AN: The following is the scene played in the top half of the screen as the credits roll at the end of both shows.

It was early the next morning when Major Monogram spoke through the screen of Ford's study to Stan, Ford, and Perry.

"…So," he was saying, "Using the Blind Eye device, Agent P will wipe the memory of Agents W and G from your minds, effectively negating their existence in this entire canon. Of course, if it turns out their existence as OWCA Agents doesn't contradict anything, I don't see any reason for that not to be canon, am I right?"

"Sir, you're doing it again…" whined Carl from off screen.

"Exposition is my job, Carl!"

Meanwhile, outside, the children were all saying goodbye to one another. Dipper, Mabel, Phineas and Ferb parted from a group hug.

"Bye Ferb," giggled Mabel, as Ferb winked back at her.

"Bye guys, enjoy the rest of your summer! And remember, like the song said, keep in touch!" Phineas said, waving as he walked towards the car, passing by Wendy and Candace exchanging phone numbers.

"Bye Phineas, bye Ferb!" Dipper waved back.

Mabel and Isabella hugged and shared some whispers, most likely about romantic stuff Dipper thought, before Isabella too got into the car.

"Hey, where is Perry?" asked Baljeet, before seeing Perry climb out from under the Shack. "Oh, there he is."

As Buford said Goodbye to Soos with an unbelievably complex full body handshake, Perry winked at Waddles and Gompers.

Soon the Flynn-Fletcher car was all loaded up, with family, close friends, and luggage (even some souvenirs from the Shack, like the new Pine Tree hat Phineas was wearing, or the Moon and Star Fez and eyepatch set that Ferb was wearing). The rest of the Danville crew had flown back the night before, earning the Fireside Girls what Buford called the "Sake of plot convenience" patch. David had decided to take to the roads as a hitchhiker, see the world, and employ the philosophy Carpe Diem from now on.

As everyone said and waved goodbye, Mabel caught Dipper humming "Keep in Touch", and swiftly elbowed him in the ribs.

"What?" he coughed, "it's catchy!"

As the little red car drove away, Phineas exclaimed, "Wow, what a great place, huh? I can't wait to come back."

Everyone agreed.

"Yup."

"Ditto."

"Agreed."

"Well, that might be inconvenient, from a plot perspective…" shrugged Buford.

"So where to now, Dad?"

"Well boys, we're off to Jeffsville in the Quad-state Area for the weekend, to spend time with Aunt Tiana and Uncle Bob at their new place. After that, your friends are flying home, and we'll be renting an RV for our traditional Family Road Trip! Does that sound Ok to you?"

From far outside the car, everyone heard a snap and a man call out "Ok!" from the distance.

"Wow," said Phineas, "I hope we see a good old fashioned Truck Stop!"

"My fanboy sense is tingling!" said Baljeet.

Back at the Shack, Ford was studying the rift he had contained.

"I can't hold onto it forever like this, Bill is only getting stronger by the minute… No, I've got to seal it. I must find out how! Perhaps an adhesive of some kind… I must get right on this…"

Outside the Shack, Stan greeted the kids.

"So, what do you two want to do today?" he asked.

"Well," Mabel suggested, "maybe we could go on a road trip?"

Stan turned that thought over in his head.

"Hmmm," he said to himself, "it is close to prank season…"

Meanwhile, Dipper sat on the steps, scratching his chin.

"I feel like we're forgetting something…"

What Dipper did not see, however, was Doofenshmirtz stumbling around the other side of the Shack, being attacked by gnomes.

"Oh, you guys again, what does a guy have to do around here to avoid being ironic comic relieeeeeeeeee!"

Doof was tripped by the Gnomes and toppled over into the bottomless pit. After him, Steve called down, "Bewege dich nicht!" which meant "don't move" in Drusselsteinien.

He fell ever downward, screaming for about fifteen minutes straight, until he opened his eyes and realized he wasn't alone. Falling next to him was Irving, looking rather excited.

"So, you wanna hear my new fan fiction?" asked Irving.

Doof sighed. "Eh, might as well."

THE END

(cue Phineas and Ferb ending guitar noise)

AN: Well, that's it. That's "Phineas and Ferb go to Gravity Falls". I had a plan from the beginning, and I feel I've accomplished all I've set out to do. I've tried to create a crossover in its purist form, and I think to the best of my ability I've done so. Additionally, I've led into episodes of both shows and explained certain elements to maintain continuity. Thank you all for being here, for reading, favoriting, and most of all reviewing. A few closing thoughts: There's something to be said about a crossover between these two shows in particular. They work better together than any other shows I've seen, making Jimmy Timmy Power Hour look like Family Guy meets Dora (let's pray that never happens). Hence, I feel a simple, pure crossover like this had to be made. That's why I engineered this story as an hour long Phineas and Ferb special that crossed over with Gravity Falls— that's how it's meant to be. This is why, secondly, I've reached the conclusion that I won't be writing "Gravity Falls: Across the Second Dimension", at least not for the foreseeable future. If and only if I get an immense number of requests, I may reconsider, but the fact is I feel I've accomplished all I want with this story. Third, I would love to see one of my readers perform and record one of my musical numbers here (it's have to be a matching original tune), and send it to me or post it on YouTube. Who knows, if that happened I might write the sequel and dedicate it to that person. ;) Finally, in keeping of Gravity Falls tradition, I'll leave you with a code. The key to decipher it lies in something that Doofenshmirtz said in the story. It's been an amazing experience writing this for you guys, and to make one final reference, Thank you for coming along!

QGLR;A RGW OTELNUS IB RGW VLXJ ID RGW IBW

L SIKKLE VUKK~