"And you," Dipper stammered, "Are you a copy?"
"Of course," 'Wendy' answered, "The real Wendy is still having fun being wild with her friends in another part of the bubble."
"This is all a trap," Dipper screamed, "Show me what you really are."
Wendy morphed into a mass of bugs for an instant, then morphed back.
Dipper screamed in shock, and backed away.
"I've got to get out of here," Dipper yelled, "Find Mabel, and escape!"
"Too late," the false Wendy blurted out, "There's nothing to escape to anymore. Bill was trapped for a little while in Gravity Falls, but he tortured Ford until he broke and revealed how to escape. Bill played with the world until there was nothing left alive, except here in..."
Before the false Wendy could finish her sentence, her head exploded in a mass of bugs. This made the rest of the false Wendy turn into bugs and scatter away.
Then, Dipper saw, standing there, another Wendy, holding a smoking shotgun.
"What the heck was that," Dipper freaked out.
"Dipper," Wendy asked, "Is that really you?"
"Depends," Dipper demanded, "Are you really Wendy or are you another trap?"
Wendy then proceeded to knee Dipper in the nuts.
"Thank you," Dipper groaned.
"My pleasure," Wendy stated, "Now come on, we have to save the world."
"Do you think we'll be able to," Dipper asked, "This whole bubble thing has me wondering if there's even a way out and back to reality."
"Listen to me," Wendy stated, "I have seen some amazing stuff since I met you. And, I don't know if it's dumb luck or yin and yang, or whatever, but when we work together, there's, like, nothing we can't accomplish. We made it through the apocalypse, so I know we can make it back there."
"Your right," Dipper proclaimed, "We can do it."
"I already knew that," Wendy stated, "Now, come on. We've got to go kick some triangley ass."
"Let's go," Dipper replied.
"But," Wendy stopped, "Before we go, I guess you deserve to know what it's like to kiss the real Wendy."
"What," Dipper questioned.
Suddenly, Wendy crashed her lips against Dipper's and he happily reciprocated.
"Now," Wendy continued, after they broke apart, "As I was saying, let's go kick some triangley ass."
Wendy then walked out of the house, with Dipper right behind her, ready to follow her to the end of the world.
When Dipper woke up, he didn't wake up with a start. Instead, his eyes opened and he slowly took in his surroundings, still laying down.
It was almost five in the morning. He was lying in a hotel bed with his new wife, Wendy.
That was the first time Dipper had an imposter dream in years. And it was the first time a doppleganger dream had a happy ending.
And, most importantly, it was the first time Dipper smiled immediately after waking up. And he hoped this wouldn't be the last time.
"I love you, Wendy," Dipper whispered, kissing Wendy's head and going back to sleep.