Dimensional Location: Gravity Falls Universe, Earth Year 1940 AD.

"So why are you keeping us alive?" Dipper Pines asked curiously.

"We want more information about your Gravity Falls, we can't keep hiding inside the Mystery Shack forever." Mabel Gleeful explained.

"How long have we been down here?" Mabel Pines asked nervously.

"About two weeks, nobody noticed you were even missing because an Identical Mabel and Dipper were showing Uncle Stan their Summer Scrapbook." Mabel Gleeful explained pointedly.

"You used my Summer Scrapbook to Gain Uncle Stan's Trust?" Mabel Pines asked nervously.

"It's a good thing we hide our Summer Scrapbooks in the same place." Mabel Gleeful says with a sudden smirk.

"So Evil Mabel, what's the plan here?" Dipper Pines asked curiously.

"We Sold Pacifica Northwest to the Gnomes in exchange for Gold." Mabel Gleeful says with a sudden smirk.

"You did what?" Mabel Pines screamed in horror.

"We Sold Pacifica Northwest to the Gnomes in exchange for Gold." Mabel Gleeful repeated.

"What kind of monster are you?" Mabel Pines demanded.

"Don't worry, we helped Mister Northwest become the Gravity Falls Mayor to distract his Entire Family from noticing that their Returning Daughter was the New Gnome Queen too quickly." Mabel Gleeful explained.

"You Con Artists can't fool everyone forever!" Dipper Pines declared fearfully.

"You two don't see how wonderful this really is, we are you from another dimension. We have the Same DNA, Same Fingerprints. We are almost identical aside from our Family History being different here." Mabel Gleeful explained thoughtfully.

"What are you talking about?" Dipper Pines asked curiously.

"One of your Ancestors died inside Gravity Falls one hundred years ago, they just vanished inside our dimension." Mabel Gleeful explained thoughtfully.

"So your Ancestors married into the Gleeful Family?" Dipper Pines asked curiously.

"Grandma Mabel Married Gideon Gleeful, I'm Gideon's Granddaughter and Dipper's Twin Sister." Mabel Gleeful explained.

"So I Married Gideon Gleeful and your my Grandchildren?" Mabel Pines demanded in complete disbelief.

"Parallel Universe, Parallel Mabel Pines." Mabel Gleeful explained with a sudden smirk towards the Dumbfounded Mabel Pines.

"Wait, Gideon Gleeful's Grandchildren are impersonating us?" Dipper Pines asked worriedly.

"Welcome to Gravity Falls, where anything is possible." Mabel Gleeful tells them both laughingly.

"Does Gideon Gleeful know his Grandchildren are impersonating us?" Mabel Pines asked worriedly.

"We had to tell him before he figured it out himself." Mabel Gleeful explained pointedly.