Mystery Shock!

Mystery Shock! is a 2-part episode of Phineas and Ferb/Gravity Falls.

Before Theme Song
Phineas and Ferb are riding to Washington, D.C. while Dipper is reading his book. They stop when they see him in the middle of the road. He moves out of the way but Waddles runs outside towards the car while Mabel chases him. They stop again, and Mabel realizes that their mom was Lindana and Mabel asks if they want to stay for a while. Phineas thinks somehow he knows Dipper, Dipper thinking the same thing. Phineas tells mom to say yes, so she does.

Part 1
Phineas looks around the Mystery Shack in amazement. Grunkle Stan comes in the room, and greets them as costumers. Dipper, Mabel, Phineas, and Ferb say that they are staying for a few days at the same time. Stan says they at least need to pay, and Dipper tells them not to because Stan rips people off. The Giant Floating Baby Head comes in, and Phineas tells Dipper, "Weird, right?" And Dipper replies, "I'm use to it." Phineas then sets up his video chat with Baljeet, and Buford is there too. Buford asks how they got to Washington so quickly, and he replies that they are staying in Oregon for a little bit. Buford and Baljeet come in the Mystery Shack, saying, "We are, too!" Perry goes to Major Monogram who has a puppet of a pig on his hand saying, "I am Major Monoham! Stop Dr. Doofenshmirtz before he turns Major Monogram into a squid!" A laser shows on the screen and Major Monogram comes up, with a squid body saying, "Too late." in squid, and Carl looks on Poodle Translate which says that it means too late. Perry gets in a covered wagon, and in the distance you could see a sign, and the guys say, "Doofenshmirtz Evil Inc!" And Doofenshmirtz replies, "No, guys, it's 'Doofenshmirtz Trying To Put Up A Sign That Says Questionry Place!' I got the name from a great great grandfather that has probably lived longer than Balloony will ever be!" Phineas wakes up in the middle of the night, seeing Dipper laying awake. Phineas asks why he is awake, and Dipper says, "I am in..." and he fake snores. Mabel wakes up and says, "Dipper, are you thinking about Wendy again?" and Phineas asks who Wendy is. Isabella peeks through the window, listening. Mabel says that Wendy is the red haired girl downstairs who Dipper is in love with. Phineas says that she is beautiful and that he is in love with her. Isabella starts crying. Everybody looks through the window, including Ferb, who is now awake. However, nobody is there. Isabella who was held up by the fireside girls, tells them that Phineas is in love with someone else. Phineas says, "But I think Isabella is more beautiful." This shocks Ferb, who tells Phineas about Vannesa. Ferb and Dipper high-five each other, saying that they are both in love with girls older than them. They all fall asleep again, and the house gets shocked by lightning. Phineas' body switches with Dipper's, and Ferb's body switches with Mabel's. The voices do not change. To Be Continued...