While singing the praises of Uber, Chucky mentions how he used to need to take hostages to drive him around, which happened in several of the movies.
Tommy (Aiden Arthur) who played Lexy's date for Halloween is the is the real life older brother of Zackary Arthur who plays Jake Wheeler in the series.
When Chucky ambushes the kids at Lexy's house, he rants how he was going to take over the world with the numerous other dolls he possessed, before Andy stole the delivery truck; "And I would've gotten away with it too, if it weren't for you meddling kids!" referencing Scooby Doo.
Contains numerous Batman references, Brad Dourif was even considered for the role of the Joker in Batman (1989).
When the fertilizer bomb goes off the gas is green which is similar to the Jokers laughing gas toxin.
Devon states that the that the Belle doll reminds him of the Tiffany doll from Bride of Chucky- as in the In-Universe movie from Seed of Chucky.