Meanwhile in Ooo, Jake was cooking breakfast downstairs. "Finn, time for breakfast!" he called out. Jake set down plates for Finn and himself. BMO immediately jumped up onto the table. "Oh, everything looks delicious, Jake!" shouted BMO in joy. "BMO, you know you don't eat, right?"
"Can't you just let a computer dream?!"
"You're weird."
"What the-?! Who are you and what have you done with Cake?!" shouted a female voice. Jake and BMO turned around to see a girl dressed in an outfit similar to Finn's. "Hey, how'd you get in here, and where's Finn?!"
"I don't know who this Finn guy is, but you'd better get explaining or you'll be introduced to a world of hurt courtesy of me, Fionna the Human!"
"Oh, man, we'd better take you to Princess Bubblegum. She'll probably be able to explain what the Math is going on."
Jake immediately took Fionna to the Candy Kingdom and up to PB's castle. They burst into Bubblegum's laboratory. "PB!" shouted Jake. "Oh, hey, Jake! I was just working on-!"
"No time for that now, Finn is missing!"
"I'm sure he's just off adventuring. He'll be back soon."
"I wasn't finished. I his place, I found her!" shouted Jake pointing at Fionna. The Candy Princess looked Fionna over. "Hmm, she looks like Finn."
"Yes, thanks for that observation, but how do we get Finn back?!"
PB didn't seem to hear Jake. "Tell me, who might you be?"
"Uh, I'm Fionna the Human. You look really similar to my friend, Prince Gumball."
"Interesting, you must be from a parallel dimension!"
"You talk like him too. Gumball is always taking something 'bout science."
"Well, Fionna, I may be able to help you guys out if you could tell me a little about the dimension you came from."
"It's a lot like this one, except you're supposed to be a prince, and Jake is supposed to be a cat named Cake."
"I'll get searching. In the meantime, Jake can show you around!"
"What?! Why me?!"
"Because I need some time to figure this out, you donk!"
"Ugh, fine."