History WesternAnimation / ScoobyDooAndTheCurseOfThe13thGhost

* ArtisticLicenseLaw: The police officer not only forbids Mystery Inc. from investigating any more cases, but he also forbids Fred from ''driving the Mystery Machine'' anymore. The van is legally Fred's property (or at least his parents' property), and there's nothing criminal about a 17-year-old with a driver's license making ''routine'' use of his own vehicle for errands and so forth, so the cop was seriously exceeding his authority there.

* CerebusRetcon: Shaggy and Scooby's CowardlyLion nature gets this. At one point Shaggy lampshades how he and Scooby are terrified of every monster they've encountered despite it always being a crook in a costume or a hoax: They've ''met'' actual ghosts, so of course the two are gonna be scared of encountering '''real''' monsters.

%%* ContinuitySnarl: While ''WesternAnimation/ScoobyDooMoonMonsterMadness'' showed that she not only didn't have a license, but drove pretty poorly while making the attempt to learn. Here, Daphne can drive to the point of being a BadassDriver as if it is nothing. It is possible she did get better between movies, however.

* UnfinishedBusiness: What kickstarts the movie; the buyer who brings out Vincent Van Ghoul's crystal ball dig up bad memories from Daphne, Shaggy and Scooby...not helping that the 13th Ghost is still out there.

* WhamShot: Coupled with the line, but the OhCrap Moment with Daphne, Shaggy and Scooby and seeing Vincent Van Ghoul's face in the crystal ball!

* WouldYouDoItForAScoobySnack: Played with. Daphne tells Fred to do this with Shaggy and Scooby, but Shaggy has to tell Freddy on how to "haggle" correctly.

* SpellMyNameWithAnS: There is debate on the name of the 12th ghost from "Horror-scope Scoob". The DVD of the original series named him Simbooloo. (We know the dvd was accurate on Reflector Specter's name as it was no where in the actual episode). This movie and the recent Scooby Doo encyclopedia have gone with Zimbulu.

* CriticalResearchFailure: In-Universe Velma makes a few statements that really don't make sense. Within the context of this film Velma is written as a hardline cynic which these may be intended to show she's not even making sense with the series own history, but also given the series this movie was continuing had loads of meta humor it is also possible out-of-universe the meta references were more important than in-universe sense. However both are examples in-universe of this trope.
** When Fred and her return to Flim Flam's shop she claims that "someone is going to release 13 of the most dangerous ghosts on face of the earth". This is of course a cool MythologyGag but in actuality what they were going to stop was the alleged 13th ghost from freeing the other 12. At the end of this scene Flim Flam says "Wait did you say 13 ghosts?" before a scene cut leaving it unsure if he corrected her there or not.
** However even more infamously Flim Flam directly calls out that Scrappy is not present for this reunion which leads Velma to ask "what's a scrappy?" Nobody else really gives a response to this before Daphne reminds them of the plot to run off to.

** Velma is firm in her belief that ghosts and the supernatural aren't real, which has become a core character trait since ''WesternAnimation/ScoobyDooFrankencreepy''. Viewers were recently reminded of this in the crossover with ''Series/{{Supernatural}}''.

** "Asmodeus" is [[NamesTheSame the name of a demon]] from the series ''Series/{{Supernatural}}'', which just did [[Recap/SupernaturalS13E16ScoobyNatural a crossover episode]] with ''Franchise/ScoobyDoo'' the previous year before this film.[[invoked]]

* BigRedDevil: The 13th, and final, ghost of the Cursed Chest of Demons, Asmodeus, has horns, is red, and has wings.

* ReluctantRetiree: Mystery Incorporated is forced into one after one of their investigations leads into them accusing an innocent man, causing the sheriff to give a heads-up on how [[RealityEnsues future screw-ups could lead to pressed charges or jailtime, as well as administer an ultimatum for the gang to stop investigating]]. Shaggy and Scooby welcome it, but once they find Van Ghoul's crystal orb again, though, [[TenMinuteRetirement this doesn't last]].

* RealityEnsues:
** After fifty years, Mystery Inc. was bound to get one wrong eventually. And as they're just meddling kids without any legal law enforcement (or even private investigator) credentials, the sheriff warns the gang how the law will come down extra hard on them if another screw-up happens in their adult years as well as give his own ultimatum. The potential legal issues force the gang to reconsider and quit.
** The gang's reaction to said forced retirement is also a good show of their thoughts on it. Fred and Velma, who loved the thrill and intellectual challenge, are the most disheartened. Daphne is more ambivalent due to her being in danger so much. Shaggy and Scooby, who hated the dangerous antics and only stuck with it out of concern for their friends, take to retirement with gusto.
** Because of Scooby suffering a breakdown, Daphne and Shaggy decide to end their hunt for the escaped ghosts before completing the capture of all 13. As Fred points out to her, they didn't consider that leaving this unfinished business alone might come back at some point in their lives.
** Scooby having had a nervous breakdown makes perfect sense when in episodes like "It's a Wonderful Scoob", he was forced to relive every horrifying moment of his life and in "Ship of Ghouls", Bogel and Weerd specifically attempted to murder him in a moment of vulnerability via fear-induced heart attack. It's no wonder Shaggy and Daphne agreed to keep quiet after that.
** During Daphne, Vincent, Shaggy, and Scooby's wild snow sliding down the mountain, Vincent groans in aches and pains as the whole thing is too much for someone his age to endure.

** "Asmodeus" is the name of a demon from the series ''Series/{{Supernatural}}'', which did [[Recap/SupernaturalS13E16ScoobyNatural a crossover episode]] with ''Franchise/ScoobyDoo'' just the previous year before this film.