It's Halloween and Adam learns about how animals celebrate "Howl-oween".
- Almighty Janitor: Old Joe.
- And Then John Was a Zombie Old Joe turns out to be a ghost in the end.
- Crazy Jealous Guy: Jake grows increasingly jealous of the fake parrot that's part of Adam's pirate costume, to the point he "kills" it in a fit of rage before becoming Jake's new parrot.
- Creepy Basement: Since this was a school, it was a boiler room instead of a basement or attic.
- Dead All Along: The lore of Old Joe was true, despite it just being a prank done by Pixiefrog and Warthog, and Old Joe was a ghost, still roaming the boiler room.
- Eccentric Mentor: Old Joe.
- Forgotten Phlebotinum: Jake has the ability to fly in this episode, just for a one-off gag. But imagine how useful this would be in other situations.
- Ghost Story: Old Joe tells a few of these.
- Halloween Episode: This is the Halloween themed episode of the show.
- Hook Hand: Parodied. Old Joe begins a hook hand villain scary story, before Adam and Jake say they've heard it before. He then lists several villains with the "object" "body part" formula.Old Joe: Have you heard of ... Fork Tongue?Adam/Jake: Heard it.Old Joe: Doughnut Head?Adam/Jake: Heard it.Old Joe: Can of Beans for a Brain?Adam/Jake: Heard it.
- Parodied Trope: Old Joe's tales are mostly silly versions of horror story cliches.
- Real After All: There ends up being a real ghost of Old Joe the Custodian—this in turn confirms that, at one point, CDMS was a regular human school before eventually becoming an all-animal school.
- Running Gag: People keep mistaking the shirt Adam uses as part of his pirate costume as a blouse, to the point he accidentally refers to it as one, much to his embarrassment.
- Scary Shadow Fakeout: Adam and Jake get scared off, by the shadow of a giant six legged creature, but it turns out to just be the very large shadow of James Ant.
- Terror at Make-Out Point: Old Joe starts telling a cliche horror story with this concept, before Adam and Jake stop him.Old Joe: Well, if you didn't think that was scary, try this on for size. Two teenagers are in a car at make out point...Adam/Jake: Heard it.
