The bar where Fletch enters as "Ed Harley" is the same bar where Pee Wee Herman does the Tequila dance in Pee-wee's Big Adventure (1985).
Although credited as "Gillet" in part one, George Wyner's character is not referred to as Gillet until this film. In part one, Fletch called him Mr. Arnold T. Pants, Esq., although not to his face, and therefore is simply taken as another wisecrack from Fletch.
The set of the Farnsworth Television Ministry is actually the Universal Amphitheater concert arena at Universal Studios Hollywood.
Fletch's complete list of disguises and aliases is: Peggy-Lee Zorba, Nostradamus, The Colonel, Billy-Jean King, Claude-Henry Smoot, Peter Lemonjello, Ed Harley, Elmer-Fudd Gantry, Henry Himmler, Victor Hugo, and Bobby-Lee Schwartz II.
In the scene where Fletch is singing "Zippedie Doo Dah", the Underhill's from the first Fletch Movie (tennis club) are dancing right behind Fletch, rackets and all!
Though there were eight sequels and prequels written by Gregory McDonald that could have been used as the basis for the second "Fletch" movie at the time, Universal decided to write a completely new story.
In the scene when Fletch hides in the morgue's refrigerator from Ben Dover, the chalkboard in the background has names for the other corpses in storage. Names include those of Wally Cox, Carol Wayne, Alan Ludden, Paul Lynde, all of whom made appearances on _"The Hollywood Squares" (1965)_. Most likely, this was done because of the 3 x 3 grid of the refrigeration units.
The character Jimmy Lee Farnsworth mimics those of the televangelist 'Peter Popoff'.
The last name of televangelist Jimmy Lee Farnsworth is the same as that of the widely-acknowledged inventor of television, Philo T. Farnsworth.
Fletch dreams about a Song of the South (1946) re-enactment. Chevy Chase as Clark Griswold mentioned the theme song "Zippedie Doo Dah", having an outburst in Vacation (1983). National Lampoon, in turn, spoofed Disney Pictures: owner of "South".