Danny put the twins down on the rocky ground outside the ghost portal and changed back to human.
"Well, that worked out nicely," he said, stretching as the three of them walked out of the cavern and into the sunshine.
"I can't believe all the fuss was about Bill," Mabel said with a little laugh.
"Yeah, I thought he was our problem," Dipper replied. "Who knew ghosts were so meddlesome?"
"Uh, me!" Danny said teasingly.
They laughed and joked as they walked back towards the Shack, though Dipper noticed that Danny was rather quieter than usual.
"What's up?" Dipper asked him as they approached the end of the woods.
"Hmm?" Danny looked at him and shook his head a little. "Sorry, just thinking." He looked down, then out at the Shack that was emerging through the trees. "I mean, now that Bill is gone I don't really have any reason to stay here…"
"What?!" Both twins exclaimed.
"You're leaving?" Mabel asked.
"But we just got to know you!" Dipper said indignantly.
Danny smiled sadly. "The whole reason I came to Gravity Falls was to find out what Bill was up to and stop it. Now that he's taken care of, I kinda have to go back."
"Can't you stay here for a little longer?" Mabel pleaded.
"I'll stay at least until tomorrow. But once all the ghosts realize Bill's out of the way they'll be on the rampage again back home. It's still my job to protect Amity Park."
Dipper looked down, disappointed, but Mabel spoke up.
"Well, then I demand that you give us your number!" She said. "No way am I going to let you disappear!"
In spite of himself, Dipper snorted with laughter. "No pun intended," he added.
Danny laughed. "Fair enough. And you guys should come visit me in Amity Park sometime. You could help me fight!"
"Yeah!" Dipper said, excited.
The three of them walked back to the Shack, laughing and talking about further adventures to come, and planning a possible trip to Amity Park. Dipper grinned to himself. Gravity Falls might be chaotic, but nothing that happened in Amity Park could possibly top what happened here.
Could it?
THE END