While Mina is away for the weekend, a depressed Bunnicula turns invisible after eating a very dry, rotten yam.
Chester thinks Bunnicula is a robot made by aliens.
When Patches decides to move in with Bunnicula and Harold, Chester knows that letting Mina's dad know about Patches' Were-Dude curse could be a problem.
Harold must teach Chester how to be a 'secret service' animal if they are to rescue Bunnicula from some chipmunks, who have trapped him in their tree.
A flooded basement means trouble for Bunnicula and the others when a Cellarmander eats them one by one. Together, Harold, Chester, Patches, and the Mumkey must rescue Bunnicula when he is eaten.
Bunnicula and the others traverse the sewers to retrieve Bunnicula's eye, but sewer mermaids won't make it easy.
Mina and Marsha search the city for Bunnicula, who is having a party, so Harold and Chester try to locate him before Mina does.
Bunnicula eats a mystical mandrake root and takes the size of a human.
Bunnicula helps a family of rabbits deal with a belligerent horse, who eats the rabbits of their carrots.
When Chester and the other Orlock apartment cats are trapped in a mysterious dimension by a human-hating ghost cat, Bunnicula and Harold must to rescue him.
Bunnicula's been framed for the crime of eating all the food in the fridge, so it's up to Chester and Harold to brush up on their detective skills and prove Bunnicula's innocence.
Harold wants to prove that he can be responsible when he takes Cerberus' place as gatekeeper of the underworld, but...it doesn't go too well.
Bunnicula accidentally erases Scott's memory after the latter finds out about Bunnicula's secret, but also becomes rather intelligent. Chester and Harold use this to take advantage of Scott and make him cater to their every whim, but this also makes Mina miss the old Scott.
A Government Agent searches Orlock Apartments for supernatural activity in order to save his job.
The pets find a magical locket that shows them the future, and they also learn that Mina will be in mortal danger when she becomes an adult. So, they decide to train her to be ready for any possible dangers to keep her safe.
The locket repairs itself and two ogres (John DiMaggio and Kevin Michael Richardson) decide to use it to capture Mina. Now, it's up to Bunnicula to save the future.
Chester and Bunnicula discover Harold is the king from a world entirely made of candy. Now they have to face its former king: The Gingerdread Man.
When Fluffy the Vampire Pointer returns with a cold it's up to Harold and Bunnicula to stand in for her when a Vampire-Dog dares to challenge her.
On a school field trip to the Nautral History Museum, Bunnicula drains an ancient plant and his 'lizard brain' starts to take over.
It's Easter, and when Bunnicula becomes chocolate after draining a cocoa bean, what will become of him when he is targeted by chocoholic children?
Bunnicula absorbs some catnip and becomes an evil cat with the urge of destroying everything. It's up to Chester and the other cats to turn Bunnicula back to normal.
Bunnicula absorbs a seaweed and gets transformed into a Godzilla-like creature whom a village of squirrels is scared of.
Bunnicula must travel into the world of text messaging to save an embarrassing message that Mina sent to Scott.
Madame Polodouri, thinking Chester is a Vampire Cat, kidnaps and exploits him along with three other animals.
Bunnicula (with Lugosi’s special blend of beans used as a temporary sunblock) has an adventure at the beachside.
After Bunnicula consumes a cabbage, he's shot into space and must find a way to make it back to Earth.
When Count Orlock (The Original Vampire of the Orlock Apartment) returns to take control of Bunnicula and rule the world, Chester and Harold must do everything to stop him.
When Bunnicula, Chester and Harold have vampire-dance-party, Prism-clad guardians take them to a vampire prison where other vampires both human and animal vampires alike are held.
When Bunnicula attempts to eat an apple as his first time to consume a fruit instead of a vegetable, he accidentally consumes a fly who lived inside the apple with a group of fruit flies and as a result he starts turning into a Vampire Rabbit/Fly hybrid.
In this flashback episode, we learn how Bunnicula helped Jean Lafitte defeat the British with their magical locket.
After Bunnicula, Chester and Harold escape an old Fairy Tale book, they accidentally bring with them the Wicked Queen from Snow White.
While playing with Bunnicula in the cellar, the pets accidentally release a bird monster that can literally steal sounds out of the air. Unable to make a sound, the pets must stop the monster before it silences the world!
Bunnicula must help the rabbit family defeat a ghost rat in a game of mini golf.
Patches uses a magical pen to bring his stories to life, but it endangers the town.
Bunnicula sucks a vegetable that had been burned by an iron pot, causing his body to become metallic (apart from that it can attract metal objects like a magnet).