A witch pranks two policemen in a helicopter by scaring them, but then her cat Twinkie falls off the broomstick. It lands on a pizza Slimer ordered, then both enter the firehouse. They run (Twinkie) and fly (Slimer) past Ray, who's working on the car, and Egon, who's doing chemistry, causing both men to get startled and make messes (Ray rips his jumpsuit and Egon's experiment is wrecked).
Louis and Ray enter and Slimer apologise, then wishes out loud that Twinkie hadn't caused the messes. The messes then vanish, so Egon scans Twinkie and determines it's a witch's familiar. Louis tries wishing for a billion dollars, but it doesn't work, and Egon and Ray explain familiars can't grant humans' wishes; only those of ghosts and other supernatural beings. Egon and Ray make a bed for Twinkie, while the witch tries searching for it.
Twinkie then escapes its bed and falls asleep on Slimer. Louis, who is staying the night at the firehouse, gets out of bed for a snack, and then when Slimer dreams of anthropomorphic food, Twinkie starts bringing his dreams to life in its sleep. Thus, the food in the fridge comes to life and bothers Louis. Egon tries to do the experiment again, but is stopped by Louis screaming. He enters the kitchen to find the anthropomorphic food tying Louis up and trying to feed him. Egon realises that Twinkie is bringing Slimer's dreams to life, and then when he sleep-talks about a new toy, the fridge turns into a toy robot.
They fight off the food and run into the bedroom, where a bunch of Christmas paraphernalia shows up due to another of Slimer's dreams. The witch shows up, and so does a Santa, who Egon makes go away by saying he wants that for Christmas. The witch takes Twinkie, but just before they leave, Slimer makes one last wish: a giant sub sandwich.
This episode provides examples of
- Alliterative Title: Kitty-Cornered.
- All Witches Have Cats: The witch has a black and white cat as her familiar.
- Ambiguous Gender: It's never revealed if Twinkie is a male or a female cat.
- Anthropomorphic Food: Slimer dreams about living food, then Twinkie brings the food to life.
- Batman Gambit: Egon makes Santa disappear by saying he wants him to go away as his Christmas present.
- Cats Are Magic: Twinkie can grant the wishes of supernatural beings and aids a witch's magic.
- Christmas in July: Twinkie makes Christmas come early due to Slimer dreaming it was Christmas.
- Comedic Underwear Exposure: Ray rips his jumpsuit, exposing his underwear.
- The Compliance Game: The "here comes the airplane" game is parodied when an anthropomorphic piece of food says, "Open wide, here comes the airplane!" to Louis when trying to force-feed him.
- Dark Is Not Evil: The witch dresses in red and black, and her laugh resembles an Evil Laugh, but she's not evil, just mischievous.
- A Day in the Limelight: Downplayed, but Louis and Slimer both get more focus than usual.
- Diegetic Soundtrack Use: Ray hums the theme tune.
- Does Not Like Spam: Louis admits to hating beets.
- Dream Episode: The episode focuses on Slimer's dreams coming to life due to a magical cat.
- Dreaming of a White Christmas: A literal example — it snows when Slimer's Christmas dream manifests.
- Easter Bunny: When the witch shows up, Louis says, "First Christmas, now Halloween?! What's next, the Easter Bunny!?".
- Edible Theme Naming: Twinkies are a confection.
- Food Fight: Parodied — the talking food starts throwing itself at Egon, Ray, and Louis, all the while yelling, "Food fight!".
- Force Feeding: The living food tries to force itself down Louis's throat, even tying him to a chair.
- Giant Food: The final wish is for a giant sub sandwich.
- Goofy Print Underwear: Ray wears sky blue boxers with Ghostbusters logos.
- Instantly Proven Wrong: One cop says that the witch was just a coffee-induced hallucination, right before she shows up.
- Last-Second Joke Problem: Twinkie is back, the witch is out of the guys' hair, and most of the wishes are gone, yet they still have to deal with the giant sandwich that was the last wish.
- Let's Meet the Meat: Exaggerated — when Louis reveals he doesn't want to eat the walking food, it gets angry and tries to force him to eat it.
- Musical Chores: Egon sings to himself while working in the lab.
- No Antagonist: The closest thing this episode has to an antagonist is Twinkie, and it doesn't count as an antagonist as it didn't realise the wish-granting would inconvenience the men.
- No Name Given: The witch is unnamed.
- Not So Stoic: Egon visibly startles when Twinkie scares him.
- Percussive Therapy: The witch kicks her cauldron in frustration at her spell not working.
- Power Incontinence: The witch becomes less good at spells without her familiar.
- Santa Claus: Slimer's Christmas dream involves Santa showing up. He disappears when he asks Egon what he wants for Christmas, and Egon asks him to go away.
- Say My Name:
- The witch yells Twinkie's name when it falls.
- The guys yell Slimer's name when he makes the messes.
- Shout-Out: When Slimer's Christmas dream comes to life and includes snow, Ray says, "I think he's dreaming of a white Christmas". "Dreaming of a White Christmas" is the title of a song.
- Speak in Unison: Egon and Louis say, "Christmas!" in unison when realising that's something Slimer likes and therefore is what he was dreaming about.
- Talking in Your Sleep: Before the fridge turns into a toy, Slimer sleep-talks about a new toy.
- Telepathy:
- Twinkie can read Slimer's dreams.
- The Santa manifestation knows Egon's name without being introduced.
- Tropey, Come Home: A witch drops her cat and spends the episode searching for it.
- Unwitting Instigator of Doom: Neither Slimer nor Twinkie are aware they're causing most of the chaos, since they're asleep.
- Water Guns and Balloons: The fridge-turned-toy-robot throws Egon, Ray, and Louis water guns shaped like proton packs.
