The real R.L. Stine makes a cameo appearance as the presenter of the Science Award at the end of the film.
Jack Black,while reprising his role of R.L. Stine doesn't have much screen time in this sequel. This was due to him working on another film, The House With A Clock in Its Walls, which released 3 weeks before Goosebumps 2: Haunted Halloween.
When R.L. Stine (Jack Black) arrives in town to save Halloween, he sees a floating red balloon near a storm drain and says, "I KNEW I had that idea first!" This is an iconic symbol for the Stephen King movie "IT" (2017). Jeremy Ray Taylor, who plays Sonny in this Goosebumps movie, also stars as Ben Hanscom in "IT".
Original drafts of the script set the film to take place in "Horrorland" with the numerous characters making an appearance in the books, "infamous" theme park.
Rob Letterman was unable to return as director for the sequel because he was busy working on Detective Pikachu (2019).
This movie marks the first time to have Jack Black and Mick Wingert sharing the role of a different character outside the Kung Fu Panda franchise. Wingert replaced Black as the voice of Po in various Kung Fu Panda video games and television shows and now in this movie, Wingert takes over Black as the voice of Slappy.
This will be Jack Black's and Madison Iseman's second collaboration since Jumanji: Welcome to the Jungle (2017), where they both played the same character. However, unlike this movie, they don't share any screen time.
Both Jeremy Ray Taylor and Caleel Harris have been in Stephen King adaptations. Jeremy plays Ben Hanscom in Stephen King's IT, and Caleel plays young Henry Deaver in Stephen King's Castle Rock.
Dylan Minnette was unable to reprise his role as Zach from the previous installment due to scheduling conflicts with 13 Reasons Why (2017).
Jack Black, who lent his voice to the evil Slappy puppet in Goosebumps, this time gave way to Mick Wingert. The latter also replaced Black in another of his vocal roles, that of Po in Kung Fu Panda. It is indeed him who doubles the character in the related video games and the animated TV to the franchise.
The school both kids attend is called Daniel Webster, a reference to the short story The Devil and Daniel Webter, by Stephen Vincent Benet.
A sequel to 2015's "Goosebumps" film, which is based on R. L. Stine's best-selling children's book series, Goosebumps.
Sony Pictures Animation's third film to feature living gummy bears. The first two being Cloudy with a Chance of Meatballs (2009) and Cloudy with a Chance of Meatballs 2 (2013).
The Halloween costumes the main characters wear towards the end of the movie are a skeleton, a jack-o'-lantern and a witch. This is a homage to the movie Halloween III: Season Of The Witch (1982).
In May 2017, the title was initially said to be Goosebumps: HorrorLand. The film was renamed Goosebumps: Slappy's Revenge, and in April 2018 the title was renamed Haunted Halloween.
For it's home video release, the movie is simply titled "Goosebumps 2" dropping the subtitle "Haunted Halloween".
This film is 13 minutes shorter than Goosebumps (2015). Goosebumps (2015) was 103 minutes (1 hour and 43 minutes) and this film is 90 minutes (1 hour and 30 minutes)
Unlike the previous installment, Village Roadshow Pictures is not involved with this film.
Like the first film, this Goosebumps movie will be released the same year as a Jurassic World movie. Goosebumps (2015) was released the same year Jurassic World (2015) was released. Goosebumps 2: Haunted Halloween (2018) will also be released the same year as Jurassic World: Fallen Kingdom (2018).
The seventh Sony Pictures Animation film to be produced in 2.35:1, after Cloudy with a Chance of Meatballs (2009), The Pirates! Band of Misfits (2012), Cloudy with a Chance of Meatballs (2009), Goosebumps (2015), The Emoji Movie (2017) and Peter Rabbit (2018).