This is the second time a character becomes muscular. The first was Keswick (as a hologram) in Snapnapped.
The boy scout clothing worn by Snaptrap is almost identical to the one used in Snappy Campers (the difference is that he uses a pair of pants instead of shorts).
This is the second time is seen an iPhone in the series (this time it is used by Snaptrap), the first was in Happy Howl-O-Ween.
Snaptrap's cabin features a hockey mask which is usually worn by the villain Jason Voorhees in the Friday The 13th series and the Necronomicon (Book of the Dead) seen in The Evil Dead series. The cabin itself is also a reference to both series as they both had a cabin as a main setting for a majority of their films.
Dudley's long hair, bandanna, and muscular physique is a reference to John Rambo, the titular main character from the Rambo series.