused.
"Alright, Lyds, Let's go!" Beetlejuice said.
"Are we going? Because we need to get out of here, NOW!" Lydia #2 said, pointing outside.
"Why?" Lydia asks.
The 2 look outside to see hundreds of countless Lydia clones all either chatting with each other or arguing with each other.
"Deadly-vu!" Lydia said, nervously.
"I know!" Beetlejuice said. "Multip-lydsation, you know i'm now terrified by it!"
That night in Lydia's room, all the Lydias were struggling to get comfy due to the fact they were basically stacked in there like socks, just then, they were all sprayed by something, and they suddenly felt different.
"That will stop the process," Lydia said, holding a different bottle full of the finishing charm. "Now that's done, we better get some rest."
"Well, we saved some dinner for you." A Lydia said.
"No thank you, I think I'll turn in for the night, school is going to be long. And since we're gonna be here for a while, we'll have to take turns..." Lydia said, going into the sheets.
"Speaking of which, if Claire saw this many of us," A Lydia said, curious.
"ABSOLUTELY NOT!" Lydia shouted. "The principal can't find out either. Even Claire would've never want me to get expelled, after all, everyone has standards."
"But wouldn't be satisfying to see the look on her face?!" A Lydia said, curious.
"Well..." Lydia said, giving thought.
The Next day at school, Lydia was getting her things, her day was a little unusual, it started off with a funeral for a hero that sacrificed everything to save a city from a hulking monster which was projected in an assembly in the School Auditorium.
Next up was PE Class, the last class of the day, and Lydia was heading towards her locker and she puts her book bag in there, only to see 2 Lydias in the Locker, much to her surprise.
"What are you doing here?!" Lydia snapped.
"We're here to frighten Claire, right?" Both Lydias said, shrugging as they got out of the Locker.
"Didn't I just say no last night?"
"Not to us, we were getting a drink of water." One of the Lydias replied.
"We got the others in the Library." A Lydia sighed.
In the halls, Claire Brewster was heading into the Library and got ready for another Tweet that she'll try to get posted about the last day of School, when suddenly, she bumped into Lydia.
"Oh, great, what are you doing here?" Claire said.
"I just wanted to say hello to you, what's wrong with that?" Lydia chuckled.
"Whatever." Claire scoffs as she enters the Library, only to see dozens of Lydias in there as the smirked mischeviously to Claire.
"Hi Claire!" All the Lydia clones said.
"GADZOOKS!" Claire said, shocked. "How can you be here and here?!"
"As I told a few friends, Claire, I, myself am, strange and unusual." Lydia chuckled darkly.
"Stay back!" Claire said, nervously.
"Why?" Lydia chuckled, tauntingly. "I'm just hanging out with my siblings."
Claire shrieked in terror as she ran off, prompting a classmate to shout, "Hey, Geekbait! No runnin' in the hall!"
All the Lydias laughed as she ran off. The real Lydia arrives and looks irritated.
"Guys! What did I just say?!" Lydia said, incredulously. "I told you not to take part in this last night!"
"It's just a joke, Lydia, don't forget, we're all you, both mentally and physically." A Lydia shrugged. "And we're like siblings."
"Still, that was way too far!" Lydia scolded them. "Didn't I say that my vengeance will be artistic, and not personal?"
"I say it wasn't personal..."
"Whatever, we'll deal with that later. I'm running late for Gym Class."
In Clockwork's lair, Beetlejuice was thanking Clockwork for giving the charm to him.
"Hey, Clockie," Beetlejuice said. "Thanks again."
"No need." Clockwork said. "I'm sure you'll grow accustomed to the effects once they become permanent."
"WHAT?!"
"Yep. By the end of the day, the spell is irreversible."
"Whoa. I'm not sure if I could handle that many of Lydia. Maybe I'll see if Barbara and Adam will take them in."
"You're still in touch with the Maitlands?"
"They're in the Neitherworld, they don't talk to me. But it's worth a shot, I bet by now, Lydia is getting irritated by her clones."
After School, Lydia and her clones entered the room via backyard window, after 2 Lydias looked around, they nodded, and the room filled up with Lydias.
"Alright, coast is clear." The 2 Lydias said.
"Though I know I should be wary," A Lydia said.
"Still, I venture someplace scary..." Another Lydia said.
"Ghostly Hauntings, We turn loose!" 2 Lydias said.
"BEETLEJUICE, BEETLEJUICE, BEETLEJUICE!" All the Lydias chanted, loudly. Suddenly, the room turned into a neitherworld like dungeon as all the Lydias had their outfits turned into their Neitherworld outfits.
"Babes!" Beetlejuice said, in a rush. "We gotta talk, my brunette gothic friend."
"Beetlejuice?" Lydia asks.
"Lyds, this effect is permanent! You have at least thousands of sisters!" Beetlejuice said, alarmed.
"You mean this will stay permanent?!" Lydia said, shocked.
"Yup! How will Delia and Charles cope with this?" Beetlejuice said, overly dramatic.
"Beetlejuice! You cannot tell anyone, and if they did, Mom and Dad would never trust me with you!" 2 Lydias said
"Geez, you must know how Rick and Morty feel." Beej rolled his eyes as he grabbed the U2 formula.
"Beetlejuice, the last thing we need is more clones!" Lydia said, annoyed.
"I'm getting rid of this thing, to make sure that this thing doesn't give anyone Double Trouble ever again!" Beetlejuice said, throwing his U2 formula through a portal. "I've been trying to talk to Barbara and Adam, but they still won't speak to me."
"Beetlejuice, you did nearly force me to marry you, and they didn't take it well. They'd probably be furious that I'm somehow getting along with someone like you." Lydia sighed.
"Exactly, not to mention you pulled out Adam's teeth and sent Barbara to the Sandworms." Another Lydia said, looking for a book to read.
"I saved them from being exorcised, didn't I?" Beetlejuice shrugged.
"That's not the point. Someone else should talk to them," One of the Lydias said. "In the meantime, one of us will have to stay with Mom and Dad."
"The original babysits the copies back in the real world, a clone talks to the Maitlands." Lydia said, with her clones agreeing.
"Beetlejuice, Beetlejuice, Beetlejuice!" Lydia and her clones said, going back into the real world, leaving a clone behind.
"Alright, now to head towards the Maitlands and get this over with." Beetlejuice sighed. He doesn't want to do this, but for Lydia's sake, he has to do this for her.
Speaking of duplicates, Claire Brewster was storming home, shocked by what has happened.
"How, like, How did this happen?!" Claire said, annoyed. "How are there this many Lydias?! Why is she one step ahead of me, all the time?! Now, she has all these twins?! I'd sell anything for, like, this!"
Suddenly, on her front lawn, she saw a bottle, a very familiar bottle.