I revisited this yesterday with my nephew n daughter.
This one is a stand alone sequel n apart from Jack Black in a tiny role, none of the cast from the previous film returns here.
This time two young boys gets hold of an unpublished n unfinished Goosebumps book titled Haunted Halloween. How the book is kept in the dilapidated n abandoned house is never explained. They also find Slappy n brings it to life by speaking magic words found in the dummy's pocket. So a lil confusion here. Slappy is found aft opening the book but he comes alive aft the magic words. Also Slappy brings all the Halloween monsters to life including the Werewolf n Snowman, albeit in a tiny role n that too without opening any book.
This time two young boys gets hold of an unpublished n unfinished Goosebumps book titled Haunted Halloween. How the book is kept in the dilapidated n abandoned house is never explained. They also find Slappy n brings it to life by speaking magic words found in the dummy's pocket. So a lil confusion here. Slappy is found aft opening the book but he comes alive aft the magic words. Also Slappy brings all the Halloween monsters to life including the Werewolf n Snowman, albeit in a tiny role n that too without opening any book.