YMMV / Trick or Treat Scooby-Doo!

• Adorkable: Velma. Whenever she has a crush on Coco Diablo, she would be goofy, awkward, and downright adorable.
• Awesome Art: The animation, especially on Coco Diablo, is surprisingly fluid for a direct-to-video movie, and is easily on par with any animated film from the Disney Renaissance.
• Awesome Music:
  • "The Ballroom Blitz", the 1973 British Glam Rock hit by The Sweet, which has been used in many film soundtracks and become a Halloween standard, plays in the film during the library chase.
  • "Change", an original song created for the film that plays with the rebuilding of the Mystery Machine and then with the end credits, is like a song out of either the Glam Rock or Goth Rock schools.
• Badass Decay: Up To Eleven. The movie's climax has all the previous Scooby-Doo villains being released from prison. All they do is steal some candy and they are immediately captured one by one
• Base-Breaking Character: Coco Diablo quickly earned an Ensemble Dark Horse title on the larger fanbase thanks to being Velma's first female love interest, her attractive design, her captivating personality and cunningness (not in vain, she has a entry on Magnificent Bastard). But she also earned her fair share of detractors for those who felt her role as the Greater-Scope Villain was poorly implemented, given she was both anticlimatically defeated and Easily Forgiven. There are also those who feel she gets too much Character Shilling ^Explanation With Velma constantly praising her, been such a brilliant criminal mastermind that the Mystery Gang can't find a decent case without her presence and her autobiography published while she's on prison stealing the remaining spotlight from the Gang leading to some fans to acusse her of being a Creator's Pet.
• Big-Lipped Alligator Moment:
  • Shaggy and Scooby go trick-or-treating and get stuck to the house when they knock on the door, because the house is made of caramel. They then go on a house-eating spree until they get so fat they burst, only to wake up and realize it was All Just a Dream.
  • The ending, where Trevor unzips his skin to reveal that he was really a blonde, tan surfer on the inside.
• Character Rerailment: After multiple movies of Velma being portrayed as an Insufferable Genius and a Flat-Earth Atheist that was commonly shown to be right by the narrative no matter how improbable it could be, Trick Or Treat returns her to her Nice Girl characterization.
• It's the Same, Now It Sucks!: While the movie has being praised for playing a lot with the formula of the usual Direct to DVD Scooby-Doo movie, some fans criticized Daphne's subplot of her having a crisis for not knowing what her role is in the team as this has been a recurring storyline since the 2000s.
• LGBT Fanbase: The B-plot of Velma admitting that she's crushing on Coco Diablo was what made fans want to take a look of the movie, as it is the first time Velma is explicitly made a lesbian.
• Signature Scene: The scene where Velma admits to Daphne that she's crushing on Coco, as it is the first time Velma is explicitly made lesbian.
• They Wasted a Perfectly Good Character: The movie starts with the reveal of Coco Diablo being the Greater-Scope Villain of the entire Scooby-Doo franchise, you will think that a character with such a huge retroactive relevance for the franchise would be the main villain of her own movie, instead she's easily outsmarted and arrested in the first fifteen minutes of the movie and the rest of the movie involves the Mystery Gang dealing with the natural consequences of doing that. Even when she does return later on the movie the focus goes to Velma's crush on her and she ends up being a Red Herring and gets a Heel–Face Turn at that. She could have being a great Arc Villain through multiple movies even if she gets a Heel–Face Turn at the end instead of being a supporting character of one single movie.
• They Wasted a Perfectly Good Plot:
  • The Mystery Gang pulling a Batman Gambit to arrest their Greater-Scope Villain could have been a movie on it's own, instead it is reserved to an Action Prologue and the rest of the movie is the aftermath of that.
  • Oh no, the Scooby-Doo villains have all been released en masse on Halloween night! What are they gonna do? Oh, steal candy from trick-or-treaters, of course!
  • The climax also has the Mystery, Inc getting into the disguises to scare his old owners. Such an inversion could have being very fun to expand for a while but it lasts only two minutes and each member only uses one disguise each
• Unexpected Character: Harry the Hypnotist, whose only speaking appearance in official Scooby animation prior to this movie was the original series episode "Bedlam in the Big Top"; afterwards, he was relegated to one comic book and a few silent, out-of-series cameos.
• Unintentionally Unsympathetic: Daphne's assumption that she should be the leader of Mystery, Inc at the end can come up as a bit too harsh, as unlike other recent movies and shows where Fred gets Flanderization, Fred has being nothing but extremely competent in this movie so it feels less like Daphne earned her place and more like she's throwing a tantrum for not being taken seriously enough.
• Watched It for the Representation: What drove a lot of people to this movie was the fact that Velma was made explicitly gay, which was something the franchise tried to do for decades. She was previously intended to be portrayed as a lesbian in Scooby-Doo (2002) and Scooby-Doo! Mystery Incorporated, but executive meddling and the pitfall of running at a time less tolerant of LGBTQ+ individuals respectively forced the former to settle for making her Ambiguously Bi and the latter to drop hints regarding Velma's sexual orientation and have the creators not directly confirm it until long after the show ended its run.

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