Just the lines where they know each other and are teaming up for the first time really leans on the theory that they're animated actors (à la Who Framed Roger Rabbit and Looney Tunes: Back in Action).
1:53 🎵Adventure Time. Come on grab your Friends and go to very..Distant Lands With Jake the dog and Finn the Human the fun that never ends *Garnet finishes* It’s Adventure Time!🎵