* AccentDepundent: Once when Courage asked for help regarding a mummy, Computer thought he meant mommy, since "mummy" is the British way of writing it.
-->'''Computer''': If your mummy is coming for a visit, then give her flowers, [[CatchPhrase you twit.]]
-->'''Courage''': ''(frowns, retypes)''
-->'''Computer''': Oh, ''a mummy'', that's much worse.
* AdoredByTheNetwork: Cartoon Network decided the pilot should become its own series, and the show has spanned four entire seasons without a single threat of having it yanked off the air, despite its scary nature. This show is also one of the few cancelled originals to still air on a regular basis.
** After the show completed its four-season, 52-episode run (typical for most cartoon series on cable networks such as Cartoon Network and Nickelodeon), many fans petitioned for a continuation, which both the network and John R. Dilworth considered, but ultimately, Dilworth decided not to continue with any further episodes or seasons. On the same token, a (possibly theatrical) movie was confirmed to be in the works, however, it never came to fruition.
* ApprovalOfGod: John Dilworth doesn't deny a single one of the WildMassGuesses made about the show, as he wants to leave it just as open to interpretation as any other work of art.
* CowboyBebopAtHisComputer: The instrument in the last episode is a ''bugle'', not a trumpet, as it's commonly assumed.
* ExecutiveMeddling: The reason behind Courage's limited speech and constant babbling and screaming after the first season.
* FanNickname: The "Perfect Trumpet Thingy" or "Eustace's Trumpet" for the blue ''[[EldritchAbomination thing]]'' in the first of Courage's nightmares in "Perfect" and "Violin Girl" for the DemonHead in "Courage in the Big Stinkin' City".
** Courage, Muriel, and Eustace together as a group is usually called "the Bagges" or "the Bagge family" by fans.
* HeyItsThatVoice: RingoStarr is the Duck Brothers. It's really him, not Creator/JessHarnell doing his [[WesternAnimation/{{Animaniacs}} Wakko]] voice (which sounds like Ringo when really it was supposed to be John Lennon).
*** Not quite, in WebVideo/RebelTaxi's interview with John Dilworth, he mentioned that Ringo Starr being in an episode was merely something done for promotion. So he wasn't really the Duck Brothers.
** Eustace's mother is the original dub voice of Anime/AstroBoy.
** [[UrbanLegend Subverted]] in one instance: [[Film/TheRockyHorrorPictureShow Dr. Frank-N-Furter]] (and King Chicken from ''{{Duckman}}'', and [[Film/TheAddamsFamily Gomez Addams]] after Raul Julia died, and [[{{It}} Pennywise the Clown]], and... [[TimCurry others]]) is '''NOT''' the Goose God, apparently; that would be series regular Paul Schoeffler.
** Arnold Stang (WesternAnimation/TopCat) provided several voices for the show including the Precious Wonderful Adorable Loveable Duckling.
** Fusilli is done by perennial favorite voice actor from the 1980s, the 1990s, and beyond: Creator/JimCummings.
*** Before that, he was the Cajun Fox.
** Muriel's [[TimeShiftedActor younger self]] was voiced by KathSoucie.
** Evil Weevil is [[Creator/TonyJay Claude]] [[Disney/TheHunchbackOfNotreDame Frollo]].
** [[Anime/SpeedRacer Speed Racer]] not only serves as a voice director for the series, but did additional voices for the show as well. Among his roles were Benton Tarentella.
** Others that have done additional voice work for the show: [[Videogame/JakAndDaxter Daxter,]] [[WesternAnimation/GodTheDevilAndBob The Devil,]] [[Series/DreamOn Toby Pedalbee,]] [[Literature/TheBerenstainBears Papa Q. Bear,]] [[WesternAnimation/DoraTheExplorer Abuela]] and [[WesternAnimation/ThunderCats Pumyra.]]
* KeepCirculatingTheTapes: Despite reruns popping up on Cartoon Network and Boomerang every now and again, the show was largely relegated to the modern-day equivalent of tape-trading - Website/YouTube - until 2010, when [[http://tvshowsondvd.com/news/Courage-Cowardly-Dog-Season-1/13573 the first season of the show was confirmed for a DVD release.]]
*** And now as of 2014 [[http://www.tvshowsondvd.com/news/Courage-Cowardly-Dog-Season-2/20069 Season 2 is set to be released in October, just in time for Halloween.]]
** You can buy the entire series on iTunes.
*** The pilot, The Chicken From Outer Space, partly plays this straight and partly averts it. It's not on the Season 1 DVD, but Jon R Dilworth sells it through his online store.
* RecycledScript: Season 3's "Curtain of Cruelty" has a similar plot to Season 2's "The Tower of Dr. Zalost", with anger and hostility infecting the Nowhere townspeople instead of sadness and depression.
* TheOtherDarrin: Lionel Wilson was replaced by Arthur Anderson as the voice of Eustace in the middle of the third season.
* TalkingToHimself: RingoStarr must have had a lot of fun arguing with himself throughout "The Duck Brothers".
* WhatCouldHaveBeen:
** So many fans were saddened by the show's ending that an online petition was formed, and sent to both Cartoon Network and Stretch Films, asking for a continuation. Because of this, a fifth season of the series ''was'' considered, but ultimately never came to be.
** On the same token, because of the series' popularity with fans, a movie was also up for consideration (whether theatrical or TV was never made clear), but nothing ever came out of it.
** Series composer Jody Gray wanted to release a CD soundtrack of the show's music scoring and songs, and even asked fans to submit requests of specifics they'd like to be included in the soundtrack. Once again, nothing ever materialized.
** Way back when, Dilworth was pitching his indie short ''The Dirty Birdie'' to Hanna-Barbera for the ''What a Cartoon!'' program, but they deemed the short unsuitable for TV, and Dilworth pitched what was to be his next indie effort ''The Chicken from Outer Space'' in order to receive funding for it, and the rest was history.
* TheWikiRule: Courage The Cowardly Dog Wiki, found [[http://courage.wikia.com/wiki/Courage_The_Cowardly_Dog_Wiki here]].