[[caption-width-right:214: Top row: Quagmire, Magellan, Bogge, Middle row: Mr. Knack, Eureeka, Batly, Bottom row: Emma, Cooey, Webster]]

''Eureeka's Castle'' was a children's show that aired on Nick Jr. from 1989 to 1995 created by Creator/RLStine. It followed a similar format to ''Series/SesameStreet'' (and closer to home, Series/{{Pinwheel}}) in that it was a {{Puppet Show|s}} that also featured animated and live-action segments. In its original run, it was two hours long. Between 1999 and 2004, Creator/{{Noggin}} picked up the shortened half-hour version.

The main puppet sketches took place in a castle owned by a witch named Eureeka, and featured characters such as Magellan, the dragon, Batly, the bat, Bogge and Quagmire, twin monsters who lived in the moat, and Mr. Knack, a peddler who worked in the courtyard.

! This series contains examples of the following tropes:

* AxeCrazy: Emma, in the sketch where Magellan gets a cold. She keeps insisting that they need to operate and ends the sketch chasing Batly around with a saw.
* BigEater: Emma, who usually has to apologize for eating all of the food.
* BlindWithOutEm: Batly is even clumsier when he loses his glasses.
* BrownBagMask: In the "Don't Touch That Box!" special, Batly ends up wearing one to hide that the box turned his face invisible. Then he realises that his hands are invisible too, and quickly hides them behind his back.
* ButtMonkey: Batly always finds himself hitting walls and falling over, as well as continually losing to other people even at the things he's [[SmallNameBigEgo supposed to be good at]].
* CatchPhrase: Batly's "I meant to do that" (when he crashes), and Eureeka's "Aw, wand whiskers!" (when one of her spells fails to do what she wanted it to).
* CloudCuckoolander: Most of the characters to some extent, but especially Mr. Knack.
-->'''Mr. Knack''': Hm... this phone was working until I [[BlatantLies fixed]] it.
* CollectorOfTheStrange: Bogge and Quagmire like to collect anything they can find, sometimes even if they know it belongs to someone else.
* DontCallMeSir: One of the [[RunningGag running gags]] involves Mr. Knack insisting on the others calling him Nick, causing them to reply, "Oh… Nick Knack," to which someone else (usually one of the mice) will chime in and sing, "Paddywack, give a dog a bone!"
* DontTouchItYouIdiot: The entire premise for the half-hour special, "Don't Touch That Box!" The gang finds a box that belongs to the Grand Wizard (played by Music/LutherVandross). Knowing how powerful he is, and unsure of what the box is capable of, Eureeka warns the others not to touch it until she can get a hold of him. While she's away, however, everyone's curiosity ends of getting the better of them. HilarityEnsues.
* FailureIsTheOnlyOption: Bogge and Quagmire will never successfully con Magellan out of his peanut butter sandwich. Ever.
* GentleGiant: Magellan, and the giant who turns the castle's key. Both tower over the other characters but are very friendly, especially Magellan, who is one of the nicest characters on the show.
* {{Hammerspace}}: Mr. Knack's cart. In at least one episode, you can peer inside and see some items, some relevant and some not, floating in a rainbow-colored void.
* HiccupHijinks: Several times, and always involving Magellan, whose hiccups can shake the whole castle.
* HollywoodToneDeaf: Batly, although he can sing well too at times depending on the episode.
* IAmSong: A couple.
** Batly gets one, talking about how much of a [[TheKlutz Klutz]] he is ([[BlatantLies not]]).
** One sketch gives one to the entire cast, with each verse focusing on a different character.
* IneptMage: Eureeka usually ends up failing her spells except in the bumpers. One example: she tried to make an ice cream float with magic and ended up with the ice cream floating in the air. She does admit that she's still learning, however.
* IWantSong: "Put it on The List" sung by Bogge and Quagmire in the Christmas episode
* JerkWithAHeartOfGold: Batly, especially when it comes to his friendship with Magellan.
* TheKirk: Eureeka, often when [[SiblingRivalry the Moat Twins fight]].
* TheKlutz: Batly, whose CatchPhrase is "IMeantToDoThat". Magellan, who DoesNotKnowHisOwnStrength also qualifies.
* OrganAutonomy: Magellan's tail seems to have a mind of it's own. Needless to say, this helps contribute to Magellan's clumsiness.
* PokemonSpeak: Cooey is only able to say 'Coo', though Magellan is perfectly capable of understanding him.
* PunnyName: The names of the moat twins, Boog and Quagmire are both terms for 'swamp'.
* SiblingRivalry: The moat twins pretty much always annoy each other and fight except for when they team up to try to steal Magellan's sandwiches.
* SickEpisode: Magellan gets a cold in one sketch. The following three sketches also relate to health; one is a "Them Bones" music video, one involves a bird getting laryngitis, and one is about one clay guy PlayingSick to get out of building the boat.
* {{Sidekick}}: Superdragon's "Super Tail" (Magellan's tail in a cape). The tail usually qualifies anyway because of its seeming autonomy.
* SmallNameBigEgo: Batly thinks he's this amazing genius, but is really just a klutz who's inept at most things he tries. His IAmSong draws special attention to this.
* SneezeOfDoom: Magellan's sneezes shake the whole room and himself due to his size.
* StealthPun: Batly wears glasses and crashes into things a lot while flying. A play on the saying "blind as a bat".
* StockAnimalDiet: Both Batly and Webster, a bat and a spider respectively, love to eat bugs, much to the disgust of everyone else.
* StopCopyingMe: Bogge ends up copying Quagmire because she told him to copy her dance moves.
* SuckinessIsPainful: The others seem to feel this way about Batly's singing. In one episode, he caught Magellan's sore throat, rendering him unable to sing. The moment he said that, the whole castle rejoiced.
* SuperHero: Superdragon(dragon-dragon-dragon) and ({{Fanfare}}) Batboy, the imaginary superheroes who are [[CaptainErsatz almost the same]] as Franchise/{{Superman}} and Franchise/{{Batman}}.
* TeamMom: Eureeka is easily the most mature of the main characters, but she's not particularly mature either.
* TeamPet: Cooey, Magellan's bird... thing and Batly's [[PunnyName Webster the Spider]].
* TrademarkFavoriteFood: Peanut butter, for both Magellan and the Moat Twins.
* WeWantOurJerkBack: Happened with both Batly and the Moat Twins when a couple of Eureeka's spells accidentally made them nice
* WhatTheHellHero: In the ChristmasSpecial, everyone chews Batly out when his kicking Magellan out of the Christmas play drives him to go into the woods to find a Christmas tree.
* WindUpKey: The titular castle is actually a music box that belongs to the giant. The others will sometimes try to get him to turn the key so they can have some music.
* WorldOfPun: What causes a lot of Eureeka's IneptMage-ness is nature interpreting her spells as puns.