Riku and Cody made into Gravity Fall and they saw Stan and Ford surrounded by Dream Eater
Stan: Ford, what are they!?
Ford: I don't know.
Then Riku and Cody save them
Ford: Thank you for saving me.
Riku: You're welcome. So what happens?
Stan: Thanks to Bill, he take over the town and now he wants Ford.
Riku: I see, maybe we should help you fight him.
Ford: You mean it?
Cody: We will, trust us.
Ford: Okay, let's go.
They went off and they found Bill Cipher
Bill Cipher: Hey, there Ford.
Ford: Bill, you have to stop this!
Bill: Well, let's have a fight first!
They are fighting him and he ran away
Ford: He got away!
Riku: Don't worry, our friends will stop him for sure.
Cody: They always know how to deal with them.
Stan: I see.
They left and they saw Ryalight Glimmer
Ryalight: Well. I used to be Ryan. Xehanort met me. If you and Riku join me, you will embrace the darkness to save Ryan and Sora.
Cody: Riku, Ryan, Sci-Ryan and I walk the road to dawn!
He left and they seal the Keyhole