The Home Alone parody bit (with the kid running around and shouting) does not withstand the test of time and just comes off as odd now.
For no reason more than slightly-extra silliness, the 12th century fox runs off with a message tied around it's neck to the sound of... a dolphin call?
Crowning Music of... Funny?: The musical switchups during Robin and Little John's staff fight. It gets faster and sillier the shorter their staffs get, then finally turns into a chirpy, cartoonish ditty when they're reduced to smacking each other's knuckles with sticks.
This was Dave Chappelle's first film. Who would have guessed he would later make a successful and over-referenced gag out of a guy named Lil Jon?
Will Scarlett O'Hara is played by Matthew Porreta, who played Robin Hood later on in a TV series. note Which was riding on the popularity of Kevin Sorbo's Hercules series at the time, rather than any Robin Hood property. There was also a Sinbad series then. They replaced him in the role long before it was discontinued.
A minor one, but the Italian assassin who Don Giovanni dispatches to kill Robin? His name is "Dirty Ezio."
Cary Elwes makes fun of Kevin Costner's terrible British accent in this film. Later, Elwes famously attempted an American accent in Saw and failed spectacularly (oddly enough, his fake American accent in Hot Shots! and Liar Liar are believable).
Ho Yay: Prince John and the Sheriff of Rottingham, in spades.
Rabbi Tuckman, who is one of the most iconic characters of the movie despite appearing in only two scenes.
Don Giovanni, who's only seen once, yet leaves a likewise memorable impression as the Sheriff's trusted cohort.
The Young Lad. Though his scene is a cheap Home Alone gag, the young actor's over-the-top performance makes it one of the funniest scenes in the movie.
So Okay, It's Average: Generally considered one of Mel Brooks' weakest films and the penultimate sign that his prolific film career was coming to an end. But a weak Mel Brooks movie is still a Mel Brooks movie.
Special Effects Failure: Blinkin runs into what is obviously a fake tree at one point. Then again, given that this is a Mel Brooks parody movie, this may very well have been intentional.