* ActingForTwo: Each of the boxtrolls shares a voice actor with at least one other.
** Dee Bradley Baker as Fish, Wheels, and Bucket.
** Steve Blum as Shoe and Sparky.
** Nika Futterman as Oil Can and Knickers.
** Pat Fraley as Fragile and Sweets.
** Fred Tatasciore as Clocks and Specs.
* CreatorCameo: Travis Knight is the animator in TheStinger.
* DuelingMovies: With ''WesternAnimation/TheBookOfLife''.
* FakeBrit: Americans Elle Fanning and Tracy Morgan ([[PlayingAgainstType yes, Tracy Morgan]]), and Australian Toni Collette each put on British accents for the movie.
* IWantYouToMeetAnOldFriendOfMine:
** Creator/SimonPegg plays Herbert Trubshaw, and his best friend and frequent collaborator Creator/NickFrost plays Mr. Trout. This is an odd example; since they did the voice work on the movie in separate sessions, neither one knew that the other was involved in the movie until after it was completed.
** Dee Bradley Baker and Steve Blum have worked on ''a lot'' of shows together, both being incredibly prolific voice actors, but ''WesternAnimation/TheLegendOfKorra'' and ''WesternAnimation/StarWarsRebels'' stand out.
* MethodActing:
** To capture Snatcher's vocal mannerisms as a 'guy who speaks from his belly', Creator/BenKingsley recorded Snatcher's dialogue while laying down on a chair.
** Kingsley spoke with only half of his mouth open to capture the sound of Snatcher's swollen lips when he has an allergic reaction.
* NoExportForYou: The first teaser trailer, which monologued about how some families have a mommy and a daddy, or two mommies, or have both the mommies as daddies, was not shown in America, where [[ValuesDissonance marriage equality is still a divisive subject]].
* ProductionPosse: From ''WesternAnimation/MyGymPartnersAMonkey'', we have writer Adam Pava and voice actors Nika Futterman, Tom Kenny, and Maurice [=LaMarche=].
* VoicesInOneRoom: Not everyone did so, but with the veteran voice actors like Dee Bradley Baker, Steve Blum, and so forth, this applies.
* WhatCouldHaveBeen:
** According to [[https://youtu.be/39q-mx2RjBo this interview]] with Dee Bradley Baker and Steve Blum, the language of the boxtrolls was originally going to sound more like a real world language with some gurgling. The final movie instead has them make miscellaneous sounds with a few small words thrown in, [[Franchise/DespicableMe Minions-style]], but the emotional gist is still clear.
** Initially the film focused on all five species of creatures found in the original book, but Knight noted that the script "ultimately was hollow" with all the monsters, and that "it didn't really have anything to say." The team ended up focusing on the Boxtrolls as Knight thought "there was something that was really compelling about that group of characters".
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