* ActorAllusion:
** When the heavenly whippet looks in Charlie's records, his mother and father are named "Loni" and "Burt", and look like canine versions of Loni Anderson and Burt Reynolds (who were together at the time.) Loni also appears in the film as one of Charlie's "close friends".
** Don Bluth's birthday is also September 13, 1937. The idea that every human year is seven dog years is a myth -- Charlie is about 25. Even though he seems older.
* CelebrityVoiceActor: As well as Burt Reynolds voicing Charlie, the German dub has him voiced by the equally rascally Harald Juhnke.
* DuelingMovies: Released on the very same day as (and [[CurbStompBattle promptly slaughtered by]]) ''Disney/TheLittleMermaid.''
* ExecutiveMeddling: We were originally going to get to ''see Charlie's body'' flying off the pier (a rare example of a meddling executive making a good call). Interestingly, many book adaptations of Don Bluth films include unused artwork; ergo, the tie-in book for this film showed a very clear silhouette of Charlie's body flying alongside the car...
** Burt Reynolds is on record for saying that there was supposed to be some casual swearing in the dialogue, all of which was removed to make the film [[AnimationAgeGhetto more appropriate for children.]] An artifact of this can be heard on the soundtrack album, when Charlie angrily mumbles to himself "Damn, that Carface, I'll kill him!" In the movie, the "damn" is awkwardly cut out.
* KeepCirculatingTheTapes: Not the movie, but the original Beth Brown book the film was inspired by has been out of print for decades and is very hard and expensive to find.
* NamesTheSame: [[InvokedTrope Invoked]]. The title came from a book Don Bluth's teacher had read to him when he was a child. It was an anthology of stories about a noir-style dog detective. Bluth only remembered the title and looked it up years later when he became a filmmaker, but after writing one treatment of a straight adaptation under the name "Canine Mysteries" decided that he didn't like the story and created an entirely new one off of the title.
* NonSingingVoice: In the first film. While Judith Eva Barsi was only Anne-Marie's speaking voice, the film developers had adult actress, Lana Beeson, to do the singing voice for Anne-Marie in the SugarWiki/{{heartwarming|Moments}} TearJerker song, "Soon You'll Come Home". Barsi did audition for the singing part but [[DarkAndTroubledPast because she broke down in stress from events at home during the audition]], the filmmakers decided not to push her.
** Otherwise averted in the entire series, where many of the characters are played by professional singers.
** Subverted, considering the fact that Burt Reynolds, Dom [=DeLuise=], Ernest Borgnine, and Charles Nelson Reilly all get songs over the course of the series. It seems that the one thing each installment had in common was giving songs to actors who couldn't sing.
* TheOtherDarrin: Save for Dom [=DeLuise=] and Charles Nelson Reily as Itchy and Killer, respectively, none of the actors from the first film are in the sequel or TV show.
* RealitySubtext: Creator/JudithBarsi's murder during the film's production had a significant influence on it, such as changing Carface's machine gun to [[FamilyFriendlyFirearms a completely made-up laser gun]] and some minor design changes to [[InkSuitActor make Anne-Marie look more like her late actress]]. It unarguably has had an effect on audiences as well, who often find both the themes of morality and Anne-Marie's woobie background all the more emotional.
* TheRedStapler: Watching this movie WILL make you want to get a German Shepard.
* [[TalkingToHimself Talking To Herself]]: Annabelle and Belladonna are both played by Bebe Neuwirth.
* SleeperHit: The first film, it did poorly in the box office but became one of the greatest-selling home video releases of all time. This is what prompted MGM to have the sequel made.
* TropeNamer: For BigLippedAlligatorMoment, indirectly, through WebVideo/TheNostalgiaChick.
* TroubledProduction: The sequel, according to [[WordOfGod the directors]], was originally animated in Dublin, Ireland (where Bluth's original studio, which produced the first film, used to take place before that). But then, after Screen Animation Ireland, the Dublin studio in charge of the animation, shut its doors, the animation has to be outsourced to several studios in countries like Taiwan, Korea, Canada, and Denmark in order for the film to meet up the deadline.
* WagTheDirector: Burt Reynolds and Dom [=DeLuise=], who had developed a repertoire with one another after starring in several movies together, insisted that Don Bluth leave the room during recording sessions so that they could improvise off one another better. Despite his initial chagrin, Bluth would later admit that some of the film's best lines came from their improv.
* WhatCouldHaveBeen
** The film was originally meant to be the third collaboration between Bluth and Creator/StevenSpielberg, but Spielberg quit after the two butted egos on ''WesternAnimation/TheLandBeforeTime''.
** Bluth originally conceived the film as a short entitled "Canine Mysteries" as part of a package film, which would have also included an adaptation of ''The Velveteen Rabbit''. Based on [[http://dragonslairthemovie.com/canine-mysteries/ some recently-shared concept art]], the dogs would have had more direct interaction with humans.
** Several seconds of the Hell sequence were cut for being too frightening. [[https://www.youtube.com/watch?v=Gr7khtV7GAs The full version]] has recently surfaced.
** Burt Reynolds originally read his part with a more cartoonish "doggie" (read: Franchise/ScoobyDoo) voice, which nobody liked. Reynolds persisted, saying it was cute, until Dom [=DeLuise=] pulled him aside and said "Burt, don't be an [[PrecisionFStrike asshole]]," at which point he dropped it.
* WriteWhoYouKnow: Charlie was designed after Gary Goldman's dog Burt (named for Reynolds). Goldman first found the pooch chasing after Reynold's car leaving their first lunch meeting.

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